the structure of unemployment we test for a unit root in postwar unemployment rates for sixteen oecd countries when a one time structural break is incorporated the unit root hypothesis can be rejected for most of the countries and the measured persistence of unemployment falls dramatically we then test for multiple structural changes and find evidence of one or two breaks for those countries for which the unit root hypothesis could be rejected almost all of the breaks are positive reflecting the sustained rise in european unemployment the major exception is the united states where long term unemployment rose in the 1970s and fell in the 1980s

censored latent effects autoregression with an application to us unemployment a new time series model is proposed to describe observed asymmetries in postwar unemployment data we assume that recession periods when unemployment increases rapidly are caused by unobserved positive shocks the generating mechanism of these latent shocks is a censored regression model where linear combinations of lagged explanatory variables lead to positive shocks while otherwise shocks are equal to zero we apply our censored latent effects autoregression clear to monthly us unemployment where the positive shocks are found to depend on lagged oil prices industrial production the term structure of interest rates and a stock market index the model fits the data well and its out of sample forecasts appear to outperform those from alternative models

global factors and emerging market spreads this paper shows that a large fraction of the variability of emerging market bond spreads is explained by the evolution of global factors such as risk appetite as reflected in the spread of high yield corporate bonds in developed markets global liquidity measured by the international interest rates and contagion from systemic events like the russian default this link has remained relatively stable over the history of the emerging market class is robust to the inclusion of country specific factors and helps provide accurate long run predictions overall the results highlight the critical role played by exogenous factors in the evolution of the borrowing cost faced by emerging economies

imperfect competition multiple equilibria and unemployment policy this paper takes a simple imperfectly competitive macro model with increasing returns and shows how it can lead to nonexistence or multiplicity of equilibria the consequences for government policy toward unemployment are explored and shown to be very different from the traditional model it is argued that a multiple equilibrium model is an attractive possible explanation of the behavior of u k unemployment in the 1980s copyright 1990 by royal economic society

options for economic and political reform in sweden sweden assar lindbeck per molander torsten persson olof peterson agnar sandmo birgitta swedenborg and niels thygesen this paper summarizes an official report to the swedish government and general public the economic crisis in sweden is explained by both system failures and specific policy mistakes the system failures include distorted incentives and markets and inappropriate and outdated institutions the deep recession and extraordinary rise in unemployment started as a collision between inflationary wage development and attempts to pursue a hard currency policy the resulting loss of international competitiveness in the tradable sector was accompanied by increased real interest rates collapsing real estate prices and a related financial crisis following the floating of the swedish krona in november 1992 the main problem became a domestic demand collapse which has been accentuated by a spectacular rise in the household saving rate the report emphasizes that good policy advice is not enough it is also necessary to analyse and reform the institutions which continually produce undesired outcomes with respect not only to macroeconomic stability but also economic efficiency and growth the proposed institutional reforms are designed to restore a highly competitive market system and to facilitate a responsible fiscal stabilization programme this would also enhance the medium run credibility of government policies and provide scope for a more expansionary policy in the short run

finite lifetimes and the effects of budget deficits on national saving abstract even though realistic deficit policies shift sizable tax burdens to future generations the assumption of an infinite horizon is a good approximation for analyzing a deficit s short run saving effect on individuals who are neither liquidity constrained nor myopic recent u s experience casts significant doubt on these assumptions however and appears difficult to reconcile with the ricardian equivalence proposition that the timing of taxes does not affect national saving recent deficits have coincided with reduced national saving and a substantial increase in the share of gnp devoted to consumption

