does the fourth entrant make any difference entry and competition in the early u s broadband market abstract we study the importance of sunk costs in determining entry conditions and inferences about firm conduct in an adapted bresnahan and reiss 1991 1994 framework in our framework entrants incur sunk costs to enter while incumbents disregard these costs in deciding on continuation or exit we apply this framework to study entry and competition in the local u s broadband markets from 1999 to 2003 ignoring sunk costs generates unreasonable variation in firms competitive conduct over time this variation disappears when entry costs are allowed once the market has one to three incumbent firms the fourth entrant has little effect on competitive conduct

multiple equilibria and deterrence in airline markets we use data from the us airline industry to estimate a model of entry deterrence we model the interaction among airlines as a repeated static game where we allow for a very general form of heterogeneity we consider a menu of three alternative games that describe the strategic interaction among airlines simultaneous and sequential move games and a sequential move game with deterrence investments following bernheim 1984 deterrence investments include all investment that raises barriers to entry and for which the incumbent must incur some investment costs we show that the profits that incumbents can make in the sequential game both with and without deterrence investments are larger than those that they can make if the game is played simultaneously thus we find that on average it is profitable for all firms to deter new entrants with the exception of united airlines remarkably united airlines was under bankruptcy protection during the period of analysis suggesting that its deterrence investments were not credible overall we find that the data is explained better by a model where firms make deterrence investments thus we cannot reject the hypothesis that incumbents deter entrants in the airline industry

not all rivals look alike estimating an equilibrium model of the release date timing game a very serious game of strategy is at work a cross between chess and chicken which studio distribution chiefs play year round but with increasing intensity during the summer and holiday release period new york times december 6 1999 hubris hubris if you only think about your own business you think i ve got a good story department i ve got a good marketing department we re going to go out and do this and you don t think that everybody else is thinking the same way in a given weekend in a year you ll have five movies open and there s certainly not enough people to go around joe roth chairman of walt disney studios answering a question about the large number of major movies opening within days of each other los angeles times december 31 1996 i introduction the number of americans who go to the movies varies dramatically over the course of the year and sometimes more than doubles within a period of two weeks at the same time the first week accounts for almost 40 of the box office revenues of the average movie the combination of these two facts makes the timing of launching a new movie a major focus of attention for distributors of movies with virtually no subsequent price competition the movie s release date is one of the main short run vehicles by which studios compete with each other in this paper i develop and estimate a model of discrete games which allows me to analyze this release date timing game most empirical industry studies focus on price and quantity competition taking other product characteristics as given in many industries however prices play a very small role and competition is channeled through other product attributes the entertainment industry is a prime example competition among movies television programs or broadway shows is on nonmonetary product attributes such as content advertising and time therefore understanding competition in such industries requires a model that endogenizes some of these product attributes especially those that can be changed in the short run this paper provides a framework in which release decisions can be endogenized and nonprice competition can be analyzed the absence of price competition is useful because it allows the focus of the analysis to be on the timing dimension without relying on assumptions about the nature of the postrelease price competition 1 together with the frequent timing decisions associated with different movies this makes the motion picture industry quite attractive for empirical analysis of the timing game this industry however is not the only example in which timing decisions play a central role similar timing considerations are also important in the release decisions of books compact disks and other new products as well as in the scheduling decisions of major events television programs flight schedules and promotional sales 2 when taking on a new project distributors of movies typically plan for a friday release which falls within a relatively short window of time carefully chosen to match the type of the movie this makes the choice of the release date a very discrete one the exact friday within the season is generally determined by a strategic timing game played among distributors before each release season distributors scramble to release their movies on big holiday weekends when demand is high when doing so each distributor tries to release on the attractive holiday weekend and at the same time to deter competitors from doing the same the extent to which distributors are successful in doing so largely depends on the quality of the movies at their disposal and on the way they can compete with movies released by other studios thus modeling this timing game must account for the asymmetries among movies and for the variation in these asymmetries across release seasons specifically i develop and estimate a sequential move game with private information i assume that the observed release date decisions are the equilibrium outcome of such a game

debt and financial expectations an individual and household level analysis in this article we show that optimistic financial expectations impact positively on both the quantity of debt and the growth in debt at the individual and household levels our theoretical model shows that this association is predicted under a variety of plausible scenarios in the empirical analysis we explore the determinants of debt and of growth in debt using british data we find convincing support for our theoretical priors and show that it is optimistic financial expectations per se that are important in influencing debt rather than the accuracy of individuals predictions regarding their future financial situation jel d18 d84 d91

estimating dynamic games of oligopolistic competition an experimental investigation we evaluate standard assumptions in the estimation of dynamic oligopoly models with laboratory data using an entry exit game we estimate structural parameters under the assumption that the data are generated by a markov perfect equilibrium and subsequently predict counterfactual behavior if behavior was collusive however the assumption would be violated and one would mispredict counterfactuals the laboratory allows us to compare predicted behavior to true counterfactuals implemented as treatments our main finding is that prediction errors due to collusion are modest in size we also document a different deviation from equilibrium behavior inertia that can lead to large prediction errors

consumer expectation and output growth the case of china abstract this study shows that china s consumer expectation index contains useful information about pure expectation shocks which are unrelated to economic fundamentals it turns out that such shocks are likely to be an important independent driver of industrial output growth

marketing mix and brand sales in global markets examining the contingent role of country market characteristics marketing products globally is challenging due to the diverse nature of markets we use market heterogeneity unbranded competition resource and infrastructure availability and sociopolitical governance as country market characteristics that distinguish between developed and emerging countries we investigate their moderating role on the relationship between elements of the marketing mix and brand sales we provide evidence from a hierarchical linear model and a panel data set of brands from 14 emerging and developed markets that account for 62 of the global gdp that country market characteristics moderate the relationship between the complete set of marketing mix elements and brand sales performance asymmetrically while distribution and price have the largest impact in emerging and developed countries respectively product innovation and advertising have significantly larger impacts in emerging markets relative to developed countries these finding highlights the importance of contingency view of marketing strategy in global markets

chapter 4 competitive marketing strategies game theoretic models publisher summary this chapter reviews the key developments in the understanding of competitive marketing strategies product price advertising and distribution competition are all addressed while the emphasis is on models the chapter surveys the empirical literature as well there is a significant amount of empirical work to report but the ratio of theoretical to empirical work is nevertheless unpleasantly large much progress has been made in the last ten years or so in the study of competitive marketing strategies most of this chapter has been theoretical using simple models of firm and consumer behavior these models serve the function of demonstrating rigorously the existence of certain effects factors which need to be considered in analyzing real world competition

nonlinearly weighted convex risk measure and its application abstract we propose a new class of risk measures which satisfy convexity and monotonicity two well accepted axioms a reasonable and realistic risk measure should satisfy through a nonlinear weight function the new measure can flexibly reflect the investor s degree of risk aversion and can control the fat tail phenomenon of the loss distribution a realistic portfolio selection model with typical market frictions taken into account is established based on the new measure real data from the chinese stock markets and american stock markets are used for empirical comparison of the new risk measure with the expected shortfall risk measure the in sample and out of sample empirical results show that the new risk measure and the corresponding portfolio selection model can not only reflect the investor s risk averse attitude and the impact of different trading constraints but can find robust optimal portfolios which are superior to the corresponding optimal portfolios obtained under the expected shortfall risk measure

