a review of the recent empirical literature on displaced workers this article reviews the empirical literature on job displacement job displacement is widespread and strongly countercyclical tending to peak during economic downturns but concentrated in indus

relative price determination in the medium run the influence of wages productivity and international prices this work explores three critical assumptions of the balassa samuelson productivity differential model for the short and medium run wage equalization competitive labor markets and purchasing power parity the data reveal violations in these assumptions for france germany japan the u k and the u s significant wage and unit labor cost differentials exist across industries and traded and nontraded sectors and these differentials do not diminish over time the findings are consistent with the presence of industry and or sectoral specific human capital

absorptive capacity and the effects of foreign direct investment and equity foreign portfolio investment on economic growth abstract this study examines the effects of foreign direct investment fdi and equity foreign portfolio investment efpi on economic growth using data on 80 countries from 1979 through 1998 the results largely suggest that lagged fdi and efpi do not have direct unmitigated positive effects on growth but some data are consistent with the view that the effects of fdi and efpi are contingent on the absorptive capacity of host countries with particular respect to financial or institutional development moreover extreme bound analysis eba of significant results indicates that the estimates are robust compared to other empirical studies on growth

economic growth and institutions some sensitivity analyses 1961 2000 do institutions help explain macroeconomic performance this article addresses two issues first especially given the practical implications of the literature measurement of institutions should avoid tautologies and therefore this study uses econometrics to estimate the effect of objectively measurable institutions such as labor market organization financial development fiscal federalism and political regime type second the growing literature on these promising factors in turn is unfortunately incommensurable because previous studies fail to control for other institutional and in some cases standard economic variables given data on up to ninety four countries from 1961 through 2000 extreme bound analysis eba an econometric technique that addresses the sensitivity of previous findings to alternative assumptions about model specification suggests that some institutions associated with the organization of labor and capital are robust correlates of investment few data support the view that variables related to the organization of the state including fiscal federalism and political regime type affect macroeconomic performance without implication the author thanks richard nelson doug chalmers robert shapiro alessandra casella brendan o flaherty geoffrey garrett alexander hicks brett hammond mark kesselman the editor lisa martin and two anonymous referees for helpful comments also ross levine peter rousseau geoffrey garrett and torben iversen were very helpful in locating data the views expressed in this article do not necessarily reflect those of the board of governors of the federal reserve system or any member of its staff

optimal taxation with endogenously incomplete debt markets abstract empirical analyses of labor tax and public debt processes provide prima facie evidence for imperfect government insurance this paper considers a model in which the government s inability to commit to future policies or to report truthfully its spending needs renders government debt markets endogenously incomplete a method for solving for optimal fiscal policy under these constraints is developed such policy is found to be intermediate between that implied by the complete insurance ramsey model and a model with exogenously incomplete debt markets in contrast to optimal ramsey policy optimal policy in this model is consistent with a variety of stylized fiscal policy facts such as the high persistence of labor tax rates and debt levels and the positive covariance between government spending and the value of government debt sales

sensitivity analyses of anomalies in developed stock markets abstract the literature on anomalies in developed stock markets produces no consensus on specification this study uses extreme bound analysis eba to evaluate the robustness of 15 stock return anomalies given data covering 16 developed markets from may 1984 to march 1999 two factors are sturdy according to the extreme decision rule in the panel design d p and momentum under a less stringent eba criterion long run lagged returns country risk and the january effect are also robust time series eba for individual markets produces one robust result according to relaxed decision rules across a majority of cases long run government bond yields

methods for robust control robust control allows policymakers to formulate policies that guard against model misspecification the principal tools used to solve robust control problems are state space methods see hansen l p sargent t j 2008 robustness princeton university press giordani p soderlind p 2004 solution of macromodels with hansen sargent robust policies some extensions journal of economic dynamics and control 28 12 2367 2397 in this paper we show that the structural form methods developed by dennis 2007 optimal policy rules in rational expectations models new solution algorithms macroeconomic dynamics 11 1 31 55 to solve control problems with rational expectations can also be applied to robust control problems with the advantage that they bypass the task often onerous of having to express the reference model in state space form in addition we show how to implement two different timing assumptions with distinct implications for the robust policy and the economy we apply our methods to a new keynesian dynamic stochastic general equilibrium model and find that robustness has important effects on policy and the economy

