cooperative and noncooperative r d in duopoly with spillovers contrary to the usual assumption made in most oligopoly models relations among firms are seldom of a wholly cooperative or noncooperative type in many situations they compete in some fields while they cooperate in others an important example is the case of cooperative research efforts bringing fierce competitors together two types of agreement are observed first r d cooperation can take place at the so called precompetitive stage companies share basic information and efforts in the r d stage but remain rivals in the market place 1 a second type of agreement involves an extended collusion between partners creating common policies at the product level the usual justifications of this extension are the difficulties of protecting intellectual property the idea is then to allow partners who have achieved inventions together to also control together the processes and products which embody the results of their collaboration in order to recuperate jointly their r d investments 2 what could be expected from these types of agreement is a reduction in r d expenditures because of less wasteful duplication and a reduction of total production because of more reprinted from the american economic review 78 5 1133 1137 1988 center for operations research econometrics 1348 louvain la neuve belgium we are grateful to jean

permanent income hedonic prices and demand for housing new evidence abstract housing demand is examined by looking quite specifically at the income and price variables based on individual household data permanent and transitory incomes are computed through instrumental variables related to human and nonhuman wealth a price is constructed by spatially varying hedonic techniques separation of measured income into permanent and transitory components substantially improves the predictive power of the housing demand estimation and leads to demand elasticities of 1 and 1 with respect to permanent income and price the permanent income elasticity is roughly twice the measured income elasticity

emission taxes and optimal refunding schemes with endogenous market structure the purpose of this paper is to investigate optimal schemes for refunding the emission tax in a free entry market where the production process generates emissions we consider the regulation by a three part tax policy the government sets an emission tax a refunding scheme and an entry license tax in contrast to the case of the two part tax refund policy under no entry we show that even if it is impossible to obtain subsidies from outside the first best outcome is always attained further the government s budget constraint is binding under the optimal schemes our result implies that the tax refund system works effectively in a market with endogenous entry

content protection resource allocation and variable labour supply a three sector general equilibrium model is used to study the implications of an increase in content protection under the assumption of variable labor supply the role of variable labor supply is highlighted in the paper an increase in domestic content requirements increases the equilibrium labor supply which magnifies the policy effects on the output levels of agricultural manufacturing and intermediate goods and the imports of foreign intermediates furthermore the policy change may increase the national income of the economy while the national welfare is decreased

environmental policy under oligopoly with endogenous market structure emission taxes under both fixed number oligopoly and endogenous market structure which are the most relevant market structures for policy issues are examined in the latter case and contrary to what is expected under imperfect competition the optimal tax could exceed marginal external damages which implies that externalities generated by oligopolistic firms could be optimally controlled by overinternalizing environmental damages under endogenous market structure a scheme consisting of a license fee and a second best underinternalizing emission tax can increase social welfare as compared to the use of a single emission tax exceeding marginal damages copyright 1995 by the editors of the scandinavian journal of economics

competition in taxes and performance requirements for foreign direct investment abstract tax incentives offered to attract firms engaged in foreign direct investment are often tied to performance requirements such as domestic content restrictions or adherence to environmental standards the tax competition literature has repeatedly shown that competition between municipalities for mobile firms tends to drive taxes to low levels one would expect a comparable result for burdensome performance requirements despite this the evidence suggests that while taxes have indeed been driven down performance requirements are as popular as ever we explain this seeming conundrum by showing that in the presence of spillovers binding performance requirements can act as a coordination device for firms in equilibrium municipalities choose performance requirements which maximize joint surplus from investment competition between municipalities then transfers this surplus to firms via tax subsidies

long run welfare effect of energy conservation regulation we investigate the long run effect of energy conservation regulation which forces firms to raise energy saving investment above the cost minimizing level if pigovian tax is imposed additional regulation always harms social welfare under perfect competition while it can improve welfare under imperfect competition our result under imperfect competition holds regardless of whether strategies are strategic substitutes or complements in contrast to direct entry regulation