black hole tariffs and endogenous policy theory political economy in general equilibrium preface acknowledgments list of results 1 a preview of the results 2 endogenous policy theory a diagrammatic approach part i endogenous policy theory with specific factors the theory of industry tariffs in partial equilibrium 3 the probabilistic voting model of political efficiency and powerless politicians 4 endogenous lobbying theory and the contribution specialization theorem 5 endogenous tariff theory 6 the power function model of endogenous industry lobbying 7 three simple tests of the stolper samuelson theorem 8 the invisible foot and the waste of nations lawyers as negative externalities part ii endogenous policy theory in general equilibrium a long run theory of national tariff levels 9 the 2 x 2 x 2 x 2 model of endogenous redistribution theory 10 a prisoner s dilemma theory of endogenous protection the leontief model 11 the compensation effect and the multiple equilibrium trap 12 increasing returns to politics and factor endowments economic development and brazilian vitality versus the indian disease 13 endogenous protection in the united states 1900 88 14 a cobb douglas model 15 black hole tariffs 16 the endowment effect cross national evidence on endogenous tariffs part ii postscript 17 the senile industry argument for protection 18 optimal obfuscation and the theory of the second worst the politically efficient policy mathematical appendices references author index subject index

a long view of real rates in light of the large and sustained rise in real interest rates in the late 1970s and early 1980s this paper reviews i the theoretical discussion on the determination of nominal and real interest rates ii the factors determining real interest rates and iii problems of defining and measuring the real rate we go on to examine the historical record of real interest rates in france germany the uk and the usa since 1875 we find that high real rates since 1980 seem to be a return to a long run norm and it is the period from the second world war to 1979 that represents a more natural period in which to investigate an abrupt change of behaviour for real interest rates copyright 1999 by oxford university press

a comparison of models of long term inflationary expectations abstract this paper compares several models of long term inflationary expectations including time series models models drawn from interest rate relationships and a structural model developed from a portfolio balance framework their within sample performance over 1961 1974 and out of sample performance over periods covering 1975 1982 are compared evaluation criteria include accuracy of forecasts and ability to capture changes in the trend of long term inflation the structural model is judged best its forecasts are generally the most accurate and it performs well in periods of rising and falling inflation an attribute not present in other models

hysteresis in east asian unemployment high performing asian economies are quite distinctive with efficient flexible and responsive labour markets comparing the persistence of unemployment in east asian economies to that in western countries is difficult due to the data s short time spans and possible structural breaks this article employs advanced unit root tests to deal with these problems and fails to reject hysteresis in the unemployment rates of the high performing asian countries even after taking into account structural change an alternative explanation of different productivity growth for the hysteresis phenomenon of the asian countries is proposed herein

incentives to cultivate favored minorities under alternative electoral systems a simple model is used to compare under different electoral systems the incentives for candidates to create inequalities among otherwise homogeneous voters by making campaign promises that favor small groups rather than appealing equally to all voters in this game model each candidate generates offers for voters independently out of a distribution that is chosen by the candidate subject only to the constraints that offers must be nonnegative and have mean 1 symmetric equilibria with sincere voting are analyzed for two candidate elections and for multicandidate elections under rank scoring rules approval voting and single transferable vote voting rules that can guarantee representation for minorities in multiseat elections generate in this model the most severely unequal campaign promises

savings trends and measurement issues saving has attracted increasing attention in recent years research has focused on questions about its adequacy determinants and measurement this paper considers the latter issue the main trends in world wide and oecd area saving over the last two to three decades are reviewed subsequently the appropriateness of the saving concept used in traditional national accounts is discussed to examine the size of some of the potential problems a number of adjustments to traditionally measured saving are made the concluding section raises some questions about appropriate measurement of saving saving behaviour and policy responses to perceived lack of saving

the ricardian approach to budget deficits persistent budget deficits have increased economists interest in theories and evidence about fiscal policy this paper develops the ricardian approach and contrasts it with standard models the discussion considers from major theoretical objections to ricardian equivalence finite lifetimes imperfect capital markets uncertainty about future taxes and incomes and the distorting effects of taxation the paper then considers empirical evidence on interest rates consumption and saving and current account deficits the conclusion is that the ricardian approach is a useful first order approximation and that this approach will probably become the benchmark model for assessing fiscal policy this abstract was borrowed from another version of this item