output dynamics in real business cycles models the time series literature reports two stylized facts about output dynamics in the united states gnp growth is positively autocorrelated and gnp appears to have an important trend reverting component this paper investigates whether current real business cycle rbc models are consistent with these stylized facts many rbc models have weak internal propagation mechanisms and must rely on external sources of dynamics to replicate both facts models that incorporate labor adjustment costs are partially successful they endogenously generate positive autocorrelation in output growth but they need implausibly large transitory shocks to match the trend reverting component in output

the sullying effect of recessions previous work has established that recessions involve a cleansing effect so that in downturns only high productivity jobs remain but empirical evidence suggests job quality is procyclical jobs created in recessions are likely to be low paying and temporary this paper modifies previous models by adding on the job search which leads to an additional sullying effect calibration of the model suggests this offsetting sullying effect is likely to be much larger than the cleansing effect and can account for the procyclical match quality we observe in the data

the inflation output variability tradeoff and monetary policy evidence from a garch model this paper empirically investigates the taylor curve volatility tradeoff in light of the stochastic behavior of the conditional variances of output and inflation stressing structural instability between periods before and after the 1979 1982 monetary policy regime change i implement a bivariate generalized autoregressive conditional heteroskedasticity model to capture the output inflation variability tradeoff and to explore the plausible impact of a change in the federal funds rate on the two conditional volatilities i further evaluate the impacts of anticipated and unanticipated policy actions measured by two alternative policy reaction functions one from a vector autoregression based reduced form equation and another based on the taylor rule in addition to showing a volatility tradeoff relationship the empirical model reveals different magnitudes of policy effects on output and inflation volatility across the two sample periods

industry specific human capital occupation and firm size evidence from taiwan this paper investigates the importance of various types of human capital and highlights the role played by industry tenure in determining wages in taiwan it also aims to offer possible explanations as to why industry specific human capital is much less significant than it is in the united states empirically it is found that other things being equal accumulating industry tenure decreases earnings for both the least skilled workers and those employed in mid sized firms industry specific skills are not yet deeply implemented in most occupations and firms of all sizes this might also account for the remarkable level of labor reallocation among industries that is observed in taiwan furthermore the capital stock accumulated through education is found to be the most crucial in determining wages in all estimations and a factor considered the engine of growth during the miraculous development of taiwan s economy however the importance of other types of human capital on earnings namely general labor market experience and firm specific human capital varies substantially across groups

robust policymaking in the face of sudden stops abstract this paper considers tax policies to deal with sudden stops declines in aggregate activity that are magnified by a binding collateral constraint that occasionally occur in emerging market economies households and or the government are assumed to face model uncertainty and desire robustness against alternative models welfare gains from optimal taxation are small if the government trusts its model of household expectations whether those expectations are altered by model uncertainty or not in contrast welfare losses are large if the government is uncertain about the household s probability model

deficits government expenditures and tax smoothing in the united states 1929 1988 abstract barro s tax smoothing hypothesis tsh implies that the government runs a budget deficit whenever it anticipates the growth rate of national income to increase or the growth rate of its expenditure to decline we test this implication of the hypothesis by examining the implied cross equation restrictions on a vector autoregression var model using u s data for the period ranging from 1929 to 1988 our formal tests reject the hypothesis for the full sample period but cannot reject it for the post 1947 period further investigations show that the statistical rejection should be attributed to sharp differences in the statistical properties of the pre 1947 and the post 1947 data rather than the failure of the hypothesis itself

sectoral transformation and labour market flows in this chapter we examine the dynamics of adjustment in the labour market and in particular the movement of workers between industries it is often assumed that the speed with which the labour market must adjust has increased due to globalisation and or technological change if this is the case then these forces may be responsible for greater instability in the workplace the displacement of growing numbers of especially unskilled workers from declining sectors longer periods of unemployment and wage losses

