a simple model of growth cycles with technology choice abstract in this study we develop a simple computable overlapping generations model that exhibits endogenous fluctuations the key assumption is that a firm can choose from multiple technologies of production since the model reduces to a piecewise linear map on the unit interval it allows us to conduct an in depth analysis of its dynamic properties particularly this piecewise linearization reveals the ability of the model to exhibit periodic attracting cycles of an arbitrarily large period as well as non periodic attractors furthermore it is demonstrated that the occurrence of periodic patterns is completely characterized by the rotation number or the devil s staircase

the commuting time paradox abstract we examine the conditions for the commuting time paradox which states that the average commuting time does not vary between different periods we develop therefore an equilibrium job search model with endogenously chosen commuting costs presuming wage bargaining between workers and firms the optimally chosen maximum commuting costs jointly maximise the worker s and firm s payoffs we demonstrate that when productivity levels increase over time average commuting costs and average wages both increase which affects the optimally chosen commuting time we establish the conditions under which the paradox holds

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

debt deleveraging and the liquidity trap a fisher minsky koo approach in this paper we present a simple new keynesian style model of debt driven slumps that is situations in which an overhang of debt on the part of some agents who are forced into rapid deleveraging is depressing aggregate demand making some agents debt constrained is a surprisingly powerful assumption fisherian debt deflation the possibility of a liquidity trap the paradox of thrift a keynesiantype multiplier and a rationale for expansionary fiscal policy all emerge naturally from the model we argue that this approach sheds considerable light both on current economic difficulties and on historical episodes including japan s lost decade now in its 18th year and the great depression itself

how important is precautionary saving we estimate how much of the wealth of a sample of psid respondents is held because some households face more income uncertainty than others we begin by solving a theoretical model of saving which we use to develop appropriate measures of uncertainty we then regress measures of wealth on our measures of uncertainty and find evidence that households engage in precautionary saving finally we simulate the wealth distribution that our empirical results imply would prevail if all households had the same uncertainty as the lowest uncertainty group we find that between 39 and 46 percent of wealth in our sample is attributable to the extra uncertainty that some consumers face compared to the lowest uncertainty group

housing tenure and labor market impacts the search goes on abstract we develop two search theoretic models emphasizing firm entry to examine the oswald hypothesis the idea that homeownership is linked to inferior labor market outcomes and compare their predictions to three extant theories the five models have surprisingly different predictions about the labor market at both the aggregate and micro levels using a suitable instrumental variable strategy we estimate both micro and aggregate level regression models of wages and unemployment and compare the estimates to those predictions we find that while homeowners are less likely to be unemployed they also have lower wages all else equal compared to renters in addition higher regional homeownership rates are associated with a greater probability of individual worker unemployment and higher wages the outcome of a horserace between our new search theoretic models is mixed the wage posting model predicts observed unemployment impacts while a bargaining variant does a better job explaining observed wages and aggregate labor market outcomes overall we conclude that firm behavior is important for understanding the labor market impacts of homeownership because this is the case regional homeownership rates are not good instruments for individual tenure choice in empirical work and while individual homeowners may have inferior labor market outcomes as compared to renters from the viewpoint of society higher homeownership rates may result in greater job creation and overall production among other benefits

job search and mobility in developing countries theory and policy implications abstract a labor market model is developed in which the formal sector is characterized by search frictions whereas the informal sector is competitive we show that there exists a unique steady state equilibrium in this dual economy we then consider different policies financed by a tax on firms profits we find that reducing the unemployment benefit or the firms entry cost in the formal sector induces higher job creation and formal employment reduces the size of the informal sector but has an ambiguous effect on wages we also find that an employment wage subsidy policy and a hiring subsidy policy have different implications in particular the former increases the size of the informal sector while the latter decreases it

credit mismatch and breakdown abstract this paper studies the phenomenon of mismatch in a decentralized credit market where borrowers and lenders must engage in costly search to establish credit relationships our dynamic general equilibrium framework integrates incentive based informational frictions with a matching process highlighted by i borrowers endogenous market entry and exit decision entry frictions and ii time and resource costs necessary to locate credit opportunities search frictions a key feature of the incentive compatible loan contract negotiated between borrowers and lenders is the interaction of informational frictions in the form of moral hazard with entry and search frictions we find that the removal of entry barriers can eliminate incentive based equilibrium credit rationing more generally entry and incentive frictions are important in understanding the extent of credit rationing and credit mismatch while search and incentive frictions are important for understanding credit market breakdown