residential segregation discrimination and african american theater entry during jim crow abstract we examine the effect of residential segregation on the entry of movie theaters serving african american customers in the 1950s which provided an alternative to the segregated theaters of the jim crow era consistent with preference externalities in racial and ethnic enclaves we find that greater residential segregation was associated with more african american theater entry estimates from a model of firm entry indicate that residential segregation increased the variable profits of african american movie theaters reducing the market size required for theater entry by 13 3 percent for a one standard deviation increase in segregation we also provide evidence that racial bias increased both variable profits and fixed costs and on net reduced african american theater entry an interpretation consistent with this finding is that racial animus forced black customers toward segregated accommodations while also limiting access to key inputs for potential entrants

liquidity shocks size and the relative performance of hedge fund strategies abstract we examine whether the increase in the flow of capital to hedge funds over the period 1994 2005 had a negative impact on performance more specifically we study the relative performance of small versus large funds for each of the hedge fund strategies our results indicate that on an absolute return basis small funds outperform large funds on a risk adjusted return basis however we find that large funds outperform small funds and that large funds are also shown to hold less liquid assets and take on less systematic and idiosyncratic risk than small funds further funds that experience positive liquidity shocks generally outperform those that experience negative liquidity shocks we also find evidence that hedge fund managers that are aggressive in dealing with liquidity shocks perform better than hedge fund managers that are conservative in dealing with liquidity shocks

cournot oligopoly and the theory of supermodular games abstract we reconsider the cournot oligopoly problem in light of the theory of supermodular games invoking the recent ordinal version of this theory proposed by milgrom and shannon we generalize novshek s existence result derive the associated uniqueness result give an extension of a classical existence result under symmetry and provide conditions making a cournot oligopoly into a log supermodular game with the natural order on the action sets we also provide extensive and precise insight as to why decreasing best responses are widely regarded as being typical for the cournot model with production costs several illustrative examples are provided journal of economic literatureclassification numbers c72 l10 l13

do public banks compete with private banks evidence from concentrated local markets in brazil we measure the competitive effect of public banks in concentrated local markets in brazil using branch location patterns we employ variation in market size number and identity of competitors to determine how the conduct of private banks is affected by the entry of a public bank we find that the market size needed to sustain a private bank branch is 35 larger if a private competitor is present and is not significantly affected by the presence of a public bank these results suggest that the presence of a public bank does not affect conduct of private banks

the level and quality of value at risk disclosure by commercial banks in this paper we study both the level of value at risk var disclosure and the accuracy of the disclosed var figures for a sample of us and international commercial banks to measure the level of var disclosures we develop a var disclosure index that captures many different facets of market risk disclosure using panel data over the period 1996 2005 we find an overall upward trend in the quantity of information released to the public we also find that historical simulation is by far the most popular var method we assess the accuracy of var figures by studying the number of var exceedances and whether actual daily vars contain information about the volatility of subsequent trading revenues unlike the level of var disclosure the quality of var disclosure shows no sign of improvement over time we find that var computed using historical simulation contains very little information about future volatility

testing models with multiple equilibria by quantile methods this paper proposes a method for testing complementarities between explanatory and dependent variables in a large class of economic models the proposed test is based on the monotone comparative statics mcs property of equilibria our main result is that mcs produces testable implications on the small and large quantiles of the dependent variable despite the presence of multiple equilibria the key features of our approach are that i we work with a nonparametric structural model of a continuous dependent variable in which the unobservable is allowed to be correlated with the explanatory variable in a reasonably general way ii we do not require the structural function to be known or estimable iii we remain fairly agnostic on how an equilibrium is selected we illustrate the usefulness of our result for policy evaluation within berry levinsohn and pakes s 1999 model

testing mixed strategy equilibria when players are heterogeneous the case of penalty kicks in soccer the concept of mixed strategy is a fundamental component of game theory and its normative importance is undisputed however its empirical relevance has sometimes been viewed with skepticism the main concern over the practical usefulness of mixed strategies relates to the indifference property of a mixedstrategy equilibrium in order to be willing to play a mixed strategy an agent must be indifferent between each of the pure strategies that are played with positive probability in the mixed strategy as well as any combination of those strategies given that the agent is indifferent across these many strategies there is no bene t to selecting precisely the strategy that induces the opponent to be indifferent as required for equilibrium why an agent would in the absence of communication between players choose exactly one particular randomization is not clear of course whether agents in real life actually play nash equilibrium mixed strategies is ultimately an empirical question the evidence to date on this issue is based almost exclusively on laboratory experiments e g barry o neill 1987 amnon rapoport and richard b boebel 1992 dilip mookherjee and barry sopher 1994 jack ochs 1995 kevin a mccabe et al 2000 the results of these experiments are mixed o neill 1987 concludes that his experimental evidence is consistent with nash mixed strategies but that conclusion was contested by james n brown and robert w rosenthal 1990 with the exception of mccabe et al 2000 which looks at a three person game the other papers generally reject the nash mixedstrategy equilibrium while much has been learned in the laboratory there are inherent limitations to such studies it is sometimes argued that behavior in the simpli ed arti cial setting of games played in such experiments need not mimic real life behavior in addition even if individuals behave in ways that are inconsistent with optimizing behavior in the lab market forces may discipline such behavior in the real world finally interpretation of experiments rely on the assumption that the subjects are maximizing the monetary outcome of the game whereas there may be other preferences at work among subjects e g attempting to avoid looking foolish that distort the results tests of mixed strategies in nonexperimental data are quite scarce in real life the games played are typically quite complex with large strategy spaces that are not fully speci ed ex ante in addition preferences of the actors may not be perfectly known we are aware of only one paper in a similar spirit to our own research using data from classic tennis matches mark walker and john wooders 2001 test whether the probability the player who serves the ball wins the point is equal for serves to the right and chiappori department of economics university of chicago 1126 east 59th street chicago il 60637 levitt department of economics university of chicago groseclose graduate school of business stanford university 518 memorial way stanford ca 94305 the paper was presented at games 2000 in bilbao and at seminars in paris and chicago we thank d braun j m conterno r guesnerie d heller d mengual p reny b salanie and especially j l ettori for comments and suggestions and m mazzocco and f bos for excellent research assistance any errors are ours 1 the theoretical arguments given in defense of the concept of mixed strategy equilibria relate either to puri cation john c harsanyi 1973 or to the minimax property of the equilibrium strategy in zero sum games for recent elaborations on these ideas see authur j robson 1994 and phil reny and robson 2001 2 the ultimatum game is one instance in which experimental play of subjects diverges substantially from the predicted nash equilibrium robert slonim and alvin e roth 1998 demonstrate that raising the monetary payoffs to experiment participants induces behavior closer to that predicted by theory although some disparity persists

public good provision with constitutional constraint this article studies the public good provision problem in which the principal faces a constitutional constraint in the sense that in order for a public good provision mechanism to be implemented it must first be approved by agents under a prespecified voting rule i find that as long as the voting rule is not the unanimity rule the principal can propose a mechanism such that first best efficiency of provision of the public good is achieved i also consider various constraints such as prohibition of discriminatory mechanisms and the existence of vote buying and discuss optimal voting rules in these situations

consumer confidence and rational expectations are agents beliefs consistent with the theory consumer confidence is found to have predictive content for a wide range of macroeconomic variables including consumption growth contrary to standard repih we find that on uk data the repih is rejected due to the predictive content of consumer confidence and not labour income we explain this finding in terms of precautionary behaviour extending the hansen and singleton consumption capm model to allow a conditional variance we find a high level of confidence is associated with both greater optimism about the level of consumption and greater uncertainty about the forecaster variance once allowance is made for time aggregation the over identifying restrictions implied by this model are accepted we estimate a small but statistically significant intertemporal elasticity of substitution

