on the indeterminacy of capital accumulation paths abstract in neoclassical optimal growth models the stability of the accumulation paths depends on the discount parameter we prove that for discount factors small enough the policy function which describes an optimal path can be of any type the result is achieved using the notion of concavity we adopt a constructive approach given any twice differentiable map we show how to construct an optimal growth problem which produces that map as the optimal policy function a consequence is that chaos can appear in these models we also provide bounds on the values of the discount parameter for which indeterminacy is possible

a characterization of erratic dynamics in the overlapping generations model abstract in this paper we characterize and give examples o wide classes of utility functions which generate erratic dynamics in the standard deterministic overlapping generations model erratic dynamics refers to feasible trajectories which are bounded but which do not converge to stationary points or periodic orbits we show that such trajectories are pareto efficient we introduce credit into the model and show how a constant credit expansion rate can result in erratic trajectories in prices and the real value of credit finally we briefly discuss certain technical aspects of the mathematics used and the statistical nature of the dynamics that can arise from deterministic dynamical systems

switching regression models with imperfect sample separation information with an application on cartel stability an exogenous switching regression model with imperfect reginme classificationi information is specified and applied to a study of cartel stability an efficient estimation method is proposed which takes this imperfect information into account the consequences of misclassification are analyzed the direction of the least squares bias is derived an optimal regime classification rule is obtained and compared theoretically and empirically with other classification rules we then examine the joint executive committee a railroad cartel in the 1880 s the econometric evidence indicates that reversions to noncooperative behavior did occur for the firms in our sample and these reversions involve a significant decrease in market price this article is concerned with the possibility of estimating a switching regression model and its application to a study on cartel stability the switching regression model is the exogenous switching model proposed by quandt 24 which generalized a problem of mixture distributions day 4 the sample in this model is generated from distinct regression equations or regimes for each time period if the investigator has a priori information on how the sample is partitioned into the underlying regimes it is a switching regression model with known sample separation otherwise it is a model with unknown sample separation estimation of these latter models has been considered by quandt 24 goldfeld and quandt 8 and kiefer 14 16 among others a switching regression model is appropriate for the study of cartel behavior when there are price wars as firms will revert from cooperative to noncooperative behavior and so the industry supply function shifts occasionally this model will allow us to exploit the fact that there will be periodic stochastic switches or reversions between cooperative and noncooperative conduct in order to identify collusive episodes

testing the response of consumption to income changes with noisy panel data this paper tests the rational expectations lifecycle model of consumption against i a keynesian model and ii the rational expectations lifecycle model with imperfect capital markets the tests are based upon the relative responsiveness of consumption to income changes that can be predicted from past information and income changes that cannot he predicted the tests allow for measurement error in income the results reject the keynesian model and generally support the lifecycle model but the results are not sufficiently precise to rule out the possibility that some households are liquidity constrained measurement error has a strong influence on the relationship between consumption and income

trade finance specialization and synchronization i investigate the determinants of business cycle synchronization across regions the linkages between trade in goods financial openness specialization and business cycle synchronization are evaluated in the context of a system of simultaneous equations the main results are as follows i specialization patterns have a sizable effect on business cycles most of this effect is independent of trade or financial policy but directly reflects differences in gdp per capita ii a variety of measures of financial integration suggest that economic regions with strong financial links are significantly more synchronized even though they also tend to be more specialized iii the estimated role of trade is closer to that implied by existing models once intra industry trade is held constant the results obtain in a variety of data sets measurement strategies and specifications they relate to a recent strand of international business cycle models with incomplete markets and transport costs and on the empir

borders and business cycles abstract we document that business cycles of u s census regions are substantially more synchronized than those of european countries data from regions within european countries confirm a european border effect within country correlations are substantially larger than cross country correlations these results continue to hold after controlling for exogenous factors such as distance and size we consider the role of four factors that have received attention in the debate about emu sectoral specialization the level of trade monetary policy and fiscal policy we find that the lower level of trade between european countries explains most of the observed border effect