testing the positive theory of government finance researchers characterizing optimal tax policies for dynamic economies have reasoned that tax rates should follow a random walk we conduct a frequency domain examination of u s tax rates and reject the hypothesis that the first difference in the series is white noise the source of the rejection is pronounced activity of tax changes at an eight year cycle regression analysis confirms the finding that there is a cyclical component to tax changes corresponding to changes in political party administration the results suggest that the positive theory of government finance needs to be refined to incorporate features of political equilibrium

learning by doing vs learning about match quality can we tell them apart understanding the accumulation of match specific capital is crucial in shedding light on the reasons for the prevalence of long term employ ment relationships and on the welfare consequences of turnover in the labor market one of the most important source of match specific capital is human capital acquired through match specific learning such learn ing can take on two distinct forms in the first case workers accumulate match specific human capital through learning by doing in the second case a worker and a firm in an employment relationship learn about the quality of the match over time thereby acquiring valuable information i construct a structural model that embeds these two learning explana tions i show that it is possible to distinguish the two explanations given turnover data on employing firms coupled with data on workers such data now exist in the form of matched employer employee data sets i use a matched french data set to estimate the structural model using the efficient method of moments a simulation based estimation method i find that while learning by doing could be present in the first few months of an employment relationship learning about match quality dominates at tenures above half a year this finding has important consequences for economists understanding of the sources of match specific capital and for the desirability of policies that alter the incentives for turnover for workers of different tenure

the determinants of earnings a behavioral approach we survey the determinants of earnings and propose a framework for understanding labor market success we suggest that the advantages of the children of successful parents go considerably beyond the benefits of superior education the inheritance of wealth or the genetic inheritance of cognitive ability we suggest that noncognitive personality variables such as attitudes towards risk ability to adapt to new economic conditions hard work and the rate of time preference affect both earning and the transmission of economic status across generations

real wages over the business cycle evidence from panel data one topic on which keynes did not disagree with classical economists was the cyclical behavior of real wages keynes 1936 as well as various classical writers predicted that real wages should move countercyclically quoting the general theory p 17 in general an increase in employment can only occur through the accompaniment of a decline in real wages thus i am not disputing this vital fact which the classical economists have rightly asserted as indefeasible this prediction is based on the premise of competition and a given short run capital stock increases in employment then correspond to more intensive use of capital and through diminishing product lower real wages for this reason evidence by dunlop 1938 and tarshis 1939 that real wages move procyclically was viewed as paradoxical both dunlop and tarshis based their findings on an observed positive correlation between real and money wages which given the procyclical movement of money wages implies a positive correlation between

optimal fiscal policy in a business cycle model this paper develops the quantitative implications of optimal fiscal policy in a business cycle model in a stationary equilibrium the ex ante tax rate on capital income is approximately zero there is an equivalence class of ex post capital income tax rates and bond policies that support a given allocation within this class the optimal ex post capital tax rates can range from close to independently and identically distributed to close to a random walk the tax rate on labor income fluctuates very little and inherits the persistence properties of the exogenous shocks thus there is no presumption that optimal labor tax rates follow a random walk most of the welfare gains realized by switching from a tax system like that of the united states to the ramsey system come from an initial period of high taxation on capital income

rationality of negative stock price responses to strong economic activity monthly quarterly and annual data between 1956 and 1995 were used to examine the effects of real economic variables on stock returns future corporate cash flows and future inflation in general relative effects of various economic variables on stock returns are justified by their effects on future corporate cash flows and on inflation in particular employment growth shows the strongest negative effect on stock returns compared with other variables employment growth is related more negatively with future corporate cash flows and more positively with future inflation these effects are most pronounced in annual data which reflect long term relationships based on these results negative stock price responses to strong economic activity seem to be rational