confidence and the real economy the japanese case this paper empirically analyses whether consumer confidence has an effect on the real economy in japan this paper uses vector autoregressions including variables which represent consumer confidence it is shown that in the cases of quarterly and monthly data consumer confidence has a significant effect on gdp fluctuations whereas in the case of semiannual data it has no effect in other words consumer confidence has an effect on only short term economic fluctuations

changes in the distribution of housing wealth in great britain 1985 91 during which time sizeable real capital gains accrued to owner occupiers particularly those who were already owner occupiers at the start of this period the paper constructs housing wealth estimates disaggregated by household from the 1985 ghs and 1991 bhps wave 1 in order to explain the distributional consequences of the housing market experience the paper finds that there has been a modest increase in housing wealth inequality but one that is more pronounced for gross housing wealth compared with equity this growth has been offset by the growth in owner occupation and the benefits of the council house right to buy scheme

the usefulness of consumer confidence in forecasting household spending in canada a national and regional analysis i introduction in 1960 the conference board of canada launched its series of quarterly surveys of consumer attitudes since then the results of these surveys have provided policy makers economic forecasters and business managers with useful information on future economic trends the increasing demand for the survey results both by the public and the business sectors as well as the expanding coverage given to them in the media appear to confirm their popularity and usefulness to better gauge consumer sentiment the conference board of canada also designed the index of consumer attitudes ica for the entire nation as well as for the five canadian regions the atlantic provinces quebec ontario the prairies and british columbia 1 the ica is derived from answers to four attitudinal questions contained in the survey of consumer attitudes because two of these four questions relate to the respondent family s economic prospects over the next six months and to the employment prospects for the community over the next six months the index is widely thought to reflect consumer expectations with respect to future economic conditions which in turn would influence consumption behavior a number of empirical studies have investigated the effectiveness of indices of consumer confidence as leading indicators of consumer spending in canada an early paper by shapiro and angevine 1969 finds that the composite index of consumer mood derived from the financial post s quarterly survey of consumer buying intentions is a very useful tool for predicting consumer spending on durable goods 2 in a follow up study angevine 1974 also finds that measures of consumer mood based on the financial post s survey are statistically significant explanatory variables for three consumption categories nondurable goods semidurable goods and services rayfuse 1982 reports that consumer sentiment as captured by the ica tends to lead movements in consumer expenditures on durable goods by one quarter 3 more recently cote and johnson 1998 examine whether the ica improves the fit of a consumption equation that includes other macroeconomic variables they find that inclusion of the ica improves the explained variation in growth in consumer expenditures per capita by 18 percentage points 4 the purpose of our article is to provide a fresh empirical perspective on the effect of consumer confidence on household spending in canada although past studies confine their attention to national data the present investigation examines the ability of the ica as well as the individual attitudinal questions used in the survey to forecast canadian household spending not only nationwide but also at a regional level to our knowledge our study represents the first endeavor in the literature to assess the usefulness of regional consumer confidence indices in forecasting household spending our work also employs significantly extended time series for the various components of consumer expenditure used in previous canadian studies employing the results of the conference board of canada s survey of consumer attitudes for the sample period 1979q4 2001q4 our empirical findings indicate that at the national level the ica is a reliable predictor of total personal consumption expenditures as well as of various subcategories of consumer spending in the presence of control variables on the other hand our regional results are quite diverse suggesting that economic fore casters and government policy makers should be cautious about using regional confidence indicators to predict consumption growth the remainder of this article is structured as follows section ii describes the four attitudinal questions used in the construction of the ica at both the national and the regional levels section iii discusses the econometric methodology and the data employed in our empirical analysis section iv reports the correlations between growth in total personal consumption expenditures pce and the contemporaneous ica as well as the different lags of the ica

entry into regulated monopoly markets the development of a competitive fringe in the local telephone industry abstract incumbent firms operating in today s local telephone industry are beginning to face competition from new entrants using the dominant firm competitive fringe framework and a recently constructed panel data set of local telephone markets this paper provides an empirical analysis of the competitive transition underway in the u s local telephone industry of particular interest is the differential impact of economic regulation on the development of fringe competition in flocal telephone markets empirical results reveal that local telephone markets with price cap regulation have witnessed less net fringe entry and subsequently contain smaller competitive fringes during the time period studied these findings imply that the widespread adoption of price cap regulation by state public utility commissions has contributed to the slow development of local telephone competition to reconcile this surprising conclusion a political economy explanation that details how state regulators have benefited from

comparing open and sealed bid auctions evidence from timber auctions we study entry and bidding patterns in sealed bid and open auctions using data from the u s forest service timber auctions we document a set of systematic effects sealed bid auctions attract more small bidders shift the allocation toward these bidders and can also generate higher revenue a private value auction model with endogenous participation can account for these qualitative effects of auction format we estimate the model s parameters and show that it can explain the quantitative effects as well we then use the model to assess bidder competitiveness which has important consequences for auction design

do nonprofit and government nursing homes enter unprofitable markets i introduction nursing home care is provided in the united states by for profit private nonprofit and government organizations 1 these three organizational forms may compete directly in the same markets with either differentiated or nondifferentiated output or serve entirely separate markets an understanding of which organizational forms will provide the most effective care in a given set of circumstances requires knowledge of in what ways and to what extent the nature of health care provision varies across organizational forms in the context of a market economy in which profit maximizing firms are the default producers the natural question from a welfare perspective is whether consumer surplus would decline if government and nonprofit providers were replaced with for profit providers this study examines whether nonprofit and government nursing facilities expand access to nursing home care through an examination of patterns of nursing home entry in the rural united states i employ methods due to bresnahan and reiss 1990 to identify markets that are unlikely to be profitable for for profits to enter and then ask whether nonprofits and government nursing homes as a consequence of policies that lower their costs relative to for profits locate in these unprofitable markets equivalently if government and nonprofit nursing homes were to exit isolated markets could one reasonably expect that for profits would enter to replace them any evidence suggesting that they would not supports the argument that government and nonprofit nursing home care providers contribute positively to social welfare by expanding access to care in assessing potential differences in care provided by the different organizational forms the literature has focused largely on access and quality differentials two questions of interest naturally arise when studying access to care first is any care available in the market that is is there a nursing home second if care is available to some in the market is it available to all that is are nursing homes full or do they discriminate at the point of admission on the basis of wealth health status or other observable measures the second question has received more attention in the literature most studies of access to nursing home care for example reschovsky 1996 ettner 1993 and gertler 1992 presume the presence of a facility and ask to what extent prospective residents have access to the facility often focusing on individuals covered by medicaid relatively fewer focus on issues of access in isolated markets yu and bradford 1995 is an exception while this study limits its focus to the first question by analyzing isolated rural markets in the united states the methods used here in principle can be extended to focus on the second question as well in focusing on the question of access this analysis abstracts from potential differences in quality across organizational forms deferring to existing studies on the subject including grabowski and hirth 2003 hirth 1999 chou 2002 holtmann and ullmann 1991 and weisbrod 1988 the question of whether nonprofits enter unprofitable geographic markets has not been previously addressed in the nursing home industry or elsewhere the study closest in spirit to the present one is the analysis of nonprofit and for profit hospital location by norton and staiger 1994 in which the authors conclude that for profits tend to locate in better insured areas that is areas that are more likely to be more profitable than nonprofits do this study differs from norton and staiger in that it explicitly calculates market profitability for markets that for profits have entered and projects it for markets that for profits have not entered this analysis also complements the work of kapur and weisbrod 2000 by assessing whether government nursing homes serve unprofitable markets while their paper addressed the question of whether government nursing homes serve unprofitable patients