the hodrick prescott filter the slutzky effect and the distortionary effect of filters abstract i construct a metric based on optimal filtering for measuring the distortionary effect of business cycle filters the distortionary effect of a filter depends both on the power transfer function of the filter and on the spectrum of the filtered time series the metric is used for two purposes first to determine the optimal value of the smoothing parameter in the hodrick prescott filter hp filter secondly to measure the size of distortions of ten different filters the slutzky effect is a special case of a more general pattern of distortions and it is shown that the alleged slutzky effect of the hp filter is due to an insufficient distinction between the effect of filtering with an ideal high pass filter and the distortionary effect of the hp filter

macroeconomic interdependence under incomplete markets this paper uses a two country flexible price model with overlapping generations of infinitely lived households to study the role of net foreign asset dynamics in the propagation of productivity shocks absence of ricardian equivalence ensures existence of a unique steady state level of net foreign assets to which the economy returns following temporary shocks model dynamics are significantly different from those of a setup in which terms of trade movements perform all the international adjustment and net foreign assets do not move the difference relative to a complete markets economy in which net foreign asset movements play no role in shock transmission is smaller it is amplified if the substitutability across goods rises and if shocks are permanent

a new approach to decomposition of economic time series into permanent and transitory components with particular attention to measurement of the business cycle abstract this paper introduces a general procedure for decomposition of non stationary time series into a permanent and transitory component allowing both components to be stochastic the permanent component is shown to be a random walk with drift and the transitory or cyclical component is a stationary process with mean zero the decomposition methodology which depends only on past data and therefore is computable in real time is applied to the problem of measuring and dating business cycles in the portwar u s economy we find that measured expansions and contractions are of roughly equivalent duration and that our dating of cyclical episodes tends to lead the traditional nber dating and to a lesser extent the growth cycle chronology of zarnowitz and boschan 1977

precautionary saving under liquidity constraints evidence from rural pakistan this paper investigates precautionary saving under liquidity constraints in pakistan using household panel data in particular while we estimates kimball s 1990 prudence parameter we deviate from dynan s 1993 framework by explicitly considering liquidity constraints as in zeldes 1989 by doing so we attempt to differentiate the standard precautionary saving caused by uncertainty from the one due to liquidity constraints furthermore endogenous liquidity constraints are considered to resolve issues of selection biases in this study we document substantial evidence of the presence of precautionary saving in pakistan more specifically the estimated prudence is significantly higher for liquidity constrained households as compared with unconstrained ones the results support the emerging view that facilitating saving may often be more important than finding better ways of lending to the poor

a life cycle consistent empirical model of family labour supply using cross section data this paper estimates a utility maximising model of the joint determination of male and female labour supplies using a sample of married couples from the u k family expenditure survey the emphasis is on the estimation of within period preferences that are consistent with intertemporal two stage budgeting under uncertainty however the approach we adopt provides an alternative method of estimating certain aspects of life cycle behaviour to the fixed effects constant approach of heckman and macurdy 1980 macurdy 1981 and browning deaton and irish 1985 moreover it relaxes some of the underlying restrictions that are implicit in these constant models under uncertainty

excess sensitivity of consumption to current income liquidity constraints or myopia this paper asks whether the empirical rejection of the rational expectations permanent income hypothesis occurs because agents are myopic in the sense that the marginal propensity to consume out of transitory income is non zero or because some agents face liquidity constraints the finding that the estimate of the mpc out of transitory income is dramatically affected in both magnitude and statistical significance by the inclusion of a proxy for liquidity constraints suggests that liquidity constraints are an important part of the explanation of the observed excess sensitivity of consumption to current income la sensibilite excessive de la consommation au revenu courant contraintes sur la liquidite ou myopie ce memoire examine la question a savoir pourquoi l hypothese du revenu permanent avec anticipations rationnelles n est pas v6rifiee empiriquement est ce parce que les agents economiques sont myopes i e que leur propension marginale a consommer a partir de leur revenu transitoire n est pas nulle ou bien est ce que certains agents economiques font face a des contraintes sur leur liquidite le fait que l estimation de la propension marginale a consommer le revenue transitoire est affectee par l inclusion d une variable qui tente de capturer l importance des contraintes sur la liquidit6 tant dans l 6valuation de sa taille que dans sa signification statistique suggere que ces contraintes jouent un role important dans l explication de cette sensibilite excessive qu on observe de la consommation aux changements dans le niveau de revenu courant almost all the recent empirical tests of the rational expectations permanent income hypothesis re pih have rejected the hypothesis using a rich variety of data sets and estimation methods the empirical work indicates that the failure of the re pih is significant both statistically and quantitatively the null hypothesis in this empirical literature typically consists of the joint hypothesis that 1 agents expectations are formed rationally 2 desired consumption is determined by permanent income and 3 capital markets are perfect in the sense that agents can lend or borrow against 1 studies rejecting the re pih include blinder 1981 flavin 1981 hall and mishkin 1982 hayashi 1982 and sargent 1978 in his original paper hall 1978 did not reject the re pih decisively however flavin 1981 showed that with a minor alteration in the specification of the alternative hypothesis the re pih could be rejected using hall s test and data set bernanke 1981 studying panel data on automobile expenditures did not find evidence against the hypothesis for an extensive survey of the empirical literature on the rational expectations permanent income hypothesis see king 1983 canadian journal of economics revue canadienne d economique xviii no 1 february fevrier 1985 printed in canada imprime au canada 0008 4085 85 117 36 1 50 canadian economics association this content downloaded from 157 55 39 17 on wed 31 aug 2016 05 08 58 utc all use subject to http about jstor org terms