the theory of domestic content protection and content preference this paper investigates the resource reallocation effected by content protection and content preference schemes under alternative assumptions regarding the definition of domestic content the number of intermediate goods and the market structure of the domestic intermediate good industry content protection is shown to be equivalent to a combination of more familiar commercial policies however the extent of application of these policies is determined endogenously by parameters of the production functions for intermediate and final goods a number of anomalous and undesirable outcomes that may result from content protection and content preference are discussed

price determinants of aboriginal art and its role as an alternative asset class abstract this paper analyzes auction results for over 4000 paintings by australian aboriginal artists to investigate determinants of prices in the aboriginal art market this is the first financial study of an indigenous art market and hedonic repeat sales and hybrid regression analyses find it shares price determinants with traditional art markets with price premia attached to artist name death painting size leading auction house and winter sale however aboriginal art s unique features significantly affect prices particularly works that use traditional aboriginal media and those with reputation affirming traits an aboriginal art index provides 6 6 annual return standard deviation 17 9 which is comparable to traditional asset classes and superior on a risk adjusted basis returns to aboriginal art are negatively correlated with returns from other assets and so it adds value to a diversified investment portfolio

housing careers life cycle and residential mobility implications for the housing market the concept of a housing career provides a useful way of integrating the residential mobility and filtering literatures in understanding the operation of the housing market using data from a survey in adelaide the paper examines these careers in terms of moves to and from both rental accommodation and home ownership it shows how the progression of households through the stock is influenced by the circumstances that prompt moves economic resources and stage in the family life cycle the results suggest that acceleration and postponement of advancement along housing careers provide the principal mechanisms by which household demand adjusts to available housing supply over the short term

the role of free entry in an oligopolistic heckscher ohlin model retaining the basic properties of the heckscher ohlin trade model namely free entry and exit fully integrated international commodity markets and the same number of sectors with that of factors the authors develop a two country model with cournot oligopoly in this economy factor price equalization and the standard heckscher ohlin theorem on comparative advantage hold between two countries which are identical except for size however autarkic prices are different even though the level of trade is zero under the free trade regime nevertheless free trade reduces the oligopoly price and increases welfare copyright 1995 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

a theory of interregional tax competition a general equilibrium model is constructed to study tax competition where local governments compete for capital by holding down property tax rates and public expenditure levels an exact definition of tax competition is provided and both the existence and nonexistence of tax competition are shown to be theoretically possible it is argued however that tax competition must occur under empirically reasonable conditions inefficiency in public production is also explicitly modeled the amount of capital used to produce a given level of public service output is shown to be greater than that which is required to minimize costs evaluated at the prices facing private firms

housing markets consumption and financial liberalisation in the major economies abstract this paper analyses the implications of relaxing credit restrictions in housing finance markets a theoretical model of the interaction of financial and housing markets and forward looking agents is developed the effects of financial liberalisation in the model are analysed and evidence from the u s a and u k on the impact of easing credit restrictions is presented estimates are also made of the degree to which credit restrictions may bind on households in those countries where the range of mortgage products on offer is still more limited than in the u k and u s a simulations are undertaken to gauge the effect on consumption saving and bequests of wealth of possible future convergence in national systems of housing finance

foreign direct investment local content requirement and profit taxation we develop a partial equilibrium model of foreign direct investment fdi in which identical foreign firms locate themselves in a host country to compete in an oligopolistic market for a non tradeable commodity the host country assumed to be small in the market for fdi makes use of two instruments viz a profit tax and a local content requirement to compete for fdi in the international market we assume the existence of unemployment in the host country the structure of optimal instruments and their relationship to the number and the relative efficiency levels of the domestic firms are established

interaction between housing prices and household borrowing the finnish case abstract employing time series econometrics this study shows that there has been a significant two way interaction between housing prices and housing loan stock in finland since the financial liberalization in the late 1980s before the financial deregulation the interaction was substantially weaker furthermore housing appreciation has a notable positive impact on the outstanding consumption loan stock it appears that there is no similar relationship between stock prices and credit understanding the two way interaction between housing prices and credit is of importance since the interdependence is likely to augment boom bust cycles in the economy and increase the fragility of the financial sector