entry in monopoly market this paper develops new empirical models of market concentration from game theoretic models of entry we construct our models from inequality conditions that describe entrants equilibrium strategies in simultaneous move and sequential move games and use them to study the effects of entry in isolated monopoly markets for new automobiles from estimates of the market size necessary to support one and two dealers we conclude that monopoly dealers do not block the entry of a second dealer we also find that entry does not cause price cost margins to fall by much

diversification and value at risk a pervasive and puzzling feature of banks value at risk var is its abnormally high level which leads to excessive regulatory capital a possible explanation for the tendency of commercial banks to overstate their var is that they incompletely account for the diversification effect among broad risk categories e g equity interest rate commodity credit spread and foreign exchange by underestimating the diversification effect bank s proprietary var models produce overly prudent market risk assessments in this paper we examine empirically the validity of this hypothesis using actual var data from major us commercial banks in contrast to the var diversification hypothesis we find that us banks show no sign of systematic underestimation of the diversification effect in particular diversification effects used by banks is very close to and quite often larger than our empirical diversification estimates a direct implication of this finding is that individual vars for each broad risk category just like aggregate vars are biased risk assessments

two sided coherent risk measures and their application in realistic portfolio optimization by using a different derivation scheme a new class of two sided coherent risk measures is constructed in this paper different from existing coherent risk measures both positive and negative deviations from the expected return are considered in the new measure simultaneously but differently this innovation makes it easy to reasonably describe and control the asymmetry and fat tail characteristics of the loss distribution and to properly reflect the investor s risk attitude with its easy computation of the new risk measure a realistic portfolio selection model is established by taking into account typical market frictions such as taxes transaction costs and value constraints empirical results demonstrate that our new portfolio selection model can not only suitably reflect the impact of different trading constraints but find more robust optimal portfolios which are better than the optimal portfolio obtained under the conditional value at risk measure in terms of diversification and typical performance ratios

comparative performances of measures of consumer and economic sentiment in forecasting consumption a multi country analysis this paper seeks to compare the capabilities of assorted measures of consumer and economic sentiment in predicting the growth of household expenditure an analysis of quarterly data on five europea

set identification in models with multiple equilibria we propose a computationally feasible way of deriving the identified features of models with multiple equilibria in pure or mixed strategies it is shown that in the case of shapley regular normal form games the identified set is characterized by the inclusion of the true data distribution within the core of a choquet capacity which is interpreted as the generalized likelihood of the model in turn this inclusion is characterized by a finite set of inequalities and efficient and easily implementable combinatorial methods are described to check them in all normal form games the identified set is characterized in terms of the value of a submodular or convex optimization program efficient algorithms are then given and compared to check inclusion of a parameter in this identified set the latter are illustrated with family bargaining games and oligopoly entry games copyright 2011 oxford university press

investment and usage of new technologies evidence from a shared atm network when new technologies become available it is not only essential that firms have the correct investment incentives but often also that consumers make the proper usage decisions this paper studies investment and usage in a shared atm network be cause all banks coordinate their atm investment decisions there is no strategic but only a pure cost saving incentive to invest at the same time because retail fees for cash withdrawals are regulated to zero at both branches and atms consumers may not have the proper incentives to substitute their transactions from branches to the available atms we develop an empirical model of coordinated investment and cash withdrawal demand where banks choose the number of atms and consumers decide whether to withdraw cash at atms or branches we find that banks substantially underinvested in the shared atm network and thus provided too little geographic coverage this contrasts with earlier findings of strategic overinvestment in networks with partial incompatibility furthermore we find that consumer usage of the avail able atm network is too low because of the zero retail fees for cash withdrawals at branches a direct promotion of investment through subsidies or other means can improve welfare but the introduction of retail fees on cash withdrawals at branches would be more effective even if this does not encourage investment per se

willingness to consume and ability to consume abstract george katona 1960 introduced the distinction between ability to buy and willingness to buy ability to buy refers to the objective factors determining actual purchases whereas willingness to buy captures subjective factors such as attitudes or moods i show that katona s theory can be reconciled easily with standard models of intertemporal utility maximization if one allows for a time varying preference parameter that is exogenous to the consumer and determined by the social environment such a willingness to consume model is tested against standard alternatives using data from seven european countries the empirical evidence rejects the permanent income hypothesis and supports the willingness to consume model

entry donor market size and competitive conduct among nonprofit firms abstract this paper empirically characterizes competitive behavior among charitable nonprofits where prices and output are difficult to observe using a model tailored to donative nonprofits and an empirical methodology that exploits cross sectional variation in market size and various measurable demographic and cost characteristics applicable for nonprofits this paper estimates the threshold number of potential donors required for nonprofit economic viability in five major charitable sectors we find that our sample markets generally reach competitive levels once five or more nonprofits in a given nonprofit sector are observed the paper offers several possible interpretations of these findings and directions for future research

collective action and constraints on repression at the endgame how can human rights abuses be prevented or reduced using a simple game theoretic model we demonstrate that repression can become a coordination game when the potential for abuses is greatest when dissent against a regime has grown sufficiently powerful in such scenarios repression depends on how the leader s agents coordinate on implementing a repression order if and to the extent agents believe other agents will not comply with an order to repress leaders can expect agents to disobey orders and will be less likely to order repression this logic of expectations constitutes a third mechanism for constraining repression in addition to sanctioning i e the logic of consequences and normative mechanisms i e the logic of appropriateness we formally explore how the logic of expectations can constrain the implementation of repression and also show that the logic of expectations has the greatest potential to constrain repression in middle regimes or anocracies in turn this has broader implic

how store format choices and market structure affect agglomeration economies and competition among chain stores in the us supermarket industry this article studies how store format choices and market concentration affect agglomeration economies and competition among chain stores using data on supermarket chains in arizona georgia and il

can households see into the future survey evidence from the netherlands abstract this paper presents new evidence on the expectation formation process from a dutch household survey households become too optimistic about their future income after their income has improved consistent with the overextrapolation of their experience we show that this effect of experience is persistent and that households overextrapolate income losses more than income gains furthermore older households overextrapolate more suggesting that they did not learn over time to form more accurate expectations finally we study the relationship between expectation errors and consumption we find that more overoptimistic households intend to consume more and subsequently report higher consumption even though they do not consume as much as they intended to these results suggest that overextrapolation hurts consumers and amplifies business cycles

a dynamic model of entry and exit in a growing industry the potential demand in a new industry evolves over time demand is initially low but advertising by the industry s early entrants can speed up demand growth however there is intrinsic uncertainty of the demand level in each period and uncertainty of the demand evolution path which can be affected by the underlying economic environment we construct a dynamic model that features the stochastically and endogenously expanding demand of a new industry and we investigate the optimal entry and exit behavior of firms as the industry evolves we find that firms incentive to enter early depends critically on the cost that early entrants have to pay in developing the market when the cost is high and the benefit spills over to potential entrants firms have an incentive to wait and the probability of entry can increase with the number of incumbents under certain circumstances firms entry strategy is also influenced by the transition of economic states firms are more likely to enter under a state that shows the prospect of demand taking off soon we also find that in the early stage of an industry higher demand uncertainty can induce faster entry

how loss averse are investors in financial markets abstract we investigate loss aversion in financial markets using a typical asset allocation problem our theoretical and empirical results show that investors in financial markets are more loss averse than assumed in the literature moreover loss aversion changes depending on market conditions investors become far more loss averse during bull markets than during bear markets indicating their more profound disutility for losses when others enjoy gains contrary to most previous results we find that investors are more sensitive to changes in losses than changes in gains