trade production sharing and the international transmission of business cycles countries that are more engaged in production sharing exhibit higher bilateral manufacturing output correlations we use data on trade flows between us multinationals and their affiliates as well as trade between the united states and mexican maquiladoras to measure production sharing trade and its link with the business cycle we then develop a quantitative model of international business cycles that generates a positive link between the extent of vertically integrated production sharing trade and internationally synchronized business cycles a key assumption in the model is a relatively low elasticity of substitution between home and foreign inputs in the production of the vertically integrated good

the role of capital depreciation in multi sectoral models abstract this study investigates the role of capital depreciation in economic fluctuations that may appear in multi sectoral models of optimal growth in the standard literature on non linear optimal dynamics it has been assumed that capital depreciates completely within a period this study in contrast deals with the case in which capital depreciates slowly more precisely only by a certain percentage we adopt the standard two sector model with cobb douglas production functions and characterize the dynamics around the stationary state we derive explicit conditions on parameter values under which cyclical optimal paths appear these conditions reveal the complexity that slow depreciation adds to multi sectoral optimal dynamics the economic interpretation of slow depreciation in multi sectoral models is also discussed

irregular growth cycles this paper uses the familiar neoclassical theory of capital accumulation to show how complex behavior can emerge from quite simple economic structures indeed when sufficient nonlinearities and a production lag are present the interaction alone of the propensity to save and the productivity of capital can lead to growth cycles that exhibit a wandering sawtooth pattern not unlike those observed in reality these fluctuations need not converge to a cycle of any regular periodicity so they are not quasi periodic because such chaotic trajectories are unstable errors of estimation in parameters or initial conditions however tiny will accumulate rapidly into substantial errors of forecast moreover periods of erratic cycling can be interspersed with periods of more or less stable growth evidently the future behavior of a model solution cannot be anticipated from its patterns in the past a situation that seems to mimic experience apparent structural change and unpredictability is explained in the present theory by a deterministic single equation model random shocks play no role so the reader can visualize just what it is we are are talking about a noteworthy simulation is presented in figure 1 for gnp in a growth model that is described below in section iii a period of relatively rapid growth is followed by a period of cycles then remarkably for a considerable time about twenty periods apparently steady state growth occurs wandering cycles however emerge another brief period close to the steady state appears again toward the end of the series i establish conditions of savings and productivity that lead to results of this kind this analysis makes use of the mathematical theory of chaos which in the form exploited here originated in the work of edward lorenz a formal definition of chaos and sufficient conditions for chaotic trajectories were provided in a seminal paper by t y li and james yorke a survey of these related contributions is found in yorke and evelyn yorke this theory was introduced into economics by jess benhabib and myself 1981 where we showed that sequences of rational choices can be erratic when preferences depend on experience in a certain way by michael stutzer who provides a detailed analysis of trygve haavelmo s growth model by benhabib and myself 1980 in an application of the overlapping generations model and in my forthcoming study of the classical growth model