the household fallacy we refer to the idea that government must tighten its belt as a necessary policy response to higher indebtedness as the household fallacy we provide a reason to be skeptical of this claim that holds even if the economy always operates at full employment and all markets clear our argument rests on the fact that in an overlapping generations olg model changes in government debt cause changes in the real interest rate that redistribute the burden of repayment across generations we do not rely on the assumption that the equilibrium is dynamically inefficient and our argument holds in a version of the olg model where the real interest rate is always positive

neighborhood crime and young males job opportunity abstract a puzzling aspect of america s crime problem is the concentration of crime in poor inner city neighborhoods the economic model of crime suggests that this concentration may be caused by a dearth of legitimate earnings opportunities for young males living in these neighborhoods while studies on spatial mismatch in the low skilled labor market have documented the relatively poor job opportunity possessed by youth in these neighborhoods there exists no evidence on the role job opportunity plays in explaining the dramatic spatial variation in crime within urban areas using a unique panel of neighborhood crime and employment data for atlanta i estimate models that control for time and fixed effects as well as the possible endogeneity of job opportunity the results suggest that young males job opportunity plays a key role in resolving the enigma surrounding the high variation in crime across urban neighborhoods

the emergence of chaos from classical economic growth this paper shows how fluctuations of an erratic and unstable nature can emerge from the classical deterministic economic growth process implications of the analysis would appear to be at least two first pronounced changes in the way an economy behaves need not cause us to reject our understanding of how it works second we need not seek in exogenous forces an explanation as to why behavioral patterns change and why it may be so difficult to anticipate future events from the profile of past experience

learning matching and growth we examine an endogenous growth model in which market frictions are an integral part of the economic environment workers invest in education when young which raises their productivity onice employed the level of schooling also acts as a key determinant of the rate of economic growth by influencing workers ability to accumulate additional human capital on the job once schooling is completed workers search for employment the division of the surplus between vacancies and searching workers is characterized as is the optimal level of education the economy may display multiple steady state growth paths

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

job information networks neighborhood effects and inequality this paper explores the theoretical and empirical literature to examine the use by different social groups of informal sources of information provided by friends relatives and acquaintances during job search and its consequences for the job market it also addresses the role of network structure and size the resource endowments of contacts and nature of the links between contacts to explain differences in the effects of job information networks in doing so the paper also turns to the sociology literature on job information networks and provides an economic perspective on such sociological concepts as strong versus weak ties inbreeding distance from structural holes etc the paper distinguishes between models of exogenous job information networks that is where individuals obtain job related information through a given social structure and endogenous job information networks which are social networks that result from individuals uncoordinated actions the paper pays special attention to such issues as physical and social proximity and sharing of information and discusses them in the context of the recent social interactions and neighborhood effects literature finally the paper outlines a model that integrates job information networks where interactions occur in business cycle frequencies with the dynamics of human capital formation which include the joint effects of parental community and neighborhood human capital and are set in life cycle frequencies for the purpose of organizing suggestions for future research and examining earned income inequality

does city structure affect job search and welfare we develop a model in which workers search efficiency is negatively affected by access to jobs workers location in a city is endogenous and reflects a trade off between commuting costs and the surplus associated with search different configurations emerge in equilibrium notably the unemployed workers may reside far away segregated city or close to jobs integrated city we prove that there exists a unique and stable market equilibrium in which both land and labor markets are solved for simultaneously we find that despite inefficient search in the segregated city equilibrium the welfare difference between the two equilibria is not so large due to differences in commuting costs we also show how a social planner can manipulate wages by subsidizing taxing the transport costs and can accordingly restore the efficiency

how should public pension plans invest how public pension plan assets should be invested is an important but unsettled question alicia h munnell and mauricio soto 2007 find that the share of state and local s l plan assets held in equities has grown over time largely in parallel with private sector practices from an average of about 40 percent in the late 1980s to about 70 percent in 2007 this exposure led to a loss of an estimated 1 trillion dollars following the decline of the stock market from october 2007 to october 2008 munnell kelly haverstick and jean pierre aubry 2008 nevertheless some observers endorse the standard practice of investing heavily in higher yielding but riskier equities reasoning that the higher average returns will reduce future required tax receipts and also help to reduce underfunding over time others advocate a more conservative approach that reduces the volatility of funding levels and the likelihood of severe shortfalls during economic downturns when government resources are already constrained e g lawrence n bader and jeremy gold 2007 the accounting rules for public pensions create a perverse incentive to invest in stocks since projected liabilities are discounted at the expected return on assets rather than at a rate that reflects the generally lower risk of liabilities investing the assets in the stock market leads to