the industrial organization of health care markets the u s health care sector is large and growing health care spending in 2011 amounted to 2 7 trillion and 18 percent of gdp approximately half of health care output is allocated via markets in this paper we analyze the industrial organization literature on health care markets focusing on the impact of competition on price quality and treatment decisions for health care providers and health insurers we conclude with a discussion of research opportunities for industrial organization economists including opportunities created by the u s patient protection and affordable care act

expectations heterogeneous forecast errors and consumption micro evidence from the michigan consumer sentiment surveys the household data underlying the michigan index of consumer sentiment are used to test the rationality of consumer expectations and their usefulness in forecasting expenditure the results can be interpreted as characterizing the shocks that hit different types of households over time expectations are found to be biased and inefficient at least ex post people underestimated the disinflation of the early 1980s and the severity of recent business cycles people s forecast errors are also systematically correlated with their demographic characteristics in part because of time varying group level shocks further sentiment helps forecast consumption growth some of this rejection of the permanent income hypothesis is due to the systematic demographic components in forecast errors

asymmetric volatility spillovers between uk regional worker flows and vacancies this paper investigates volatility spillovers between uk regional job finding job separation and vacancy rates employing a large bayesian logistic smooth transition vector autoregression var model we find high volatility spillovers between uk regional labour markets analyses of net spillovers show that in general shocks to job separation rates tend to spread into job finding and vacancy rates while vacancy rates are usually at the receiving end of shocks transmitted from the job separations and job findings to shed further light on the shock propagation mechanism we also look into more detailed matters such as the differences in spillovers between regions within the same regime and that of the same region but in different regimes

evaluating threshold effects in consumer sentiment 1 introductionthe consumer sentiment index published by the university of michigan hereafter the um index is one of the two most commonly monitored measures of consumer sentiment in the united states the other one being the consumer confidence index issued by the conference board sentiment indexes which are constructed from answers to survey questions are popular with the media newspaper articles and commentaries abound following their release the analysis often confers a primary role to consumer sentiment in determining economic fluctuations the view among economists however is more equivocal as early as 1965 adams and green found that the information contained in the um index encompasses the information included in standard government statistics on employment and financial conditions many economists think that consumer sentiment is endogenous and is a reflection of current macroeconomic conditions other economists in line with keynes notion of animals spirits argue that psychological factors which are not captured by economic variables can influence consumers decisions thus the willingness to consume may be an important factor affecting consumption few studies have found that sentiment indexes have significant explanatory power once fundamental economic factors are taken into account garner 1991 and throop 1992 however performed event studies and suggested that these indexes could be helpful during major economic or political events as they then tend to diverge from a path consistent with other macroeconomic variables drawing on this literature our study provides a new evaluation of consumer sentiment as a predictor of aggregate consumer spending periods of high economic or political uncertainty are usually associated with increased volatility of consumer sentiment suggesting that large swings in sentiment could influence consumption we provide a formal assessment of this possibility by estimating a consumption function in which only large variations of sentiment affect spending we find that consumer sentiment is a statistically important determinant of consumption in periods of high uncertainty even after controlling for other determinants of consumption this article is organized as follows section 2 describes two views of consumer behavior section 3 reviews the relevant empirical literature section 4 introduces our econometric model data and estimation methods section 5 summarizes the estimation and forecasting results section 6 evaluates the predictive power of the um index within the campbell mankiw campbell and mankiw 1990 framework section 7 concludes 2 theorythis section briefly reviews the theory of consumer behavior and discusses possible links to consumer sentiment the permanent income hypothesis pih states that consumers expenditures depend on their permanent income permanent income is defined as the present value of wealth formula omitted see article image where at is the real value of the individual s nonhuman wealth at the beginning of period t is the discount factor ylt is real disposable labor income and et is the expectation operator conditional on information available to the individual at time t campbell and mankiw 1990 test hall s 1978 random walk hypothesis by separating consumers into two groups a proportion of households rule of thumbers simply set consumption equal to income in each period while a fraction 1 life cyclers behave according to the pih in this framework the only reason any lagged variable could have predictive power for current consumption growth is because that variable has predictive power for current income growth and the consumers do not spend that income until it arrives in that context the usefulness of consumer sentiment should come from the fact that it captures information about expected future income

consumption sentiment and economic news this paper investigates the influence of economic news on consumer sentiment and examines whether news shocks changes in coverage that would not be expected from incoming data on economic fundamentals have aggregate effects using monthly u s data and a structural vector autoregression i find that 1 sentiment is affected by news shocks 2 after filtering out effects of news shocks shocks to sentiment still have positive effects on consumer spending and 3 news shocks influence both spending and unemployment in significant though transitory ways these results are consistent with other evidence of a role of nonfundamental factors in aggregate fluctuations jel e21 e32 d12

the determinants of uk business cycles this paper considers the causes of post war uk business cycles using an extended stochastic growth model we construct estimates of productivity and preference shocks both of which are highly persistent volatile and potentially capable of explaining uk business cycles we find the productivity term is the dominant explanation of uk output fluctuations but our estimated preference shift is crucial in understanding employment movements a variety of granger causality tests establish whether these productivity and preference terms are unpredictable and so can be potentially considered as the cause of uk business cycles or whether they are themselves granger caused by other variables the aim of business cycle theory is to identify the causes of business cycles and outline the various propagation mechanisms through which these produce cyclical fluctuations the purpose of this paper is to study the former using uk data we investigate the main sources of uk post war business cycles our aim in doing so is to discriminate between competing theories of the business cycle as well as to increase our understanding of particular episodes of uk post war economic history to achieve this aim we focus on two fundamental sources of business cycle fluctuations productivity shocks and a preference shift or more generally a supply and demand shock we choose these because i they can be easily calculated using only published data avoiding the need for any econometric identification assumptions ii they represent the simplest extension to the neoclassical stochastic growth model which can explain observed uk business cycle patterns they therefore form a natural benchmark with which to assess prescott s 1986 claim that this model can account for both growth and business cycles however while our main focus is on these two shocks our methodology is broad enough to allow for a wide range of potential causes of uk business cycles in section 1 of the paper we outline some stylised facts of the uk business cycle and motivate more rigorously our focus on productivity and preference shocks in section 2 we provide estimates of these shocks discuss their univariate properties and examine their correlation with key business cycle variables we find both shocks to be very volatile and persistent with the productivity variable accounting for a large proportion of output fluctuations and preference shifts more important in explaining employment movements simulations show that in combination with a neoclassical growth model these shocks are capable of matching uk business cycles however if

the impact of conventional and unconventional monetary policy on expectations and sentiment abstract this paper offers evidence on the effect of ecb s conventional and unconventional monetary policy on economic expectations in euro area countries during the us and eu crisis we employ a range of research methodologies in a sample of nine eurozone countries and combine expectations sentiment indicators with a set of macroeconomic and financial variables we find that ecb s conventional monetary policy and fed s monetary policy stance has a positive and significant effect on economic expectations for core eurozone countries and a weak effect on peripheral eurozone countries ecb s unconventional policy measures however have a negative short term effect on core countries economic expectations this result is robust to different methodologies pvar qvar favar and different datasets overall our findings highlight the importance of monetary policy in the determination of economic expectations

pricing and market concentration in oligopoly markets this paper investigates the relationship between prices and market concentration in the auto rental industry we assemble an original database that includes the number of auto rental operators and other exogenous demand and cost conditions at every commercial airport in the country the data are interesting because we observe a large variation in market structure ranging from more than 100 monopoly and duopoly markets to several competitive airports with more than eight firms in addition we collect daily rental prices in each market that are regressed against the number of operating firms and other control factors due to potential biases in treating market participants as exogenously assigned we employ a two stage estimation procedure in which an equilibrium model of endogenous market structure provides correction terms for the second stage price regression results show that ignoring the endogeneity of market structure severely underestimates the impact of additional competitors on prices with the