emerging market spreads then versus now we analyze yield spreads on sovereign bonds issued by emerging markets using modern data from the 1990s and newly collected historical data on bonds traded in london during 1870 1913 a previous era of global capital market integration we show that spreads today comove across emerging markets to a significantly higher degree than they did in the historical sample moreover sharp changes in spreads in the 1990s tend to be mostly related to global events whereas they were primarily related to country specific events in 1870 1913 although we find that fundamentals comove somewhat more strongly today than they did in the past we conjecture that today s investors pay less attention to country specific events than their predecessors did

balanced budget redistribution as the outcome of political competition this paper models balanced budget redistribution between socio economic groups as the outcome of electoral competition between two political parties equilibrium is unique in the present model and a sufficient condition for existence is given requiring that there be enough stochastic heterogeneity with respect to party preferences in the electorate the validity of hotelling s principle of minimum differentiation and of director s law are examined under alternative hypotheses concerning administrative costs of redistributions and voter s possibilities both of abstaining from voting and of becoming campaign activists for one of the parties the policy strategy of expected plurality maximization is contrasted with the strategy of maximizing the probability of gaining a plurality incomes are fixed and known so lump sum taxation is feasible however constraints on tax transfer differentiation between individuals are permitted in the analysis

redistributive politics and economic efficiency the political process often compensates the losers from technical change or international competition in an economically inefficient way namely by subsidizing or protecting declining industries instead of encouraging the movement of resources to other more productive uses we find that a dynamic inconsistency in the game of redistributive politics contributes to this outcome to achieve economically efficient outcomes it is necessary that those making economically inefficient choices not be given offsetting transfers but the political process distributes income on the basis of political characteristics which are in general different from the economic characteristics that are rewarded by the market we identify circumstances in which the inefficient choosers have desirable political characteristics and are therefore immune from threats of having to face the economic consequences of their choices

corruption and allocation efficiency abstract in this paper we investigate the possibility of allocation inefficiencies associated with corrupt practices specifically we consider the case in which two firms compete via bribery of a corrupt government official for a to be awarded project the economy may suffer allocation inefficiencies whenever there is some degree of discrimination given additional assumptions it is shown that the possibility of inefficient allocations increases as the degree of discrimination increases although empirical verification of discrimination is difficult due to the observational equivalence of an alternative imperfect knowledge model two possible explanations for the determination of discrimination coefficients indicate that it is a general phenomenon in competitive bribery games

comparing smooth transition and markov switching autoregressive models of us unemployment logistic smooth transition and markov switching autoregressive models of a logistic transform of the monthly us unemployment rate are estimated by markov chain monte carlo methods the markov switching model is identified by constraining the first autoregression coefficient to differ across regimes the transition variable in the lstar model is the lagged seasonal difference of the unemployment rate out of sample forecasts are obtained from bayesian predictive densities although both models provide very similar descriptions bayes factors and predictive efficiency tests both bayesian and classical favor the smooth transition model copyright 2008 john wiley sons ltd

the cyclical properties of consumption growth and the real term structure abstract expected real yields on nominally risk free bonds and expected consumption growth at horizons from one quarter to two years are identified using time series models and their basic properties are examined the principal results are 1 real yields and consumption growth are weakly negatively correlated over the full sample period of 1953 1991 2 excluding the 1979 1985 sub period real yields and consumption growth are strongly positively correlated 3 the cyclical properties of real yields and consumption growth are qualitatively similar in the pre 1979 data and they are consistent with a simple real business cycle model

gibson s paradox and the gold standard this paper contributes a new element to the explanation of the gibson paradox the puzzling correlation between interest rates and the price level seen during the gold standard period a shock that raises the underlying real rate of return in the economy reduces the equilibrium relative price of gold and with the nominal price of gold pegged by the authorities must raise the price level the mechanism involves the allocation of gold between monetary and nonmonetary uses our explanation helps to resolve some important anomalies in previous work and is supported by empirical evidence along a number of dimensions