labour force participation timing and persistence this paper examines the relative importance of timing and persistence elements in explaining cyclical fluctuations in labour supply data from the natural experiment provided by world war ii and cross sectional data on american local labour markets as well as aggregate time series data are used in the empirical work we find little evidence that timing effects play an important role in labour market dynamics the evidence suggests that views emphasizing persistence are more accurate and that previous employment tends to raise the probability of subsequent employment much of the development of applied economic theory within the past 25 years has emphasized the importance of viewing economic decisions in a life cycle context consumption decisions are today frequently viewed as being determined by wealth or permanent income the human capital revolution has brought life cycle considerations to the forefront of modern labour economics while the life cycle dynamics of labour force participation decisions have important implications for macroeconomic theory and policy they have received relatively little empirical attention with the notable exceptions of lucas and rapping 1969 and hall 1980 none of the large body of work on cyclical fluctuations in employment has explicitly relied on a dynamic model of labour supply this paper uses several types of data to examine two elements of participation dynamics the first is the aspect of timing which is implicit in the work of lucas and rapping and in mincer s 1966 early discussion of hidden unemployment the timing argument which is presented most explicitly in ghez and becker 1975 holds that leisure is easily substitutable across periods hence relatively small transitory movements in the perceived real wage or real rate of return can have large effects on the path of labour supply as individuals time their participation to coincide with periods of high transitory wages on the other hand permanent changes because they do not affect the timing decision are expected to have a much smaller effect on participation it is this view of labour supply which underlies new classical macroeconomic models the dependence is made explicit in lucas 1975 who claims that what we do know indicates that leisure in one period is an excellent substitute for leisure in other nearby periods the ability of classical macroeconomic models to explain fluctuations in employment depends on the presence of strong intertemporal substitution effects unless

state dependence serial correlation and heterogeneity in intertemporal labor force participation of married women a dynamic search framework is developed to analyze the intertemporal labor force participation behavior of married women using longitudinal data to allow for a rich dynamic structure the sensitivity to alternative distributional assumptions is evaluated using linear probability and probit models the dynamic probit models are estimated using maximum simulated likelihood msl estimation to overcome the computational difficulties inherent in maximum likelihood estimation of models with nontrivial error structures the results find that participation decisions are characterized by significant state dependence unobserved heterogeneity and negative serial correlation in the error component the hypothesis that fertility decisions are exogenous to women s participation decisions is rejected when dynamics are ignored however there is no evidence against this hypothesis in dynamic model specifications women s participation response is stronger to permanent than current nonlabor income reflecting unobserved taste factors

saving and liquidity constraints this paper is concerned with the theory of saving when consumers are not permitted to borrow and with the ability of such a theory to account for some of the stylized facts of saving behavior the models presented in the paper seem to account for important aspects of reality that are not explained by traditional life cycle models copyright 1991 by the econometric society

comovement in gdp trends and cycles among trading partners abstract it has long been recognized that business cycle comovement is greater between countries that trade more intensively with one another however nations face shocks to both the cyclical and trend components of their gdp series contrary to the result for cyclical fluctuations we find comovement of shocks to the trend component of real gdp is weaker among countries that trade more intensively with one another we simulate changes in ten year output growth correlations corresponding to the estimated effects of trade and show that the impact of trade on trend comovement is quantitatively more important than its effect on cyclical comovement

detrending stylized facts and the business cycle the stylized facts of macroeconomic time series can be presented by fitting structural time series models within this framework we analyse the consequences of the widely used detrending technique popularised by hodrick and prescott 1980 it is shown that mechanical detrending based on the hodrick prescott filter can lead investigators to report spurious cyclical behaviour and this point is illustrated with empirical examples structural time series models also allow investigators to deal explicitly with seasonal and irregular movements that may distort estimated cyclical components finally the structural framework provides a basis for exposing the limitations of arima methodology and models based on a deterministic trend with a single break

trends and cycles in macroeconomic time series two structural time series models for annual observations are constructed in terms of trend cycle and irregular components the models are then estimated via the kalman filter using data on five u s macroeconomic time series the results provide some interesting insights into the dynamic structure of the series particularly with respect to cyclical behavior at the same time they illustrate the development of a model selection strategy for structural time series models

estimating potential output as a latent variable this article proposes a new method for estimating potential output in which potential real gross domestic product gdp is modeled as an unobserved stochastic trend and deviations of gdp from potential affect inflation through an aggregate supply relationship the output and inflation equations together form a bivariate unobserved components model which is estimated via maximum likelihood through the use of the kalman filter algorithm the procedure yields a measure of potential output and its standard error and an estimate of the quantitative response of inflation to real growth and the output gap