can consumer confidence forecast household spending evidence from the european commission business and consumer surveys 1 introductionthe analysis of the impact of consumer attitudes on consumer spending has been an area of sustained interest in the macroeconomics literature this interest in consumer attitudes reflects a popular belief that macroeconomic outcomes depend heavily on consumers expectations of future economic conditions reinforcing this belief is the fact that consumer spending accounts for 60 to 70 of the gross domestic product of highly industrialized countries such as the g 7 during the past few decades a number of single country investigations have attempted to assess the predictive power of consumer confidence in forecasting household spending for example in the united states mishkin 1978 reports that the index of consumer sentiment ics published by the university of michigan possesses good explanatory power for changes in durable goods carroll fuhrer and wilcox 1994 also find that the michigan ics has good predictive capability with regard to household expenditure but that its forecasting power decreases considerably when the index is used along with other macroeconomic variables 1 kwan and cotsomitis 2004 examine the robustness of carroll fuhrer and wilcox s 1994 findings when alternative measures of consumer confidence are used in their prediction equations they report that use of the michigan index of consumer expectations improves on the estimation results of carroll fuhrer and wilcox 1994 bram and ludvigson 1998 and ludvigson 2004 compare the forecasting performance of the michigan ics and the u s conference board s index of consumer confidence icc their findings indicate that the conference board s index provides additional information about future consumer consumption that is not captured by the michigan index however chopin and darrat 2000 utilizing a multivariate causality framework report that the conference board s icc is an unreliable predictor of u s retail sales as regards other studies using non u s data acemoglu and scott 1994 employ granger causality and regression analyses to determine if consumer confidence as measured by the gallup poll in the united kingdom can predict future consumption they find that consumer confidence is a leading indicator of future consumption growth in a subsequent study delorme kamerschen and voeks 2002 examine whether consumer confidence and rational expectations are the same in the united kingdom as they are in the united states they report that the predictive ability of the u k consumer confidence index is greater than that of the united states belessiotis 1996 using french data also reports that the consumer confidence index provides decent explanatory power for future consumer spending in canada kwan and cotsomitis 2005 find that although consumer sentiment is a reliable predictor of consumer expenditures at the national level results obtained using regional data are quite mixed fan and wong 1998 find that unlike the case in the united states or the united kingdom confidence indicators in hong kong have little or no explanatory power in forecasting household spending the existing studies on the ability of consumer confidence to predict household spending have produced mixed results the results vary depending on the sample period chosen the frequency of observations monthly or quarterly and the different survey methodologies employed to gauge consumer attitudes moreover most of these studies confine their attention to single country investigations given the diversity of results it is important to investigate the predictive power of consumer confidence on the basis of comparable time series data for as many countries as possible this paper presents a first formal attempt to study the ability of consumer confidence to forecast household spending within a multicountry framework to this end we use two confidence indices namely the consumer confidence indicator cci and the economic sentiment indicator esi both of which are derived from the european commission business and consumer survey ecbcs

var seductive but dangerous value at risk var has gained rapid acceptance as a valuable approach to risk management not all vars are equal however a study of var techniques used by dealers and end users reveals that var calculations differ significantly for the same portfolio vars are extremely dependent on parameters data assumptions and methodology calculation of eight common vars for three hypothetical portfolios demonstrates the potentially seductive but dangerous nature of any single approach to risk management in sum although var and other quantitative techniques are necessary aspects of an effective risk management program they are not sufficient to control risk

estimation of a model of entry in the airline industry this paper considers the effect of an airline s scale of operation at an airport on the profitability of routes flown out of that airport the empirical methodology uses the entry decisions of airlines as indicators of underlying profitability the results extend the empirical literature on airport presence by providing a new set of estimates of the determinants of city pair profitability these estimates imply that city pair profits increase in airport presence and decrease rapidly in the number of entering firms the literature on empirical models of oligopoly entry is also extended via a focus on the role of differences between firms

consumer confidence and economic activity a factor augmented var approach abstractthis study aims to analyse the effects of the consumer confidence on economic activity for the us market we use the empirical factor augmented vector autoregression favar method which enables us to incorporate a wide range of economic activity factors into the analysis the consumer confidence index cci is chosen as the principal variable that is presumed to represent the degree of optimism on the state of economic activity the results show that consumer confidence and economic activity are strongly correlated for manufacturing related factors such as industrial production and inventories we also observe strong relation among cci and personal consumption expenditures as well as housing market variables

collusive conduct in duopolies multimarket contact and cross ownership in the mobile telephone industry the deregulation of the telecommunications industry has resulted in a variety of industry structures which have been created in hopes of increasing competition one example is the licensing of cellular telephone services in the united states where the fcc created duopolies in which two firms were granted licenses to compete in strictly defined product and geographic markets taking advantage of the unique regulatory environment we test to what degree duopolistic competition leads to competitive market outcomes we find that cross ownership and multimarket contact are important factors in explaining non competitive prices

competition in large markets this paper develops a simple and robust implication of free entry followed by competition without substantial strategic interactions increasing the number of consumers leaves the distributions of producers prices and other choices unchanged in many models featuring non trivial strategic considerations producers prices fall as their numbers increase hence examining the relationship between market size and producers actions provides a nonparametric tool for empirically discriminating between these distinct approaches to competition to illustrate its application i examine observations of restaurants seating capacities exit decisions and prices from 224 u s cities given factor prices and demographic variables increasing a city s size increases restaurants capacities decreases their exit rate and decreases their prices these results suggest that strategic considerations lie at the heart of restaurant pricing and turnover

an empirical model of firm entry with endogenous product type choices i describe a model of entry with endogenous product type choices these choices are formalized as the outcomes of a game of incomplete information in which rivals differentiated products have nonuniform competitive effects on profits i estimate the model for location choices in the video retail industry using a nested fixed point algorithm solution the results imply significant returns to product differentiation simulations illustrate the tradeoff between demand and intensified competition and the extent to which markets with more scope for differentiation support greater entry

contestable markets an uprising in the theory of industry structure presents a transcript of the presidential address delivered at the 94th meeting of the american economic association on december 29 1981 discussion of developments in the theory of industry structure welfare attributes of contestable markets behavior characteristics of oligopoly equilibrium intertemporal vulnerability to inefficient entry ebsco

predation reputation and entry deterrence abstract economists often argue that predatory practices are irrational since there exist cheaper or more certain means to gain or maintain a monopoly our gametheoretic equilibrium analysis suggests that if a firm is threatened by several potential entrants then predation may be rational against early entrants even if it is costly when viewed in isolation because it yields a reputation which deters other entrants asymmetric information plays a crucial role in our analysis since it provides the rationale for entrants to base their expectations of the firm s future behavior on its past actions the analysis also suggests methods to treat general reputational phenomena

psychology consumer sentiment and household expenditures the aim of this article is to assess the role of the italian consumer sentiment index csi as an autonomous driving force of consumption decisions we test for the presence of rule of thumb consumers as originally proposed by campbell and mankiw 1991 using sentiment measures distinguished by respondent s working condition and consumption data disaggregated according to durability over the period 1982 2004 the consumption sentiment relationship is found to be stronger for some groups of households and for some particular categories of expenditures moreover sentiment seems to be not well explained by economic fundamentals alone capturing also the effects of the political cycle and exceptional circumstances