macroeconomic shocks in a dynamized model of the natural rate of unemployment at the microeconomic level this paper revises and broadens the theory of the equilibrium rate of unemployment the natural rate in a monetary model the authors begin by recreating steven salop s turnover model of the natural rate in its naturally intertemporal version useful findings on impact effects and the adjustment process at the individual firm necessarily excluded by the static version are shown to derive from the dynamized model at the macroeconomic level the authors then provide a general equilibrium analysis of some shocks showing how they drive the equilibrium unemployment rate and in varying ways also disturb the real rate of interest copyright 1992 by american economic association

the effects of budget deficit on national saving in the oecd abstract in this paper we estimate a structural var using a panel of oecd countries which includes national saving and budget deficit both as the ratio to gdp to test the ricardian equivalence hypothesis in this framework we separate saving and deficit movements into two types of shocks associated with structural parameters of these economies our results suggest that ricardian equivalence did not work in our sample of oecd countries since private saving compensated only a small fraction budget deficit this supports the interpretation that the large budget deficits have been a very important factor behind the significant increase in real interest rates in the eighties and early nineties

economic uncertainty and corruption evidence from a large cross country data set a vast amount of research has considered numerous causes and correlates of corruption also there have been many studies of the consequences of various forms of uncertainty however exploration of the nexus between economic uncertainty and corruption appears scarce after providing an intuitive and heuristic linkage between general economic uncertainty and corruption this article uses a large cross country data set to augment a fairly standard model with simple proxies for uncertainty and to investigate how economic uncertainty might affect the prevalence of corruption in addition a quantile regression framework is used to judge how the strength of various covariates may differ with the level of corruption seven main points emerge from the estimates first economic uncertainty is associated positively with corruption and the relation seems to be robust across measures of uncertainty and corruption second quantile regression estimates indicate considerable parametric heterogeneity across the dist

allocation efficiency in a competitive bribery game abstract we consider the selection properties of a competitive bribery model in the presence of two types of asymmetry unevenness between the competitors and unfairness in the contest rules only under very special conditions does the benchmark model yield allocation efficiency in other cases the effect on allocation efficiency of making the contest more unfair is ambiguous and parameter specific we present conditions under which each result obtains our results indicate that it is socially optimal to run an unfair contest in order to redress the allocation inefficiency introduced when contestants are asymmetric we show however that a selfish income maximizing bribee will discriminate in the opposite direction to that which society would prefer

general blotto games of allocative strategic mismatch the colonel blotto game captures strategic situations in which players attempt to mismatch an opponent s action we extend colonel blotto to a class of general blotto games that allow for more general payoffs and externalities between fronts these extensions make blotto applicable to a variety of real world problems we find that like colonel blotto most general blotto games do not have pure strategy equilibria using a replicator dynamics learning model we show that general blotto may have more predictable dynamics than the original blotto game thus adding realistic structure to colonel blotto may paradoxically make it less complex

comovement or safe haven the effect of corruption on the market risk of sovereign bonds of emerging economies during financial crises in this study i explore the role of corruption in the cross market time varying linkage between sovereign bonds of emerging markets and the us stock market it shows that corruption plays a prominent role in the behaviour of capm beta under different market conditions the sensitivity of sovereign bonds issued by countries perceived as more corrupt to systematic shocks increases during financial crises the prices of bonds issued by less corrupt countries are determined more idiosyncratically under extreme market conditions and realize more hedging benefits against s p 500 risk to explain these findings i integrate results from behavioural finance i propose a comovement model built on barberis et al 2005 where investors load more worldwide news on sovereign bonds issued by more corrupt countries when their sentiment deteriorates