how does globalization affect the synchronization of business cycles this paper examines the impact of rising trade and financial integration on international business cycle comovement among a large group of industrial and developing countries the results provide at best limited support for the conventional wisdom that globalization has increased the degree of synchronization of business cycles the evidence that trade and financial integration enhance global spillovers of macroeconomic fluctuations is mostly limited to industrial countries one striking result is that on average cross country consumption correlations have not increased in the 1990s precisely when financial integration would have been expected to result in better risk sharing opportunities especially for developing countries this abstract was borrowed from another version of this item

participation inertia in r d tax incentive and subsidy programs we examine how persistent firms participation is in rd the use of tax credits in contrast is unrelated to a firm s productivity our results suggest that r d tax incentives and r d subsidies are not substitutes and that any unintended misallocation of support is likely to persist

intertemporal preferences and labor supply in this paper the authors examine whether nonseparable preference structures ar e important in characterizing life cycle labor supply using longitud inal data on prime age males from the panel study of income dynamics they estimate a model of life cycle leisure and consumption under un certainty in which intertemporal preferences are allowed to be nonsep arable in leisure the model tests several alternative specifications considered in the literature they investigate the robustness of the ir findings to certain forms of population heterogeneity and types of model misspecification across alternative specifications the autho rs find that the standard assumption of intertemporally separable pre ferences for leisure is not consistent with the data copyright 1988 by the econometric society

competitive equilibrium cycles recently there has been a surge of interest in endogenous business cycles that arise in competitive laissez faire economies in the context of standard overlapping generations economies conditions for the existence of equilibrium cycles have been given by grandmont 1983 and by benhabib and day 1982 models of the economy with extrinsic uncertainty or sunspots that have been developed by shell 1977 and by cass and shell 1983 see also balasko 1983 can also lead to equilibrium cycles

intertemporal substitution in labor supply evidence from micro data the sensitivity of the supply of labor to intertemporal variation in the wage is an important issue in macroeconomics the analysis of social security and pensions and the study of life cycle patterns of work this paper explores two approaches to the measurement of intertemporal substitution that have appeared in the literature the first approach is to use consumption to control for wealth and unobserved expectations about future wages in the labor supply equation the second approach is to estimate a first difference equation for hours in which labor supply from the previous period serves as a control for wealth and wage expectations the results indicate that intertemporal substitution elasticity for married men is positive but small

testing intertemporal substitution implicit contracts and hours restriction models of the labor market using micro data we present new tests of three theories of the labor market intertemporal substitution hours restrictions and implicit contracts the intertemporal substitution test we implement is an exclusion test robust to many specification errors and we consistently reject this model we model hours restrictions as part of an endogenous switching model we compare the implicit probit equation to an unrestricted probit equation for unemployment and reject the hours restriction model for the implicit contracts model we estimate non separable within period labor supply and consumption equations we test a cross equation restriction of the model and cannot reject the implicit contracts model jel e30 j22 j60

determinants of business cycle comovement a robust analysis abstract this paper investigates the determinants of business cycle comovement between countries our dataset includes over 100 countries both developed and developing we search for variables that are robust in explaining comovement using the approach of leamer amer econom rev 73 1983 31 variables considered are i bilateral trade between countries ii total trade in each country iii sectoral structure iv similarity in export and import baskets v factor endowments and vi gravity variables we find that bilateral trade is robust however two variables that the literature has argued are important for business cycles industrial structure and currency unions are found not to be robust

evidence for common features in g7 macroeconomic time series systems of economic data potentially exhibit a number of common features which aid both econometric modelling and economic interpretation this paper surveys a variety of common features and applies the corresponding testing and estimation techniques to systems of macroeconomic time series in the g7 countries strong evidence is found of common trends and common or co dependent cycles in the data and for two countries empirical support for common non linearities

trade costs and the home market effect most of the theoretical and empirical studies on the home market effect hme assume the existence of an outside good that absorbs all trade imbalances and equalizes wages we study the consequences on the hme of removing this assumption the hme is attenuated and more interestingly it becomes non linear the non linearity implies that the hme is more important for very large and very small countries than for medium size countries the empirical investigation conducted on a database comprising 25 indus tries 25 countries and 7 years con rms the presence of the hme and of its non linear shape