an analysis of household mobility and tenure choice an empirical study of korea abstract this paper develops a model of households joint mobility tenure decisions which improves upon the sole existing model in two important ways first the probabilistic structure is appropriately framed to capture the simultaneity of the mobility and tenure decisions second the model is based more directly on utility maximization theory an additionally distinguishing characteristic of the model is the fact that all independent variables in the estimation are expressed in flow terms this is done in an effort to more truly reflect their importance in the decision making of the household the model is estimated using microlevel data from korea the coefficients and derived elasticities are consistent with expectations and korean households are found to behave in a manner similar to that in the united states this suggests that the basic motivations underlying households mobility tenure decisions are invariant across countries

bidding for firms recently toyota sought a plant location in the united states the 800 million plant will employ 3000 workers and numerous states offered toyota generous investment incentives hoping this would induce toyota to select their state the commonwealth of kentucky won this competition but the price was high the present value of the payments exceeds 125 million the payment of investment incentives for the toyota plant is not unique in 1976 pennsylvania paid 75 million to attract a volkswagen plan nissan honda and mazda received generous investment incentives when locating plants in the united states and this bidding is not limited to states to attract the headquarters of the presbyterian church usa with its 1300 jobs and 38 million annual payroll civic leaders in louisville kentucky offered the church a warehouse and 6 2 million for renovation of the structure bidding the church away from kansas city missouri in this paper we contend that this competition may result from the average cost pricing of publicly provided goods and services 2 when the marginal cost of providing a firm and its workers with public services is less than the tax revenue they generate a government may offer the firm subsidies that reduce the distortions the average cost pricing of the public service creates thus this competition for industry is not a zero sum game where the subsidies are only transfers from the government to the firm rather these subsidies may facilitate the efficient location of industry

free entry and social inefficiency our goal is to provide a simple yet general exposition of the conditions under which the number of entrants in a free entry equilibrium is excessive insufficient or optimal our analysis compares the number of firms that enter a market when there is free entry with the number that would be desired by a social planner who is unable to control the behavior of firms once they are in the market that is we consider the second best problem of choosing the welfare maximizing number of firms while we take as given their noncompetitive behavior after entry we demonstrate that the crucial conditions for establishing the presence of an entry bias can be stated quite simply in terms of the outcome of the postentry game played by entrants in contrast to previous work we do not need to model this postentry game explicitly

race and tenure in toronto the analysis of a number of toronto sub populations consistently points to differences in the home ownership rates between visible minorities and whites people of african or caribbean origin have a much lower chance of being home owners compared to whites after controlling for differences in income levels housing preferences and household characteristics differences in tenure profiles are reduced at higher income levels but the home ownership deficit remains economic factors explain only a small part of the large difference cultural and institutional factors may determine how the tenure options are perceived and valued by different groups of people living in the same city biases in perceptions matter as they affect the extent to which people can gain from the direct and indirect subsidies offered to home owners the differences may be indicative of underlying problems some minorities face in gaining access to urban resources measures of home ownership deficits among the black and caribbean suggest

a new perspective on the ripple effect in the uk housing market comovement cyclical subsamples and alternative indices an alternative perspective is provided on the existence of a ripple effect in the uk housing market in contrast to previous studies the analysis involves consideration of information on the changes in house prices to which the hypothesis of house price diffusion posited by the ripple effect relates rather than their levels in an examination of changes in house prices in london relative to other regions of the uk directional forecasting methods are employed to establish the extent of the relationship between geographical proximity and comovement across the three month window provided by quarterly data consequently the analysis provides a direct examination of the ripple effect which refers to changes in prices rather than the convergence of levels which has become a feature of the empirical literature the literature is extended further by both the application of dating techniques to perform the analysis across cycles and phases of cycles recovery and recessionary periods in the uk housing market

the effects of a content requirement on a foreign duopsonist abstract this paper considers the operation of a local content requirement in a duopsony between domestic and foreign firms and demonstrates its consequences for the domestic producer of a final good it is shown that content protection may have perverse effects on a foreign firm s profits and may be welfare improving overall shifting profits from the domestic firm to both the foreign firm and domestic input producers