institutional and individual investors saving for old age this paper brings together the academic literature on individual and institutional investors in order to understand the nature of difficulties faced by them and set the background for the special issue this introductory article and the papers in the special issue contribute to the debate on how to support individuals in their savings commitments and investment decision making and whether and how institutional investors have fulfilled their role in supporting the development of the funded pension industry there are three main conclusions i individual investors are not ready for the role that has been assigned to them in the pension industry ii institutional investors are a long way short of establishing healthy relational contracts and trustworthy relationships with their clients and iii more effective regulation may be needed

entry industry growth and the microdynamics of industry supply entry is widely discussed but rarely subjected to empirical study this study develops a competitive theory of entry with primary focus on the relationship between entry and industry growth the main ingredients are adjustment costs to firms already in the industry and the distribution of fixed entry cost to potential entrants the theory suggests sufficient conditions under which the entry rate is an increasing convex function of the industry growth rate a regression model correcting for severe heteroscedasticity is applied to data from swedish manufacturing industries the results are consistent with the theoretical prediction for growth and other key variables expected to influence entry significantly

the number of firms and production capacity in relation to market size many oligopoly theories predict a positive correlation between market size and the equilibrium number of firms and some also imply that competition is more intense in larger markets we test these predictions on a sample of driving schools in 250 swedish regional markets by estimating the relation between the number of firms production capacity and market size the number of firms increases less than proportionally with market size market size per capacity unit is smaller in large markets since firms produce a fairly homogenous good we argue that this is evidence that profits per capita is decreasing in market size

reply on comment to small firms and the merger mania research on performance differences between small and large firms is booming it emerges relatively separated from the mainstream industrial organization literature inspired by levy s comment on an earlier paper we try to bridge the gap between the two areas especially we screen non cooperative game theoretical models for predictions on performance differences most of them forecast higher profits for larger firms but there exist also some models which predict the opposite for very specific circumstances

local financial development and growth using a unique sample of net domestic product data for districts in india i investigate the connection between banking sector development human capital and economic growth at the sub national level using disaggregate data avoids many of the omitted variable problems that plague cross country studies of the finance growth connection and facilitates an instrumentation strategy the findings show that the growth of many districts in india is financially constrained due to lack of banking sector development and that the relationship between finance and growth may be non linear for the districts in the sample moving from the 75th percentile of credit net domestic product to the 25th percentile implies an average loss of 4 percent in growth over the 1990s this indicates that the gains from increased banking sector outreach may be large the analysis shows that human capital deepening can reduce the effect of the financial constraint and help decouple growth from financial development in a district at the 25th literacy percentile the implied growth loss due to a constrained banking sector is twice as large as in a district at the 75th literacy percentile thus higher levels of human capital may activate alternative growth and production channels that are less finance intensive

turns in consumer confidence an information advantage linked to manufacturing this research shows that the manufacturing sector contains private information advantages for consumer confidence it examines the consumer confidence manufacturing link by comparing the u s national level index of consumer sentiment with identically constructed confidence indices from a key manufacturing state and a nonmanufacturing state granger causality analysis shows that the manufacturing state s confidence index leads the national index whereas the nonmanufacturing state s confidence index lags it factors influencing confidence include percentage manufacturing employment equity markets indicators and disposable income fitting a consumption function to confidence measures for the three confidence indices shows the strongest relationship to be in the manufacturing state jel d12 copyright 2006 oxford university press

network effects market structure and industry performance abstract this paper analyzes oligopolistic markets with network externalities exploiting a minimal complementarity structure on the model primitives that allows for pure network goods we prove existence of non trivial fulfilled expectations equilibrium we formalize the concept of industry viability investigate its determinants and show that it improves with more firms in the market and or by technological progress these results enlighten some well known conclusions from case studies in the management strategy literature we also characterize the effects of market structure on industry performance which depart substantially from ordinary markets the approach relies on lattice theoretic methods supplemented with basic insights from nonsmooth analysis

growth trends cyclical fluctuations and welfare with non expected utility preferences abstract using standard time separable discounted expected utility eu models lucas models of business cycles 1987 and others argue that growth trends have a crucial and cyclical fluctuations a trivial effect on individuals utility these conclusions are drastically altered if instead non eu preferences are assumed

the relation between firm growth and q with multiple capital goods theory and evidence from panel data on japanese firms we derive from a model of investment with multiple capital goods a one to one relation between the growth rate of the capital aggregate and the stock market based q we estimate the growth q relation using a panel of japanese manufacturing firms taking into account the endogeneity of q identification is achieved by combining the theoretical structure of the q model and an assumed serial correlation structure of the technology shock which is the error term in the growth q equation for early years of our sample cash flow has significant explanatory power over and above q the significance of cash flow disappears for more recent years for the heavy industry when japanese capital markets was liberalized the estimated q coefficient implies that the adjustment cost is less than a half of gross profits net of the adjustment cost

beyond sharpe ratio optimal asset allocation using different performance ratios abstract as the assumption of normality in return distributions is relaxed classic sharpe ratio and its descendants become questionable tools for constructing optimal portfolios in order to overcome the problem asymmetrical parameter dependent performance ratios have been recently proposed in the literature the aim of this note is to develop an integrated decision aid system for asset allocation based on a toolkit of eleven performance ratios a multi period portfolio optimization up covering a fixed horizon is set up at first bootstrapping of asset return distributions is assessed to recover all ratios calculations at second optimal rebalanced weights are achieved at third optimal final wealth is simulated for each ratios eventually we make a robustness test on the best performance ratios empirical simulations confirm the weakness in forecasting of sharpe ratio whereas asymmetrical parameter dependent ratios such as the generalized rachev sortino satchell and farinelli tibiletti ratios show satisfactorily robustness

preemption and rent equalization in the adoption of new technology we study the adoption of a new technology to illustrate the effects of preemption in games of timing we show that the threat of preemption equalizes rents in a duopoly but that this result does not extend to the general oligopoly game if the gain to preemption is sufficiently small then the optimal symmetric outcome which involves late adoption is an equilibrium this contrasts with reinganum s result that in precommitment equilibria there must be diffusion we develop a new and richer formalism for modeling games of timing which permits a continuoustime representation of the limit of discrete time mixed strategy equilibria

on the effects of entry in cournot markets in the framework of symmetric cournot oligopoly this paper provides two minimal sets of assumptions on the demand and cost functions that imply respectively that as the number of firms increases the minimal and maximal equilibria lead to i decreasing industry price and increasing or decreasing per firm output and ii increasing industry price and decreasing per firm output in both cases per firm profits are decreasing the analysis relies crucially on lattice theoretic methods and yields general unambiguous and easily interpretable conclusions of a global nature as a byproduct of independent interest new insight into existence of cournot equilibrium is developed

consumer confidence and rational expectations in the united states compared with the united kingdom this paper examines the relationship between consumer confidence and the rational expectations permanent income hypothesis in the usa and compares the results with those obtained for the uk the study expands previous analysis by defining consumption as motor vehicles goods excluding motor vehicles and services the results suggest that predictive ability of the usa s consumer confidence is less than that of the uk but that contrary to the uk study confidence does not predict future consumption growth of services and is therefore consistent with rational expectations permanent income hypothesis