observational equivalence of the overlapping generations and the cash in advance economies abstract this paper demonstrates that any equilibrium in an overlapping generations economy a la grandmont 1985 can be supported as an equilibrium in a cash in advance economy a la lucas and stokey 1987 and vice versa thus business cycles could occur at real life frequencies

on endogenous competitive business cycles the belief that the long run equilibrium of a competitive monetary economy that does not experience any exogeneous shocks whether originating from the external environment or from policy should be modelled as a state that is stationary or perhaps growing at a constant rate seems to be deeply rooted in the mind of some economists

informal job search and black youth unemployment in this paper i analyze how young black and white unemployed jobseekers use various methods of search and the employment outcomes which result from their use the focus is on distinguishing informal search methods i e friends and relatives or direct application without referral from more formal ones in analyzing racial differences the results show that the two informal methods of search account for about 90 of the difference in employment probabilities between white and black youth this also accounts for 57 71 of the difference in unemployment rates between the two furthermore most of these results reflect differences in the ability of these methods to generate job offers as opposed to differences in search effort or job acceptance rates however our ability to explain these differences through personal family and household characteristics was generally quite limited this abstract was borrowed from another version of this item

job accessibility and female employment probability the cases of barcelona and madrid the objective of this paper is to estimate the impact of residential job accessibility on female employment probability in the metropolitan areas of barcelona and madrid following a spatial mismatch framework a female employment probability equation is estimated which includes variables controlling for personal characteristics residential segregation and employment potential by public transport network data used come from the micro census 2001 of ine the national institute of statistics the research focuses on the treatment of endogeneity problems and the measurement of accessibility variables the results show that low job accessibility in public transport negatively affects employment probability the intensity of this effect tends to decrease with individual s educational attainment a higher degree of residential segregation also reduces job probability in a significant way

rational choice and erratic behaviour in this paper we show that rational choice in a stationary environment can lead to erratic behaviour when preferences depend on experience we mean by erratic behaviour choice sequences that do not converge to a long run stationary value or to any periodic pattern early investigations of the effects of experience on choice goes back to pareto see also benhabib 1979 some keynesian theories of the consumption function incorporate the effects of experience and habit formation on current levels of consumption duesenberry 1949 modigliani 1949 and brown 1952 a general model of experience dependent choice was described in day 1970 and investigated in day and kennedy 1971 while the specific issue of the existence of stable representable long run consumer demand when tastes vary endogenously has been treated by gorman 1967 pollak 1970 1976 weizsaicker 1971 mccarthy 1974 and hammond 1976 pollak gave conditions for the representability of long run choice when the equations of preference dependence are linear and utility additive hammond in a generalization of these findings provides conditions for stable representable long run choice when preferences are acyclic a condition which in essence assures convergence to a long run choice

job search in thick markets abstract i analyze empirically the effects of urban and industrial agglomeration on both search behavior and the efficiency of matching the analysis is based on a unique panel data set from the italian labor force survey micro data covering 520 randomly drawn local labor market areas 66 of the total over the four quarters of 2002 i compute transition probabilities from non employment to employment by jointly estimating the probability of searching and the probability of finding a job conditional on having searched i then test whether these are affected by market size industrial variety and or industry specialization the main results indicate that market size and industry specialization raise job seekers chances of finding employment conditional on having searched while industrial variety is not significantly different from zero finally the effect of agglomeration on non employed individuals search behavior cannot be significantly distinguished from zero

racial discrimination and redlining in cities we propose a model where employers have two types of prejudices racial and spatial discriminations because of the rst one black workers have less chance than white workers to nd a job because of the second one workers living closer to the city center have less chances than suburban workers to nd a job in this context we show that depending on the importance of access costs to employment centers two urban equilibria may emerge in equilibrium 1 the access cost for blacks is quite large black and white workers are totally separated while in equilibrium 2 the access cost for blacks is relatively small workers are separated by their employment status the unemployed versus the employed we then study the labor market equilibrium and its interactions with the land market we show in particular that both race and space matter to explain high unemployment rates among blacks