commitment efficiency and footloose firms the authors consider dynamic competition between a small number of local governments to attract a single large plant the surplus available in each location is unknown when the initial location decision is made two cases are considered if all agents can commit to second period actions and if they cannot without commitment initially the firm will discriminate against the region with the lower set up costs if first period productivity is low the firm may relocate and receive an ex post subsidy from a second region commitment decreases the expected total surplus and if fixed costs are small favors the firm copyright 1992 by the london school of economics and political science

tax competition and leviathan abstract attitudes towards downward pressure on tax rates from international tax competition depend on attitudes towards government this paper synthesises the two extremes which as in other areas of public finance have dominated the debate typically being presented as stark alternatives the view of government as a leviathan from which tax competition emerges as a useful constraint on policy makers and the view of government as a benevolent maximiser of their citizens welfare from which it emerges as a source of inefficiency conditions are derived under which when policy makers are neither entirely benevolent nor wholly self serving tax coordination benefits the representative citizen

speculative bubble spillovers across regional housing markets in this paper we determine whether speculative bubbles in one region in the united states can lead bubbles to form in others we first apply a regime switching model to determine whether speculative bubbles existed in the u s regional residential real estate markets our findings suggest that the housing markets in five of the nine census divisions investigated were characterized by speculative bubbles we then examine the extent to which bubbles spill over between neighboring and more distant regions finding that the transmission of speculative bubbles and nonfundamentals between regions is multidirectional and does not depend on contiguity or distance

the power to tax analytical foundations of a fiscal constitution preface 1 taxation in constitutional perspective 2 natural government a model of leviathan 3 constraints on base and rate structure 4 the taxation of commodities 5 taxation through time income taxes capital taxes and public debt 6 money creation and taxation 7 the disposition of public revenues 8 the domain of politics 9 open economy federalism and taxing authority 10 toward authentic tax reform prospects and prescriptions epilogue notes selected bibliography index

does collateral fuel moral hazard in banking this paper presents two models in which the fluctuating value of loan collateral real estate generates the problem of moral hazard between a bank and a deposit insurance agent the bank finances risky projects against collateral and relies on the rising collateral value if the collateral value later appreciates the bank enjoys handsome profits otherwise the bank fails the findings are rather consistent with the characteristics of the topical subprime mortgage crisis

profit taxation and the mode of foreign market entry abstract this paper studies the role of profit taxation for an international firm s decision upon how to penetrate a foreign market through exports or through foreign direct investment fdi and local supply we show that with harmonized taxes the international firm may choose fdi even though this has welfare costs from a global point of view with tax competition the host country can enforce exporting instead of fdi this leads to a nash equilibrium associated with higher world welfare than harmonized taxes thus because of the effect on entry mode tax competition provides heretofore unexplored benefits as compared to tax harmonization

asymmetric effects of the business cycle on bank credit risk abstract prior empirical research on the relation between credit risk and the business cycle has failed to properly investigate the presence of asymmetric effects to fill this gap we examine this relation both at the aggregate and the bank level exploiting a unique dataset on italian banks borrowers default rates we employ threshold regression models that allow to endogenously establish different regimes identified by the thresholds over below which credit risk is more less cyclical we find that not only are the effects of the business cycle on credit risk more pronounced during downturns but cyclicality is also higher for those banks with riskier portfolios

the equivalence of emission tax with tax revenue refund and emission intensity regulation abstract this study examines policies balancing emissions reduction and promotion of consumption we show the equivalence of emission intensity regulation coupled with tradable emission permits and the combination of an emission tax and refunding of the tax revenue to consumers