unemployment persistence does the size of the shock matter one of the stylized facts of unemployment is that shifts in its mean rate between decades and half decades account for most of its variance in this paper we use a statistical analysis based on markov switching regression models to identify the dates of infrequent changes in the mean of the unemployment rate series of fifteen countries we find that in most countries unemployment persistence is much reduced once the infrequently changing mean rate induced by large shocks to unemployment has been removed we conclude that the observed persistence in unemployment appears to be consistent with multiple equilibria models and models with an endogeneous natural rate 1998 john wiley sons ltd

british monetary and fiscal policy in the 1930s current economic turbulence has revived interest in interwar macroeconomic instability and policy this paper provides a guide to the current state of knowledge on british macroeconomic policy between 1929 and the eve of the second world war for today s economists and policy makers mindful that some will seek lessons from this earlier age it makes clear the very particular economic and policy context of the time including the marked difference between british and american economic performance and policies and the challenge posed by the massive rise in debt brought about by the first world war knowledge transfer is possible here for policy learning but what transpires is that lessons are typically stronger as negatives than as positives namely what should not be done in general as against what might be done this largely situation specific the focus is the role and effectiveness of the monetary and fiscal policies pursued together with an assessment of the principal policy not adopted namely the keynesian solution of significant loan financed public works to remedy mass unemployment the analysis is comparative with respect to us macroeconomic economic performance and policy it explores the different macroeconomic shocks of the contraction phase the term great depression is not really appropriate to the british experience in the two countries comparative policy regimes and then in turn analyses the policy mix and policy effectiveness of monetary and fiscal policy including for britain the counterfactual keynesian solution a business cycle periodization is adopted with the key role for the abandonment of the gold standard in terms of regaining freedom of choice in macroeconomic policy itself experiencing significant developments after 1931 the traditional role of the cheap money induced housing boom in britain s post 1932 economic recovery is reaffirmed the impact of the fiscal policies actually pursued are then discussed as are assessments of the likely effectiveness of the keynesian solution had the 1929 liberal party s we can conquer unemployment spending package been implemented

shrouded costs of government the political economy of state and local public pensions abstract why do public sector workers receive so much of their compensation in the form of pensions and other benefits this paper presents a political economy model in which politicians compete for taxpayers and government employees votes by promising compensation packages but some voters cannot evaluate every aspect of promised compensation if pension packages are shrouded so that public sector workers better understand their value than ordinary taxpayers then compensation will be highly back loaded in equilibrium the welfare of public sector workers could be improved holding total public sector costs constant if they received higher wages and lower pensions centralizing pension determination has two offsetting effects on generosity more state level media attention helps taxpayers better understand pension costs and that reduces pension generosity but a larger share of public sector workers will vote within the jurisdiction which increases pension generosity a short discussion of pensions in two decentralized states california and pennsylvania and two centralized states massachusetts and ohio suggests that centralization appears to have modestly reduced pensions but as the model suggests this is unlikely to be universal

world interest rates and investment in a world of integrated capital markets the price of credit which is measured by shortterm expected real interest rates is determined to equate the world aggregate of investment demand to the world aggregate of desired national saving this approach is implemented empirically by approximately the world by aggregates for ten major developed countries for the period since 1959 the common component of expected real interest rates for these countries relates especially to developments on world stock and oil markets and secondarily to world monetary and fiscal policies

what drives long term capital flows a theoretical and empirical investigation abstract what drives capital inflows in the long run this paper illustrates how capital movements conform surprisingly well to the predictions of a neoclassical model with credit constraints the most intriguing prediction of this class of models is that contrary to a pure neoclassical model domestic saving should act as a complement rather than a substitute to capital inflows nevertheless this class of models keeps the neoclassical prediction that capital should flow to countries where it is most scarce using foreign debt data from 1970 to 1998 i find qualitative and quantitative evidence that supports these predictions