city structure search and workers job acceptance behavior abstract this paper develops a stochastic search model having a monocentric city structure and investigates how city structure affects workers job acceptance behavior and a labor market in the model workers reside in a city and commute to the central business district cbd to work when employed and to be interviewed when unemployed when a job searcher contacts a firm having a vacant job he she observes the level of training costs necessary for employment and decides whether to accept the job it is shown that there exists a unique market equilibrium in which the employed live close to the cbd and the unemployed reside far away from the cbd analysis shows that 1 improvement of commuting technology induces job searchers to accept more costly jobs and lowers the unemployment rate in the city 2 growth of the city makes job searchers less tolerant of training and raises the unemployment rate and 3 as job searchers search more intensively they become choosier if commuting costs are sufficiently small efficiency properties of the equilibrium are also explored

job access employment and earnings outcomes for welfare leavers in a us urban labour market this article examines the effect of job access on employment outcomes for welfare recipients in cleveland ohio leaving assistance during 1998 2000 a rich longitudinal dataset is employed combining administrative and survey data with multiple measures of access to and competition for jobs the focus is on both a population and a range of measures of employment outcomes not previously studied in this context empirical ambiguity in the existing literature has resulted from the difficulty of modelling causality when employment and residential location are jointly determined in this study labour market outcomes are related to the residential locations of welfare leavers prior to employment thus overcoming much potential endogeneity virtually no evidence is found that job access influences labour market outcomes for this population

sorting by foot travel for local public goods and equilibrium stratification we re examine tiebout s hypothesis of endogenous sorting in a competitive spatial equilibrium framework by considering both income and preference heterogeneity and by allowing agents to decide endogenously the number of visits to a travel for local public good the equilibrium configuration may be completely segregated incompletely segregated or completely integrated depending on relative market rents and income preference local tax parameters a segregated equilibrium may feature endogenous sorting purely by income or by both income and preferences while the rich need not be closer to the local public facility site multiple equilibria may arise when the equilibrium configuration is incompletely segregated jel classification d50 h41 classification par deplacement biens publics locaux accessibles par deplacement et stratification d equilibre les auteurs reexaminent l hypothese de tiebout de classification endogene dans un cadre d equilibre spatial concurrentiel en tenant compte a la fois de l heterogeneite des revenus et des preferences ainsi qu en permettant aux agents de decider de maniere endogene du nombre de visites pour se procurer un bien public local par deplacement il peut s ensuivre des equilibres de segregation complete de segregation incomplete ou d integration complete selon les rentes relatives et les parametres de revenus de preferences ou de fiscalite locale un equilibre de segregation peut entrainer une classification endogene sur la base seulement des revenus ou sur la base des revenus et des preferences alors que les riches n ont pas besoin d etre plus proches du site du bien public local des equilibres multiples peuvent surgir quand la configuration d equilibre en est une de segregation incomplete

the impact of surplus sharing on the portfolio mix of public sector defined benefit pension plans a public choice approach the riskiness of state employee pension plan portfolios varies across states we investigate whether this variation is related to how public employees and taxpayers share actuarial surpluses of pension accounts we focus on two determinants of a plan s asset mix the relative influence of public employees to taxpayers and whether a surplus sharing contract is specified our theoretical model demonstrates that the effect of public employee influence on the asset mix is ambiguous our empirical results corroborate this complex theoretical result in our theoretical and empirical analyses if a surplus sharing rule is specified plans adopt a more aggressive investment allocation

car ownership and the labor market of ethnic minorities we show how initial wealth differences between low skilled minorities and white workers can generate differences in their labor market outcomes this even occurs in the absence of a taste for discrimination against ethnic minorities or exogenous differences in distance to jobs because of the initial wealth difference minorities cannot afford to buy a car while whites can car ownership allows whites to reach more jobs per unit of time which gives them a better bargaining position in the labor market as a result in equilibrium ethnic minorities end up with both higher unemployment rates and lower wages than whites furthermore we also show that it takes more time for minorities to reach their jobs even though they travel less miles when employed those predictions are consistent with the data better access to capital markets or better public transportation will reduce the differences in labor market outcomes

spatial mismatch search effort and urban spatial structure abstract the aim of this paper is to provide a new mechanism for the spatial mismatch hypothesis spatial mismatch can here be the result of optimizing behavior on the part of the labor market participants in particular the unemployed can choose low amounts of search and long term unemployment if they reside far away from jobs they choose voluntary not to relocate close to jobs because the short run gains low land rent and large housing consumption are big enough compared to the long run gains of residing near jobs higher probability of finding a job