rationalizability learning and equilibrium in games with strategic complementarities we study a rich class of noncooperative games that includes models of oligopoly competition macroeconomic coordination failures arms races bank runs technology adoption and diffusion r d competition pretrial bargaining coordination in teams and many others for all these games the sets of pure strategy nash equilibria correlated equilibria and rationalizable strategies have identical bounds also for a class of models of dynamic adaptive choice behavior that encompasses both best response dynamics and bayesian learning the players choices lie eventually within the same bounds these bounds are shown to vary monotonically with certain exogenous parameters we study the class of noncooperative supermodular games introduced by topkis 1979 and further analyzed by vives 1985 1989 who also pointed out the importance of these games in industrial economics supermodular games are games in which each player s strategy set is partially ordered the marginal returns to increasing one s strategy rise with increases in the competitors strategies so that the game exhibits strategic complementarity 2 and if a player s strategies are multidimensional marginal returns to any one com ponent of the player s strategy rise with increases in the other components this class turns out to encompass many of the most important economic applications of noncooperative game theory in macroeconomics diamond s 1982 search model and bryant s 1983 1984 rational expectations models can be represented as supermodular games in each of these models more activity by some members of the economy raises the returns to increased levels of activity by others in oligopoly theory some models of bertrand oligopoly with differentiated products qualify as supermodu lar games in these games when a firm s competitors raise their prices the marginal profitability of the firm s own price increase rises a similar structure is present in games of new technology adoption such as those of dybvig and spatt 1983 farrell and saloner 1986 and katz and shapiro 1986 when more users hook into a communication system or more manufacturers adopt an interface standard the marginal return to others of doing the same often rises similarly in some specifications of the bank runs model introduced by diamond and dybvig 1983 when more depositors withdraw their funds from a bank it is more worthwhile for other depositors to do the same in the warrant exercise

bank panics government guarantees and the long run size of the financial sector evidence from free banking america governments attempt to increase the confidence of financial market participants by making implicit or explicit guarantees of uncertain credibility confidence in these guarantees presumably alters the size of the financial sector but observing the long run consequences of failed guarantees is difficult we look to america s free banking era and compare the consequences of a broken guarantee during the indiana centered panic of 1854 to the panic of 1857 in which guarantees were honored our estimates of a model of endogenous market structure indicate substantial negative long run consequences to financial depth when panics cast doubt upon a government s ability to honor its guarantees

the time varying volatility of earnings and aggregate consumption growth time varying specifications for the conditional variance of earnings of u s households are estimated with micro data over the period 1968 92 the cross sectional mean of the estimated time varying uncertainty of individual households has a significant impact on aggregate consumption growth as such aggregate precautionary savings may be more important than what is suggested by the results of estimating standard regression equations for aggregate consumption growth that incorporate only lagged income growth and the real interest rate the estimation of a buffer stock consumption model with time varying earnings uncertainty suggests that the precautionary savings motive is cyclical and has become less important in the 1980s

pension reform and saving in britain the paper examines the pension programme in britain focusing on reforms that have increased the fraction of the work force opting out of public provision and that have permitted individuals to choose their private pension provider it also examines the issue of pension provision and household saving the paper highlights the disparities in retirement saving behaviour across types of pension provision and different households the paper discusses the policy issues of the adequacy of household saving and the impact of pension reform on household saving and the public finances

competition and structure in serial supply chains with deterministic demand supply chains often consist of several tiers with different numbers of firms competing at each tier a major determinant of the structure of supply chains is the cost structure associated with the underlying manufacturing process in this paper we examine the impact of fixed and variable costs on the structure and competitiveness of supply chains with a serial structure and price sensitive linear deterministic demand the entry stage is modeled as a simultaneous game where the players take the outcomes of the subsequent post entry cournot competition into account in making their entry decisions we derive expressions for prices and production quantities as functions of the number of entrants at each tier of a multitier chain we characterize viability and stability of supply chain structures and show using lattice arguments that there is always an equilibrium structure in pure strategies in the entry game finally we examine the effects of vertical integration in the two tier case altogether the paper provides a framework for comparing a variety of supply chain structures and for studying how they are affected by cost structures and by the number of entrants throughout the chain

aggregation and imperfect competition on the existence of equilibrium we present a new approach to the theory of imperfect competition and apply it to study price competition among differentiated products the central result provides general conditions under which there exists a pure strategy price equilibrium for any number of firms producing any set of products this includes products with multi dimen sional attributes in addition to the proof of existence we provide conditions for uniqueness our analysis covers location models the characteristics approach and probabilistic choice together in a unified framework to prove existence we employ aggregation theorems due to prekopa 1971 and borell 1975 our companion paper caplin and nalebuff 1991 introduces these theorems and develops the application to super majority voting rules we present a new approach to the theory of imperfect competition and apply it to study price competition among differentiated products the central result is that there exists a pure strategy price equilibrium for any number of firms producing any set of products in addition to the proof of existence we provide conditions for uniqueness our model both unites diverse strands of the earlier literature and opens up uncharted areas for future analysis in particular we expand the traditional one dimensional framework to allow for multi dimen sional product differentiation our approach involves twin restrictions on consumer preferences one on individuals preferences the other on the distribution of preferences across society these are generalizations of the restrictions supporting 64 majority rule presented in caplin and nalebuff 1988 to prove existence we apply a new technique of aggregation this technique is valuable in a variety of other problems in the companion paper we use the aggregation result to generalize our earlier work on 64 majority rule and to characterize the relationship between the distribution of human capital and the distribution of income caplin and nalebuff 1991 there are additional applications in statistics and in search theory we begin with a brief review of the early literature on imperfect competition describing in more detail the existence problem and previous solutions section 3 presents our twin assumptions and shows that they cover many standard cases in section 4 we introduce the aggregation theorem and use it in the analysis of demand functions the proof of existence of equilibrium is in section

prices capacity and the entry decision a conditional logit analysis an understanding of what potential entrants consider in reaching an entry decision is important in assessing the validity of some rather fundamental hypotheses concerning the behavior of firms faced with an entry threat the reason is that such hypotheses are based on implicit assumptions concerning what influences the decisions of potential entrants if for example established firms deter entry by adjusting their prices as suggested by the limit pricing hypothesis then it must be true that prices in fact influence potential entrants 1 similarly if firms build capacity to deter entry as suggested recently by spence 8 then it must be true that observed capacity in fact influences the entry decision hence an examination of whether these considerations are important to potential entrants can be interpreted as a test of a necessary though not sufficient condition for the existence of these types of behavior on the part of established firms despite the significance of this question as a foundation upon which a number of important hypotheses concerning firm behavior rest few studies have attempted to estimate the relationship between the relevant market characteristics and the behavior of identifiable potential entrants the reasons for this are not hard to isolate price data of the type required is not generally available for most industries leaving untested the frequently debated relationship between pre entry market price and the entry decision also in the interindustry context in which empirical resesarch is usually conducted it is virtually impossible to account systematically for the differing levels of knowledge and experience among potential entrants and such differences may significantly influence the relative attractiveness of markets for entry thus any attempt to estimate the relationship between market characteristics and the entry decisions of individual potential entrants in the interindustry context will founder on the inability to account for the influence of knowledge and experience on the attractiveness of the potential entrant s choices this paper circumvents these problems by examining the relationship between market

does the buck stop here a comparison of withdrawals from money market mutual funds with floating and constant share prices recent reform proposals call for an elimination of the constant net asset value nav or buck in money market mutual funds to reduce the occurrence of runs outside the united states there are several countries that have money market mutual funds with and without constant navs using daily data on individual fund flows from these countries this paper evaluates whether the reliance on a constant nav is associated with higher fund redemptions the data suggest that funds with a constant nav experienced more negative net flows during the period of the run on the reserve primary fund even after controlling for measures of fund risk and risk aversion however i do not find convincing support for the hypothesis that the effect of sponsor strength on fund flows was stronger for constant nav money market funds