an investigation of ricardian equivalence in a common trends model abstract to empirically discriminate between ricardian and non ricardian behaviour we have to use a method that distinguishes between expected and unexpected as well as permanent and transitory changes in taxes and government consumption one method that provides these distinctions between different types of changes is the common trends framework used in this paper which is a var model with cointegrating constraints in the empirical study of us data there is some support for the ricardian hypothesis but there are also some deviations from its predictions however the differences do not lend support to a keynesian view of budget deficits but rather to the view of expansionary fiscal contractions this can be motivated theoretically by uncertainty about future taxes in combination with prudent households

ricardian equivalence and the public and private saving nexus in india abstractthis study tests the ricardian equivalence theorem ret and examines the responsiveness of private saving to public saving in india most estimators do not provide support for the empirical validity of ret and long run cointegration between public and private saving the increases in household saving hhs seem to have been engendered by the provision of saving incentives institution of saving schemes self driven motivation to save and the precautionary accumulations induced by uncovered uncertainties in incomes rather than by ricardian behaviour of households the self imposed aversion to debt and debt bequest borrowing and liquidity constraints and the intertemporal smoothing of consumption have been the added catalysts that contributed to the increases in hhs the households with binding borrowing constraints inadequate or no insurance and uncovered uncertainties in incomes seem to have been saving more to pay for higher inflation tax the fiscal consolidation and generation of public s

a model of imperfect competition with keynesian features the recent literature on the reappraisal of keynes has viewed keynesian equilibria as arising when prices are fixed and effective demands and supplies are equilibrated through the adjustment of quantities one problem with this approach is that it lacks a theory of price determination in particular of why prices are fixed in the present paper we show that a number of keynesian features arise in a model in which prices are fully flexible but where agents have some monopoly power one advantage of this approach is that it provides a theory of the determination of both prices and quantities

a theory of competition among pressure groups for political influence this paper presents a theory of competition among pressure groups for political influence political equilibrium depends on the efficiency of each group in producing pressure the effect of additional pressure on their influence the number of persons in different groups and the deadweight cost of taxes and subsidies an increase in deadweight costs discourages pressure by subsidized groups and encourages pressure by taxpayers this analysis unifies the view that governments correct market failures with the view that they favor the politically powerful both are produced by the competition for political favors

investment in the absence of property rights the role of incumbency advantages in many situations the individuals who can generate some output must enter a contest for appropriating this output this paper analyses the investment incentives of such agents and the role of incumbency advantages in the contest depending on the advantages an increase in the productivity of the investment can decrease or increase the amount of investment the results are applied to autocrats investment behavior and job specific investment in organizations

saving investment and the current account in this review of recent work on the relationship between saving investment and the current account it is shown that focusing on national saving and investment behavior and modeling these in a modern intertemporal optimization framework will modify some conventional results regarding the relationship between the current account and the terms of trade the exchange rate and fiscal policy it is also shown that such a framework can explain the close empirical correlation between national saving and investment rates without relying on limited international capital mobility it is conjectured that a better empirical understanding of current account developments could be gained if modem theories of investment and saving behavior were used more systematically in applied studies

allocative efficiency of markets with zero intelligence traders market as a partial substitute for individual rationality we report market experiments in which human traders are replaced by zero intelligence programs that submit random bids and offers imposing a budget constraint i e not permitting traders to sell below their costs or buy above their values is sufficient to raise the allocative efficiency of these auctions close to 100 percent allocative efficiency of a double auction derives largely from its structure independent of traders motivation intelligence or learning adam smith s invisible hand may be more powerful than some may have thought it can generate aggregate rationality not only from individual rationality but also from individual irrationality

efficiency welfare and political competition we study political competition in an environment in which voters have private information about their preferences our framework covers models of income taxation public goods provision or publicly provided private goods politicians are vote share maximizers they can propose any policy that is resource feasible and incentive compatible they can also offer special favors to subsets of the electorate we prove two main results first the unique symmetric equilibrium is such that policies are surplus maximizing and hence first best pareto efficient second there is a surplus maximizing policy that wins a majority against any welfare maximizing policy thus in our model policies that trade off equity and efficiency considerations are politically infeasible jel codes c72 d72 d82 h21 h41 h42