externalities internalization and fluctuations in this paper the authors introduce consumption externalities as developed by k arrow in overlapping generations economies they show how the internalization of externalities through exchanges at markets for externalities may give rise to new phenomena such as altered stability properties and fluctuations even though it restores optimality copyright 1997 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

decentralized international exchange traditional models of international trade take place within trading environments in which trade is coordinated by a walrasian auctioneer who instantly matches buyers and sellers in world markets this assertion seems inconsistent with evidence suggesting that trading arrangements seem to economize on transactions costs associated with international trade recognizing these insights we depart from standard models of international trade by incorporating the difficulties in the coordination of exchange within a two country random matching model of international trade we capture a motivation for trade through comparative advantage and interpret trade across economies to be associated with an agent s endogenous choice to participate in foreign markets although an individual may decide to search abroad to obtain additional gains from trade resulting from comparative advantage she is less likely to meet trading partners abroad as search frictions are higher in the foreign country than in the domestic market using this framework we show that international trade is associated with convergence in relative prices across countries we also show that the extent of market frictions in the foreign country affects relative prices the volume of international trade and welfare levels due to market participation externalities associated with international trade we show that a movement from autarky to free trade may actually lower welfare levels we conclude by examining the possible inefficiencies associated with international trade due to the decentralized nature of exchange and the policy implications of our model

confidence crashes and animal spirits this article is an attempt to reformulate what i take to be two key insights from keyness general theory keynes 1936 the first is that there is something profoundly different about the labour market from most other markets in the economy the second is that the beliefs of participants in the asset markets have an independent influence on economic activity in the language of modern dynamic general equilibrium theory we would say that there is a continuum of labour market equilibria and that beliefs about the value of the stock market select an equilibrium the general theory contains many ideas some of which are internally inconsistent and keynes did not try to reconcile his theory with walrasian economics that task was carried out by a group of interpreters including hansen 1936 and hicks 1937 the current dominant paradigm new keynesian economics originated with the third edition of samuelson s 1955 undergraduate textbook in which he introduced the idea of the neoclassical synthesis according to this doctrine the economy is keynesian in the short run but classical in the long run the short run is defined as the period over which not all prices have had time to adjust to their walrasian levels this article introduces a different interpretation of the key ideas from the general theory 1 although my work is inspired by keynesian economics this article is not about the history of thought i offer a way of formulating the idea that market economies are not inherently self stabilising without assuming that prices or wages are prevented from adjusting to their equilibrium levels by some kind of friction instead i claim that high persistent unemployment is a potentially permanent feature of a market economy in a steady state equilibrium

spatial mismatch in search equilibrium we construct a search equilibrium model for a city with central and suburban labor markets that is consistent with the set of empirical regularities commonly associated with the spatial mismatch hypothesis a higher rate of unemployment for central city residents than suburban residents a higher job vacancy rate for suburban firms and reverse commuting and higher suburban wages the effectiveness and welfare implications of public policy programs that might be used to remedy the underlying mismatch are examined

endogenous job destruction and job matching in cities we propose a spatial search matching model where both job creation and job destruction are endogenous workers are ex ante identical but not ex post since their jobs can be hit by a technological shock which decreases their productivity they reside in a city and commuting to the job center involves both pecuniary and time costs as a result workers with high wages are willing to live closer to jobs to save on time commuting costs we show that in equilibrium there is a one to one correspondence between the productivity space and the urban location space workers with high productivities and wages reside close to jobs have low per distance commuting costs and pay high land rents we also show that higher per distance commuting costs and higher unemployment benefits lead to more job destruction

the spatial mismatch hypothesis what has the evidence shown this paper reviews 20 years worth of empirical evidence on the spatial mismatch hypothesis after briefly surveying the relevant models from urban and labour economics and recent trends in employment and population suburbanisation the empirical evidence on spatial effects is examined this literature includes evidence on the effects of residential segregation residential suburbanisation and employment suburbanisation and direct measures of access such as travel times the most recent evidence suggests that spatial mismatch is relevant for explaining black white employment differences though the magnitudes of these effects remain unclear