optimal fiscal policy with robust control abstract this paper analyzes how consumer uncertainty affects optimal fiscal policy in the lucas and stokey 1983 framework the consumers lacking confidence in their knowledge of the stochastic environment endogenously tilt their subjective probability model away from an approximating probability model the government though is confident that the approximating probability model characterizes the stochastic environment this confidence dichotomy reveals a range of possible objective functions for an altruistic government i assume that the government maximizes the consumers expected utility under the consumers own subjective probability model it is found that this government relies less heavily on labor taxes to absorb the fiscal shock than would be optimal if consumers were fully confident in their probability model this policy helps mitigate the direct welfare cost associated with consumer uncertainty i compare this policy to the one implemented by a government that maximizes the consumers expected utility under the approximating probability model

time varying correlations in oil gas and co2 prices an application using bekk ccc and dcc mgarch models previous literature has identified oil and gas prices as being the main drivers of co2 prices in a univariate generalized autoregressive conditional heteroscedasticity garch econometric framework alberola et al 2008 oberndorfer 2009 by contrast we argue in this article that the interrelationships between energy and emissions markets shall be modelled in a vector autoregressive var and multivariate garch mgarch framework so as to reflect the dynamics of the correlations between the oil gas and co2 variables overtime using the baba engle kraft kroner bekk constant conditional correlation ccc and dynamic conditional correlation mgarch dcc mgarch models on daily data from april 2005 to december 2008 we highlight significant own volatility cross volatility spillovers and own persistent volatility effects for nearly all markets indicating the presence of strong autoregressive conditional heteroscedasticity arch and garch effects besides we provide strong empirical evidence of tim

optimal taxation without state contingent debt in an economy studied by lucas and stokey tax rates inherit the serial correlation structure of government expenditures belying barro s earlier result that taxes should be a random walk for any stochastic process of government expenditures to recover a version of barro s random walk tax smoothing outcome we modify lucas and stokey s economy to permit only risk free debt having only risk free debt confronts the ramsey planner with additional constraints on equilibrium allocations beyond one imposed by lucas and stokey s assumption of complete markets the ramsey outcome blends features of barro s model with lucas and stokey s in our model the contemporaneous effects of exogenous government expenditures on the government deficit and taxes resemble those in lucas and stokey s model but incomplete markets put a near unit root component into government debt and taxes an outcome like barro s however we show that without ad hoc limits on the government s asset holdings outcomes can diverge in importa

political risk in emerging and developed markets using analyst estimates of political risk we show that political risk represents a more important determinant of stock returns in emerging than developed markets average returns in emerging markets experiencing decreased political risk exceed those of emerging markets experiencing increased political risk by approximately 11 per quarter in contrast the difference is only 2 5 per quarter for developed markets further the difference between the impact of political risk in emerging and developed markets is statistically significant we also document a global convergence in political risk over the last 10 years political risk has decreased in emerging markets and increased in developed markets if this trend continues the differential impact of political risk in emerging vs developed markets may narrow

survival duration of plants evidence from the us petroleum refining industry abstract this paper presents a duration analysis on the survival of us petroleum refining plants for the 1981 1986 period when the industry as a whole declines in response to the decontrol of crude oil markets the purpose is to examine the duration dependence and determinants of post deregulation plant lifetimes the weibull model with the correction for unobserved individual heterogeneity provides a better fit to the data empirical results show that plant size age regulatory subsidies technology use and multiplant coordination are key determinants of refinery life duration after deregulation in addition major integrated oil companies tend to make timely restructuring via refinery closures and sales the interactive effects of size and technology use and of multiplant coordination and integrated organization are also important to the refinery survival