entry barriers and economic welfare the relationship between economic welfare and the number of firms in a quasi cournot market is examined in the first place we presuppose the existence of a strong first best government that can enforce the marginal cost principle to the firms along with regulating the number of firms it is shown that there exist excessive number of firms at the free entry quasicournot equilibrium vis a vis the first best welfare maximizing number of firms the thrust of this result essentially survives even if we replace a utopian first best government by a secondbest government that leaves the firms to pursue their respective profit maximization freely and engages solely in regulating the number of firms it can be shown that the excess entry prevails again in this second best world recent studies in the theoretical industrial organization literature have uncovered several instances which cast serious doubt on the reasonableness of a widespread belief that increasing competition will increase welfare stiglitz 1981 p 184 it has been shown that there are cases which are not altogether unreasonable where social welfare will be increased by strengthening rather than weakening the protection of incumbent firms from the threat of potential entry this is in sharp contrast with the traditional belief 2 what is not known however is how robust these pathologies in fact are we intend to settle this problem by proving two excess entry theorems in the quasi cournot parametric conjectural variations homogeneous oligopoly model seade 1980a b in the first place we presuppose the existence of a strong first best government that could costlessly enforce the marginal cost pricing principle by firms in an oligopolistic market and regulate entry in pursuit of first best social welfare optimization it is shown that the number of firms at the free entry equilibrium exceeds the first best welfare optimizing number of firms the result has already been noted by von weizsacker 1980a b and others in terms of numerical examples our theorem 1 asserts that this phenomenon always holds true for the family of quasi cournot models at hand an implication of this result is that the existence of entry barriers which protect incumbent firms from potential competitors is not necessarily welfare decreasing in sharp contrast with the traditional belief a problem remains with theorem 1 however in that an omnipotent first best government does not exist in reality and the first best ideal is unrealizable in the actual economy therefore even if the intervention by a first best government with a view to restricting the number of firms within an industry may be welfare improving it does

pigou tiebout property taxation and the underprovision of local public goods abstract pigou s proposition that the use of distorting taxes rather than neutral head taxes reduces public service levels is examined in this paper a simple model with a national system of competing local governments is utilized to demonstrate that the use of a distorting property tax on mobile capital decreases the level of residential public services the case where public services are an intermediate producer good is also considered

exclusive vs independent agents a separating equilibrium approach abstract we provide a separating equilibrium explanation for the existence of the independent insurance agent system despite the potentially higher costs of this system compared to those of the exclusive agents system or direct underwriting a model is developed assuming asymmetric information between insurers and insureds the former do not know the riskiness of the latter we also assume that the claims service provided by the independent agent system to its clients is superior to that offered by direct underwriting system that is insureds using the independent agent system are more likely to receive reimbursement of their claims competition compels the insurers to provide within their own system the best contract to the insured it is shown that in equilibrium the safer insureds choose direct underwriting whereas the riskier ones choose independent agents the predictions of the model agree with previous research demonstrating that the independent agent system is costlier than direct underwriting the present model suggests that this does not result from inefficiency but rather from self selection the empirical implication of this analysis is that ceteris paribus the incidence of claims made by clients of the independent agents system is higher than that of clients of direct underwriting implications for the coexistence of different distribution systems due to unbundling of services in other industries such as brokerage houses and the health care industry are discussed

monopoly regulation in the presence of consumer demand reduction abstract i study a monopoly regulation in the setting where consumers can engage in demand reducing investments i first show that when the regulator ignores the consumers investments the excess investment occurs next i analyze the case where the regulator takes consumers investments into account and compare the optimal policy under asymmetric information with the first best policy optimal policy results in higher average price higher level of consumer investment but lower prices for efficient firms compared to the first best

theory and estimation in the economics of housing demand the main purpose of this paper is to review recent theoretical and empirical developments in the economics of housing demand in particular we ask what is known concerning the permanent income elasticity of housing demand vis a vis the current or measured income elasticity what is known concerning price elasticities what is the appropriate functional form for housing demand equations what is the role of demographic variables what is known concerning dynamic aspects of housing demand what appear to be the major sources of bias in existing estimates of demand equations

on the consistency of backward looking expectations the case of the cobweb in dynamic models of economic fluctuations backward looking expectations with systematic forecasting errors are inconsistent with rational behaviour in non linear dynamic models exhibiting seemingly unpredictable chaotic fluctuations however simple habitual rule of thumb backward looking expectation rules may yield non zero but nevertheless non systematic forecasting errors in a chaotic model expectational forecasting errors may have zero autocorrelations at all lags even for rational agents patterns in these forecasting errors may be very difficult to detect especially in the presence of small noise backward looking expectations are then not necessarily inconsistent with rational behaviour we investigate whether simple expectation schemes such as naive or adaptive expectations can be consistent with rational behaviour in the simplest of all non linear dynamic economic models the non linear cobweb model