population and the environment a parable of firewood and other tales the author analyzes the relationship between population and the environment with a focus on the role which environmental degradation and natural resources depletion may play in producing the population pressure which lies behind such degradation and depletion especially in developing countries the principal conclusion of this analysis is that the possibilities for a stable equilibrium between human population and its environment are quite limited i show that parental altruism toward their children can only make matters worse if socially unchecked by leading to an increase of the birthrate in every environmental state in comparison with that which would occur in its absence excerpt

spatial versus social mismatch the aim of this paper is to provide a new mechanism based on social interactions explaining why distance to jobs can have a negative impact on workers labor market outcomes especially ethnic minorities building on granovetter s idea that weak ties are superior to strong ties for providing support in getting a job we develop a model in which workers who live far away from jobs choose to have less connections to weak ties because of the lack of good public transportation in the us it is costly both in terms of time and money to commute to business centers to meet other types of people who can provide other source of information about jobs if distant minority workers mainly rely on their strong ties who are more likely to be unemployed there is then little chance for them of escaping unemployment it is therefore the separation in both the social and physical space that prevents ethnic minorities from finding a job

space and unemployment the labor market effects of spatial mismatch the aim of this article is to analyze the effects of housing discrimination on the wages and unemployment rates of black workers the unemployment effect is first analyzed using a simple minimum wage model an efficiency wage model is then adopted in order to endogenize both unemployment and wages under both models suburban housing discrimination leads to a higher unemployment rate for blacks in the central city than in the suburbs under the efficiency wage model black wages are also lower in the center the analysis thus generates a link between unemployment and a seemingly unrelated phenomenon racial discrimination in the housing market

migration unemployment and development a dynamic two sector analysis abstract a time minimizing problem of attaining a full employment state is solved in a dual economy model with harris todaro migration mechanism and with a positive level of urban unemployment in the starting period it appears that the optimum solution lies in the specialization of investment in the urban sector at least in the initial stage of development if the per capita capital stock in the urban sector is very small in the starting period

the mechanisms of spatial mismatch the spatial mismatch hypothesis smh argues that low skilled minorities residing in us inner cities experience poor labour market outcomes because they are disconnected from suburban job opportunities this assumption gave rise to an abundant empirical literature which is rather supportive of the smh surprisingly it is only recently that theoretical models have emerged which probably explains why the mechanisms of spatial mismatch have long remained unclear and not properly tested this article presents relevant facts reviews the theoretical models of spatial mismatch confronts their predictions with available empirical results and indicates which mechanisms deserve further empirical tests

search in cities the aim of this paper is to expose the recent developments of urban search models which incorporate a land market into a search matching framework using these models we will be able to explain why unemployment rates vary within a city how city structure affects workers labor market outcomes how unemployment benefits and the job destruction rate affect the growth of cities and why workers living far away from job centers search less intensively and experience higher unemployment rates than those residing closer to jobs we are also able to explain why as compared to whites black workers spend more time commuting to work but travel less miles and search for jobs over a smaller area

proposed gasb rules show why only market valuation fully captures public pension liabilities the governmental accounting standards board has released preliminary views on how public sector pension plans should value benefit liabilities because the gasb s proposals ignore government s contingent liability to pay plan benefits should assets fall short they omit the full value of plan liabilities and contradict the gasb s own standard of interperiod equity

workforce location and equilibrium unemployment in a duocentric economy with matching frictions this article examines unemployment disparities and efficiency in a duocentric city where workers are non uniformly distributed between the two job centers we introduce commuting costs and search matching frictions to deal with the spatial mismatch between workers and firms in a decentralized economy job seekers do not internalize a composition externality they impose on all the unemployed with symmetric job centers a change in the distribution of the workforce can lead to asymmetric equilibrium outcomes we calibrate the model for los angeles and chicago metropolitan statistical areas simulations suggest that changes in the workforce distribution have non negligible effects on unemployment rates wages and net output but cannot be the unique explanation of a substantial mismatch problem

endogenous vs exogenously driven fluctuations in vintage capital models in this paper we present a particular case of the creative destruction model of caballero and hammour quart j econ 111 1996 805 851 in which both exogenous and endogenous fluctuation sources are present we show that job creation follows a delayed differential equation with periodic coefficients the delay is equal to the optimal age of capital goods the period of the coefficients is equal to the period of an exogenous profitability cycle we mathematically show that job creation is asymptotically periodic with the same period as the profitability cycle furthermore using an explicit numerical method we find that replacement echoes generally dominate the short run dynamics finally we find that the combination of the two fluctuations sources favors the appearance of asymmetries in job creation and job destruction patterns