the sensitivity of consumption to transitory income estimates from panel data on households we investigate the stochastic relation between income and consumption specifically consumption of food within a panel of about 2 000 households our major findings are 1 consumption responds much more strongly to permanent than to transitory movements of income 2 the response to transitory income is nonetheless clearly positive 3 a simple test independent of our model of consumption rejects a central implication of the pure life cycle permanent income hypothesis the observed covariation of income and consumption is compatible with pure life cycle permanent income behavior on the part of80 percent of families and simple proportionality of consumption and income among the remaining 20 percent as a general matter our findings support the view that families respond differently to different sources of income variations in particular temporary income tax policies have smaller effects on consumption than do other more permanent changes in income of the same magnitude this abstract was borrowed from another version of this item

real business cycle models and the forecastable movements in output hours and consumption the authors study the movements in output consumption and hours that are forecastable from a vector autoregression and analyze how they differ from those predicted by standard real business cycle models they show that actual forecastable movements in output have a variance about one hundred times larger than those predicted by the model the authors also find that forecastable changes in the three series are strongly positively correlated with each other on the other hand for parameters whose implications are plausible in other respects the model implies that output consumption and hours should not all be expected to move in the same direction copyright 1996 by american economic association

consumption liquidity constraints and asset accumulation in the presence of random income fluctuations recent empirical research flavin 1981 hagashi 1982 has rejected the certainty equivalent formulation of permanent income hypothesis hall 1978 these findings are often attributed to households inability to borrow completely against expected future labor income this paper is a theoretical investigation of optimal consumption behavior under risk aversion random income fluctuations and borrowing restrictions our principle objective is to establish the existence and to investigate the properties of the stationary probability distribution which characterizes the asymptotic behavior of consumption under these conditions this abstract was borrowed from another version of this item

financial institutions and markets across countries and over time this article introduces the updated and expanded version of the financial development and structure database the database includes indicators on the size efficiency and stability of banks nonbank financial institutions and equity and bond markets over 1960 2007 it also contains indicators of financial globalization

statistical dynamics and economics abstract it is shown in this paper how complex economic dynamics can be characterized using the statistical or distributional theory of dynamical systems the basic concepts of the latter are summarized then applications to supply and demand adjustments in competitive markets aggregate business fluctuations and economic growth in the very long run are briefly reviewed

heterogeneous beliefs and housing market boom bust cycles abstract this paper presents a business cycle model capturing the stylized features of housing market boom bust cycles in developed countries the model implies that over optimism of mortgage borrowers generates housing market boom bust cycles if mortgage borrowers are credit constrained and savers do not share their optimism this result holds without price stickiness if price stickiness is introduced into the model then the model replicates a low policy interest rate during a housing boom as an endogenous reaction to a low inflation rate given a taylor rule thus monetary easing observed during housing booms are consistent with the presence of over optimism causing boom bust cycles