do expected shifts in inflation affect estimates of the long run fisher relation recent empirical studies suggest that nominal interest rates and expected inflation do not move together one for one in the long run a finding at odds with many theoretical models this article shows that these results can be deceptive when the process followed by inflation shifts infrequently we characterize the shifts in inflation by a markov switching model based upon this model s forecasts we reexamine the long run relationship between nominal interest rates and inflation interestingly we are unable to reject the hypothesis that in the long run nominal interest rates reflect expected inflation one for one

heterogeneous information and the theory of the business cycle the inability to observe the money supply and price level has been an essential ingredient of informational based equilibrium models of cycles here we assume these data are available but show that heterogeneous information about the productivity of capital can lead to a monetary theory of fluctuations in equilibrium each agent s investment depends on the difference between his own productivity and the perceived real rate in the presence of money demand shocks the nominal rate is noisy signal of the real rate this leads to greater fluctuations in output than if all agents had the same information

asset market linkages in crisis periods we characterize asset return linkages during periods of stress by an extremal dependence measure contrary to correlation analysis this nonparametric measure is not predisposed toward the normal distribution and can allow for nonlinear relationships our estimates for the g 5 countries suggest that simultaneous crashes between stock markets are much more likely than between bond markets however for the assessment of financial system stability the widely disregarded cross asset perspective is particularly important for example our data show that stock bond contagion is approximately as frequent as flight to quality from stocks into bonds extreme cross border linkages are surprisingly similar to national linkages illustrating a potential downside to international financial integration

inefficient redistribution and inefficient redistributive politics this paper examines the effect of inefficient redistribution in myerson s american political science review 87 856 869 1993 model of redistributive politics regardless of the absolute levels of the efficiency of political parties transfers to different voter segments parties have incentive to stochastically shift resources away from voter segments with large relative efficiency gaps between the two parties transfers towards voter segments with smaller relative efficiency gaps because of this dependence on relative and not absolute levels of efficiency the parties optimal strategies may lead to large discrepancies between the sum of the budgetary transfers and the sum of the effective transfers

portfolio choices and asset prices the comparative statics of ambiguity aversion we investigate the comparative statics of more ambiguity aversion as defined by klibanoff marinacci and mukerji 2005 in the context of the static two asset portfolio problem it is not true in general that more ambiguity aversion reduces the demand for the uncertain asset we exhibit some sufficient conditions to guarantee that ceteris paribus an increase in ambiguity aversion reduces the demand for the ambiguous asset and raises the equity premium for example this is the case when the set of plausible distributions of returns can be ranked according to the monotone likelihood ratio order we also show how ambiguity aversion distorts the price kernel in the alternative portfolio problem with complete markets for contingent claims

business cycles with costly search and recruiting a business cycle model is developed in which output is traded on lucas phelps islands and labor services on each island are exchanged through costly search and recruiting with transactions externalities the model exhibits persistent involuntary unemployment and inefficient equilibria even though there are no nominal rigidities and no unexploited privately attainable gains from trade it also exhibits employment fluctuations without any real wage fluctuations it yields a lucas aggregate supply curve to a linear approximation it also implies that the natural rate of unemployment depends positively upon the variability and persistence of relative price shocks

financial innovation and monetary control the economic conjuncture of the 1970s and 1980s was extremely disturbed with high and volatile inflation interest and exchange rates this led the monetary authorities of most western coun tries to adopt monetary targets as a financial discipline to constrain inflationary pressures but this same conjuncture also encouraged the process of financial innovation which subsequently eroded the stability of the links between certain monetary aggregates and nominal incomes which had provided the empirical basis for such targetry thus in his recent book financial in novations and the money supply podolski 1986 argues that