unemployment dynamics in britain we examine the inter related dynamics of the unemployment flows and stock our model allows them to be linked through the standard accounting identity but also through behavioural relationships we find that for the uk the bulk of the correlation between duration and the unemployment stock arises from the dependence of duration on unemployment taking careful account of the inter temporal identity outflow shocks have contributed little to the evolution of unemployment since the late 1960s given that the correlation of duration and unemployment arises from the behavioural relationship we show that unemployment dynamics arise mostly from shocks to the inflow unemployment remains one of europe s more pressing economic and social problems as highlighted in the eu s lisbon declaration of 2000 a dynamic approach to unemployment starts from the recognition that unemployment is a stock and changes through shocks to the outflow and inflow the research and policy focus has generally been on the outflow process or equivalently unemployment duration a glance at figure 1 shows why this might be so it reveals a very strong co movement of the unemployment rate and the proportion of the unemployed out of work for a year or more analysts have used data like this to argue that the source of unemployment fluctuations has been changes in the outflow process 1 possibly as a consequence of this most policies directed at reducing unemployment focus on improving the search effectiveness and employability of the currently unemployed the unemployment flows and stock are related in quite complex ways and in this paper we focus on these inter related dynamics the model we use allows them to be linked in two ways first there is the simple accounting relationship whereby shocks to the flows accumulate in the stock second search and matching models suggest behavioural relationships of the flows depending on unemployment the presence of the nonlinear accounting identity in the model makes the analysis of the joint system problematic so we proceed sequentially investigating first one link and then the other we find that for the uk the bulk of the correlation between duration and the unemployment stock displayed in figure 1 arises from the dependence of the former on the latter we find a strong dependence of the outflow rate on unemployment taking careful account of the inter temporal identity on the other hand outflow shocks have contributed little to the evolution of unem

scar effects of unemployment an assessment of institutional complementarities this article uses panel data from the survey of income and program participation sipp and the european community household panel echp for a comparative analysis of workers post unemployment earnings trajectories in the united states and 12 western european countries across the study sample of industrialized countries results of difference in difference propensity score matching show post unemployment earnings losses to be largely permanent and particularly significant for high wage and older workers as well as for women the analyses also show that negative effects of unemployment on workers subsequent earnings are mitigated through either generous unemployment benefit systems or strict labor market regulation these effects stem partly from favorable behavioral responses that prevent downward occupational and industrial mobility and partly from changes in the overall structure of labor markets favoring the transferability of worker skills between jobs these positive effects materialize despite t

the industrial mobility of displaced workers this article uses a two industry model of unemployment duration and job search to estimate rates of transition of displaced workers from unemployment to employment distinguishing between employment in a worker s previous industry and in other industries the competing risks model allows inferences about search strategies to be drawn from data concerning employment outcomes and allows tests of some fundamental implications of search theory there is evidence that improvements in the prospects for employment in their previous industry induce displaced workers to reduce search intensity or increase reservation wages in other industries

risk of labor displacement and cross industry labor mobility a well supported conclusion of previous research is that displacement entails large and persistent costs for workers it therefore seems reasonable to expect workers to try to anticipate and respond to the risk of displacement using 1983 93 data from the panel survey of income dynamics and the displaced workers supplement to the current population survey the author investigates whether industry specific measures of job loss risk are correlated with workers propensity to cross industry lines for new jobs she finds that a one standard deviation increase in the risk of job loss an 86 increase from the mean level increased the probability of inter sectoral mobility by 10 5 in a sample of white men three factors that appreciably increased the likelihood of inter sectoral mobility in response to job insecurity were voluntary separation from the previous job high educational attainment and being currently employed as opposed to temporarily laid off

optimal fiscal and monetary policy in an economy without capital abstract this paper is concerned with the structure and time consistency of optimal fiscal and monetary policy in an economy without capital in a dynamic context optimal taxation means distributing tax distortions over time in a welfare maximizing way for a barter economy our main finding is that with debt commitments of sufficiently rich maturity structure an optimal policy if one exists is time consistent in a monetary economy the idea of optimal taxation must be broadened to include an inflation tax and we find that time consistency does not carry over an optimal inflation tax requires commitment by rules in a sense that has no counterpart in the dynamic theory of ordinary excise taxes the reason time consistency fails in a monetary economy is that nominal assets should from a welfare maximizing point of view always be taxed away via an immediate inflation in a kind of capital levy this emerges as a new possibility when money is introduced into an economy without capital