decomposing canada s growing housing affordability problem do city differences matter this article examines the role of eight factors that affect the prevalence and incidence of housing affordability problems geography demography migration immigration ethnicity income recipients income source employment and education it develops bivariate probit models that use the 1991 and 1996 canadian census public use microdata to predict the joint probability that a household spends more than half of its income on housing and that its income is below the poverty line the conclusions show that city and regional differences are negligible after the effects of the factors common to all the cities have been accounted for changing employment levels and sources of household income are the most important factors explaining the prevalence and growth of housing poverty while single parents have the highest incidence the growth of the problem is mostly in the young non family households migration immigration and ethnicity play a role that is independent of the other factors education has almost n

the fundamentals of land prices and urban growth abstract in a very simple model in which capital is durable and landowners have perfect foresight the price of urban land has four additive components the value of agricultural land rent the cost of conversion the value of accessibility and the value of expected future rent increases a growth premium in rapidly growing cities the growth premium may easily account for half of the average price of land and may create a large gap between the price of land at the boundary minus conversion cost and the value of agricultural land rent

house prices non fundamental components and interstate spillovers the australian experience abstract using australian capital city data from 1984q3 2008q2 this paper utilizes a dynamic present value model within a var framework to construct time series of house prices depicting what aggregate house prices should be given expectations of future real disposable income the fundamental price and continues by comparing capital city fundamental prices with actual prices the extent to which revealed capital city non fundamental components spillover from state to state as well as their long term impact is also investigated results provide evidence of periods of sustained deviations of house prices from values warranted by income for all state capitals with the greatest deviations arising in the nsw market and starting around 2000 in general nsw is relatively more susceptible to spillovers transmitted from other states while act and wa are most isolated from the rest of the country

eductive expectations coordination on deterministic cycles in an economy with identical fundamentals abstract we study expectations coordination on a deterministic cycle of period 2 by an eductive approach in which agents are concerned with forecasting the forecasts of others this approach is grounded in some common knowledge assumptions we use this approach to discuss the problem of equilibrium selection between the stationary state and a cycle of period 2 we prove that locally eductively stable cycles of period 2 can exist if agents have stationary beliefs

helping minor firms reduces welfare the effect on national welfare of uneven technical progress and eli mination of a firm is analyzed under the existence of a cournot oligopolistic sector an increase in the share of an inefficient firm owing to its innovations results in a shift of production from more efficient firms to the inefficient firm causing a less efficie nt allocation of production it may decrease welfare even though the innovation itself is beneficial conversely policies keeping ineffic ient firms from innovations or eliminating them may increase welfare though they make the market structure more oligopolistic copyright 1988 by royal economic society

self exciting effects of house prices on unit prices in australian capital cities this paper examines the long and short run relationship between australian house and unit prices across all capital cities over the period december 1995 to june 2015 we find that house and unit prices are cointegrated and based on the results of granger causality and generalised impulse responses that house prices significantly influence unit prices across all cities however bi directional causality responses exists only for major capital cities with the exception of brisbane we also for the first time apply self excited threshold models to explore the complex interplay between house and unit prices in australia we find that when the market for units is self excited or bullish the positive effects of house prices on unit prices are noticeably larger than otherwise there is a varying degree of herd mentality in the australian property market with sydney and darwin being the most and least excitable capital cities respectively

synchronisation and commonalities in metropolitan housing market cycles this paper examines the degree of commonalities present in the cyclical behaviour of the eight largest metropolitan housing markets in australia using two techniques originally proposed in the business cycle literature we firstly consider the degree of synchronisation present and secondly decompose the series into their permanent and cyclical components both empirical approaches reveal similar results sydney and melbourne are closely related to each other and are relatively segmented from the smaller metropolitan areas in contrast there is substantial evidence of commonalities in the cyclical behaviour of the remaining cities especially those on the eastern and southern coasts of australia