intertemporal substitution and constraints on labor supply evidence from panel data intertemporal substitution and constraints on labor supply evidence from panel data i introduction through much of the 1970s and 1980s macroeconomic stabilization analysis has been dominated by equilibrium models in which fluctuations in employment result from intertemporal substitution workers voluntarily vary their labor supply over time in response to movements in wages and interest rates a number of recent empirical tests of intertemporal substitution models for example altonji 1982 mankiw et al 1985 ham 1986 strongly reject the intertemporal substitution approach these results have led some economists to reject equilibrium macro models in favor of keynesian models in which workers face quantity constraints on labor supply in keynesian models employment fluctuations result from changes in the severity of constraints that is changes in involuntary unemployment rather than intertemporal substitution on the other hand many economists remain unconvinced by recent rejections of intertemporal substitution models because the results are consistent with many possible explanations for tractability empirical studies always impose restrictive assumptions such as separability of utility over time and between goods or such as the existence of a representative consumer data also suffer from numerous problems such as aggregation bias measurement error and the use of average rather than marginal wage rates consequently even the authors of the studies seem hesitant to draw firm conclusions they often simply conclude that workers behavior is explained either by quantity constraints or by a more complicated intertemporal substitution model than the one they have tested 1 this paper attempts to determine which of these explanations is correct are changes in employment a sophisticated form of intertemporal substitution or are they involuntary the crucial data come from questions in the panel study of income dynamics about whether workers experience unemployment or are unable to work as many hours as they want following ham 1982 1986 this information is used to classify workers as quantity constrained in their labor supply or unconstrained i then test a simple intertemporal substitution model for each group of workers if the tests suffer from overly restrictive utility functions or data problems then the model should be rejected for both samples on the other hand if some workers truly face quantity constraints then the model should perform better for the sample of unconstrained workers 2 the tests yield two main results first the model indeed performs worse for the constrained workers for this group the data reject the model s overidentifying restrictions and the parameter estimates contradict the model in contrast the results for the unconstrained workers are weakly consistent with the model as keynesian theories suggest quantity constraints alter workers behavior second the estimates of the intertemporal labor supply elasticity for prime age men are close to zero even for unconstrained workers even if workers are free to vary their hours they apparently choose to respond little to movements in wages the paper addresses two other issues first do constraints on borrowing influence labor supply in the intertemporal substitution model workers borrow and lend to smooth consumption while varying hours of work as this suggests the model performs best for workers who not only face no labor supply constraints but who also own substantial assets and thus are unlikely to face liquidity constraints finally the paper proposes a new approach to identifying intertemporal labor supply equations previous micro studies do not adequately address the problem that wages are correlated with unobservable characteristics that affect tastes for work i propose two identifying restrictions 1 changes in tastes are uncorrelated with levels of time in variant variables and 2 changes in tastes have no aggregate component

duality and liquidity constraints under uncertainty a dual approach to the problem of maximizing lifetime utility subject to liquidity constraints in discrete time leads to a dual dynamic programming formulation which links commodity and asset demand theory under uncertainty with frisch demand theory we establish the existence of a threshold level of wealth that characterizes constrained behavior we explore the power of the dual approach for empirical work

beyond the home market effect market size and specialization in a multi country world the standard two country model of international trade with monopolistic competition predicts a more than proportional relationship between a country s share of world production of a good and its share of world demand for that same good a result known as the home market effect we first show that this prediction does not generally carry through to the multi country case as production patterns are crucially affected by third country effects we then derive an alternative prediction that holds whatever the number of countries considered this new prediction takes into account important features of the real world such as comparative advantage due to cross country technological differences and lack of factor price equalization c 2009 elsevier b v all rights reserved

functional forms for labor supply and commodity demands with and without quantity restrictions one of the most important current questions in economic analysis is whether or not labor markets clear in the short run to answer this it is necessary to be able to distinguish between restricted and unrestricted behavior by consumers supplying labor this paper investigates the forms of preferences which lie behind linear models of labor supply and derives the functional forms for commodity demands which accompany them both with and without quantity restrictions in the labor market simple linkages between restricted and unrestricted demands are also considered as is the question of perfect aggregation over consumers in the presence of quantity restrictions

international evidence on the size of the random walk in output this paper contributes three extensions of cochrane s work on measuring the relative stability of long term growth it estimates variance ratios for nine oecd countries over the period 1871 1985 presents an improved approximation to the distribution of the variance ratio and considers the comovements of long growth cycles across countries the evidence indicates that the relative stability of long term growth found by cochrane is unique to the united states relative to the united states most countries have more variable dynamics at low frequencies and smoother dynamics at frequencies traditionally associated with business cycles

unemployment and liquidity constraints summary we present a dynamic framework for the interaction between borrowing liquidity constraints and deviations of actual hours from desired hours both measured by discrete valued indicators and estimate it as a system of dynamic binary and ordered probit models with panel data from the panel study of income dynamics we analyze a household s propensity to be liquidity constrained by means of a dynamic binary probit model we analyze qualitative aspects of the conditions of employment namely whether the household head is involuntarily overemployed voluntarily employed or involuntarily underemployed or unemployed by means of a dynamic ordered probit model we focus on the possible interaction between the two types of constraints we estimate these models jointly using maximum simulated likelihood where we allow for individual random effects along with an autoregressive process for the general error term in each equation a novel feature of our method is that it allows for the random effects to be correlated with regressors in a time invariant fashion our results provide strong support for the basic theory of constrained behavior and the interaction between liquidity constraints and exogenous constraints on labor supply copyright 2007 john wiley sons ltd