what will take the con out of econometrics the paper begins with the question of whether leamer s extreme bounds analysis eba really does take the con out of econometrics by analytically demonstrating that the extreme bounds are simply functions of the f statistic for the deletion of variables from a regression we conclude that the information provided by eba represents no advance over that available from traditional methods furthermore there is a degree of arbitrariness in eba which exactly parallels the selective reporting of regressions it was designed to supplant the last part of the paper attempts a positive response to its title by following a well defined series of modelling steps we maintain that cooley and le roy s eba derived conclusions concerning the interest elasticity of money demand owe more to a faulty methodology than to the data this abstract was borrowed from another version of this item

a global stock and bond model six fundamental risk factors four for stocks and two for bonds explain most of the common volatility of individual stocks and bonds worldwide some of the risk factors have a strong international component and others are more purely national the cross national component of the risk factors tends to be stronger within the european union than worldwide the model proposed in this article can be used for integration of worldwide asset selection and asset allocation decisions

macroeconomic variables and corporate performance increased economic and financial integration and substantial macroeconomic fluctuations require that corporate managers and investment analysts pay more attention than in the past to the link between the noise that these fluctuations represent and the company s performance past and future for many reasons company managers must weed out the effects of the noise to obtain a clear picture of the company s intrinsic competitiveness and long term sustainable profits the question is to what extent can outside shareholders and investment analysts adopt this approach to corporate performance current reporting practice does not provide these outsiders with an adequate idea of the character and magnitude of the impact of macroeconomic variables on the company the recommendations of international accounting standard 1 presentation of financial statements as revised in 1997 however offer an improvement in this important area this article presents four levels of implementation of ias 1 and what these lev

robustly optimal monetary policy with near rational expectations the paper considers optimal monetary stabilization policy in a forward look ing model when the central bank recognizes that private sector expectations need not be precisely model consistent and wishes to choose a policy that will be as good as possible in the case of any beliefs that are close enough to model consistency it is found that commitment continues to be important for optimal policy that the optimal long run inflation target is unaffected by the degree of potential distortion of beliefs and that optimal policy is even more history dependent than if rational expectations are assumed jel c62 d84 el 3 e31 e32 e52 an extensive literature has considered the optimal conduct of monetary policy under the assumption of rational or model consistent expectations this literature has found that it is quite important to take account of the effects of the systematic and hence predictable compo nent of monetary policy on expectations for example it is found quite generally that an optimal policy commitment differs from the policy that would be chosen through a sequential optimiza tion procedure with no advance commitment of future policy it is also found quite generally that optimal policy is history dependent a function of past conditions that no longer affect the degree to which it would be possible to achieve stabilization aims from the present time onward 1 both of these conclusions depend critically however on the idea that an advance commitment of future policy should change people s expectations at earlier dates this may lead to the fear that analyses that assume rational expectations re exaggerate the degree to which a policy authority can rely upon private sector expectations to be shaped by its policy commitments in precisely the way that it expects them to be what if the relation between what a central bank plans to do and what the public will expect to happen is not quite so predictable might both the case for advance commitment of policy and the case for history dependent policy be considerably weakened under a more skeptical view of the precision with which the public s expectations can be predicted one way of relaxing the assumption of rational expectations is to model agents as forecasting using an econometric model the coefficients of which they must estimate using data observed prior to some date sampling error will then result in forecasts that depart somewhat from pre cise consistency with the analyst s model 2 however selecting a monetary policy rule on the basis of its performance under a specific model of learning runs the risk of exaggerating the degree to which the policy analyst can predict and hence exploit the forecasting errors that result from a particular way of extrapolating from past observations one might even conclude