international house prices and macroeconomic fluctuations abstract the paper investigates linkages between general macroeconomic conditions and the housing market for the g 7 area among the key results of the paper we find that the us are an important source of global fluctuations not only for real activity nominal variables and stock prices but also for real housing prices secondly albeit distinct driving forces for real activity and financial factors can be pointed out sizeable global interactions are also evident in particular global supply side shocks are an important determinant of g 7 house prices fluctuations the linkage between real housing prices and macroeconomic developments is however bidirectional with investment showing in general a stronger reaction than consumption and output to housing price shocks implications for the real effects of the sub prime crisis are also explored

partial agglomeration or dispersion in spatial cournot competition 1 introductionsince the seminal work of hotelling 1929 a rich and diverse literature on spatial competition has emerged location models can be classified into two types one type is shipping or spatial price discrimination model where sellers bear transport costs the other is shopping or mill pricing model where buyers pay for transport for each type one can have either bertrand type price setting or cournot type quantity setting 1most studies on location theory use shopping mill pricing models with bertrand competition although cournot and bertrand types of non spatial models are equally popular the body of literature on spatial competition that uses cournot type models is relatively small economists have recently considered shipping models with cournot competition hamilton thisse and weskamp 1989 and anderson and neven 1991 carry out pioneering works on location models 2 they use linear city models and show that all firms agglomerate at the central point pal 1998 shows that their result is crucially dependent on the assumption of a linear city he investigates a circular city duopoly model3 and finds that an equidistant location pattern appears in equilibrium that is locational dispersion appears 4 matsushima 2001a extends pal s model to an n firm oligopoly and shows another equilibrium where half of the firms locate at one point and the other half locate at the opposite point partial agglomeration these results indicate the multiplicity of equilibria in spatial cournot models with a circular city the multiplicity of equilibria restricts the applicability of the model because the model does not give us a distinct prediction in this article we take a close look at pal 1998 and matsushima 2001a we try to solve this problem by extending their linear transport cost model to one with nonlinear transport cost 5 we consider a simplified model the numbers of firms and markets and so possible locations are four four firms choose location a b c or d see if each of the four firms chooses a different location we call this outcome pal type if two firms locate at a and the other two locate at c we call this outcome matsushima type we find that the pal type equilibrium is much more robust because i pal type equilibrium always exists as long as transport cost is increasing in distance while matsushima type equilibrium fails to exist when the transport cost function is significantly convex or concave proposition 1 ii if firms choose their locations sequentially the unique equilibrium outcome is pal type under nonlinear transport cost functions proposition 2 and iii the profit of each firm in pal type is never smaller than that in matsushima type and the former is strictly larger if the transport cost function is nonlinear proposition 3 we also compare the welfare implications of pal type and matsushima type models if the transport cost function is linear the two outcomes yield exactly the same profits consumer surplus and total social surplus however this equivalence does not hold if the transport cost function is nonlinear either convex or concave in this case pal type yields greater total social surplus and profit of each firm while matsushima type yields greater consumer surplus these results indicate that the welfare implications are sensitive to whether or not the transport cost function is linear anderson and neven 1991 show that in the linear city model a strong concavity in transport cost changes the equilibrium outcome this result is related to our results but we emphasize that our results are different from theirs first we show that both concavity and convexity of the transport cost function affect the results while in anderson and neven 1991 only strong convexity changes the result second in our propositions 2 and 3 even a slight nonlinearity changes the results

how many firms should be leaders beneficial concentration revisited we investigate how the number of stackelberg leaders and followers aects economic welfare first we discuss the model with m leaders and n m followers compete in a homogeneous good market daughety 1990 nds that under constant marginal costs the stackelberg model m2 0 n yield a higher welfare than the cournot model m 0 or

industrial blackmail dynamic tax competition and public investment a dynamic model of intergovernmental competition for a large plant is presented when local productivity is uncertain one firm determines the location of its plant in each period by conducting an auction soliciting bids from local governments equilibrium subsidies from the local governments are derived the author also consider a two stage game where local governments first choose a level of costly infrastructure then participate in the sequential auction even when costs are identical across locations investing in different levels of infrastructure is a nash equilibrium moreover when infrastructure is endogenous in this manner it is chosen efficiently