the cyclical component of u s economic activity quarterly data on industrial production and deflated gross national product in the united states from 1947 through 1985 are decomposed into independent nonstationary trend and stationary cycle components using kalman filtering and smoothing techniques estimates of the model parameters imply that at least half of the quarterly innovation in u s economic activity can be attributed to a stationary cyclical component that persists over periods of time as long as five years this finding is inconsistent with the hypothesis that most of the apparent variation in u s economic activity can be attributed to a nonstationary trend component

sources of complex dynamics in two sector growth models this paper develops a tractable multisectoral dynamic equilibrium model and provides a fairly complete analysis of the dynamics that may arise along the intertemporal competitive equilibrium path despite the fact that the environment displays neither random nor deterministic variability the model may produce oscillations in aggregate variables such as output consumption and investment we show that these oscillations can be exactly periodic of any finite period i and even totally aperiodic chaotic we characterize the parameter values for which each of these cases occur but also provide some strong global asymptotic stability results

the relationships between permanent and transitory movements in u s output and the unemployment rate this paper estimates the permanent and transitory movements in u s output and the unemployment rate and the relationships between them the results suggest that permanent movements in u s output and the unemployment rate are important for explaining overall fluctuations further the correlation between changes in these series arises in large part due to the relationship between their permanent components

testing whether unemployment represents intertemporal labour supply behaviour in the lucas rapping 1969 model of the labour market fluctuations in unemployment represent individuals optimally adjusting their labour supply behaviour in response to fluctuations in wage rates over the business cycle in this paper i propose and implement a misspecification test of the lucas rapping treatment of unemployment as labour supply behaviour using panel data this test extends previous such work with micro data by simultaneously allowing for intertemporal substitution uncertainty and endogenous unemployment using the standard specification of intertemporal labour supply behaviour i find strong evidence against this interpretation of unemployment there are two possible interpretations of the test results the first is that it is necessary to turn to alternative models of the labour market in which unemployed workers are off a supply function the second is that the test results indicate the necessity of moving to more complex models of intertemporal substitution however given current econometric techniques and data sets these alternative models of intertemporal substitution will be extremely difficult to test

constraints on the choice of work hours agency versus specific capital lifetime contracts imply that at a given time wages and value of marginal product vmp will diverge the contract will specify hours as well as wages since firms will desire to prevent workers from working more when the wage is greater than vmp and from working less when the wage is less than vmp if hours are set efficiently workers will face binding hours constraints the agency model and the firm specific capital models make opposite predictions regarding the relation between work hours constraints and job tenure we test these predictions our results indicate that neither model explains the observed pattern of hours constraints

currency unions and international integration this paper characterizes the integration patterns of international currency unions such as the cfa franc zone we empirically explore different features of currency unions and compare them to countries with sovereign monies by examining the criteria for mundellos concept of an optimum currency area we find that members of currency unions are more integrated than countries with their own currencies for instance we find that currency union members have more trade and less volatile real exchange rates than countries with their own monies business cycles are more highly synchronized across currency union countries than across countries with sovereign monies

durable capital and chaos in competitive business cycles abstract this study constructs an example of chaotic optimal accumulation that results from the existence of the limitation of capital depreciation an example is an extension of the model developed by weitzman

international real business cycles we ask whether a two country real business cycle model can account simultaneously for domestic and international aspects of business cycles with this question in mind we document a number of discrepancies between theory and data the most striking discrepancy concerns the correlations of consumption and output across countries in the data outputs are generally more highly correlated across countries than consumptions in the model we see the opposite

estimation of a labour supply model with censoring due to unemployment and underemployment this study proposes and implements a method of labour supply estimation which is appropriate when the sample contains unemployed and underemployed workers the estimation method consists of excluding unemployed and underemployed workers from the sample and then using to avoid selection bias an extension of heckman s approach to the case where two correlated selection rules generate the sample hausman s specification test is then used to determine whether ignoring constrained workers has led to biases in traditional labour supply estimates and the empirical results suggest that previous estimates of several important parameters are biased since the biases go in the direction that would be predicted by the hypothesis that the unemployed and underemployed are constrained the results support this hypothesis