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

where to go workers reasons to quit and intra vs interindustry job mobility we show that workers reasons for quitting their job affect their decision to stay in or leave their industry using survey data among public sector employees in the netherlands workers quitting for e g pay work pressure or job duties move relatively often to another industry in contrast to workers quitting for commuting time or the atmosphere at work this suggests that workers use their experience in the initial job to update their expectations on other jobs in the industry as the first set of job aspects is more likely to be related among jobs within an industry than the latter furthermore it is shown that workers reasons to quit fully explain the differences in wage growth between intra and interindustry job movers lastly we find that workers who quit for pay or management often leave the public sector altogether the data used in this article are proprietary

convergence to market efficiency of top gainers abstract this study investigates the convergence process toward efficiency of daily top gainers the convergence process toward efficiency is much clearer as a result of using a garch 1 1 model compared to the ols model and exhibits a monotonic decline as the time interval increases the relationship between volatility and order imbalances is however not strong enough suggesting that market makers do have the capability to reduce price volatility this study develops an imbalance based trading strategy which earns a positive profit but fails to outperform the buy and hold strategy i e open to close returns a nested causality approach which examines the dynamic return order imbalance relationship during the price formation process confirms the results

persistence of employment fluctuations a model of recurring job loss standard models of employment fluctuations cannot reconcile the unemployment rate s remarkable persistence with the high job finding rates found in worker flows data a matching model emphasizing high hazard rates among newly formed firm worker matches can resolve this shortcoming in the model matches are experience goods consequently newly employed workers face higher hazard rates following a job loss workers may experience several short lived jobs before finding stable employment at an aggregate level an initial burst of job loss precipitates a steady flow of recurring job loss a simulation shows that this recurring job loss can account for the fact that the unemployment rate remains elevated for as much as 4 or 5 years following an initial jump intuitively the labour market frictions associated with the difficult and time consuming process of matching unemployed workers with appropriate jobs represent an appealing way to enhance conventional dynamic general equilibrium models of economic fluctuations that generally exhibit very little internal propagation of business cycle shocks 1 nevertheless although conventional matching models such as the canonical mortensen and pissarides 1994 model successfully explain many other important features of the labour market they fail to explain the high degree of persistence observed in the u s unemployment rate the primary reason for this failure is that data on labour market flows show that unemployed workers actually find jobs quite quickly therefore following a shock that triggers a burst of job loss the high job finding rate implies that the unemployment rate in these models returns quite rapidly back toward its average level this represents a significant obstacle to the notion that frictions in the labour market account for much of the propagation of business cycle shocks this paper asserts that existing matching models fail to capture an important feature of the labour market that can reconcile the dramatic persistence of the unemployment rate with the evidence of high job finding rates specifically although unemployed workers find jobs quickly the newly found jobs often last only a short time after an initial job loss a worker may experience several short lived jobs before settling into more stable employment this recurring job loss slows the pace at which the unemployment rate returns to its normal level following an adverse shock

heterogeneous job matches and the cyclical behavior of labor turnover abstract worker flows to and from unemployment simultaneously occur over the us business cycle and the size of the flows is positively linked to the unemployment rate unemployment flows and the unemployment rate are highly volatile persistent and countercyclical inflows lead the unemployment rate and the unemployment rate leads outflows over the business cycle the one sector stochastic growth model is augmented by matching frictions in the labor market and match specific productivity shocks that introduce ex post heterogeneous job matches matching frictions help generate the lead lag relationship between unemployment flows and the unemployment rate combined with heterogeneous job matches they generate endogenous unemployment flows and an unemployment rate whose dynamic characteristics match observed data

excess worker reallocation workers face a trade off between macroeconomic and individual incentives to work in different occupations industries namely between search frictions and personal comparative advantages workers endowed with heterogeneous multi dimensional skills search for jobs that require different skill combinations in equilibrium specialized individuals contact few selected types of vacancies where they are likely to be hired those with weak comparative advantages are seldom chosen among competing applicants thus seek any job type in a tight labour market comparative advantages dominate waiting costs offsetting labour mobility across industries occupations excess worker reallocation is lower and matches are more successful consistently with direct and indirect evidence

on the robustness of laissez faire abstract this paper considers a model economy in which agents are privately informed about their type their endowments of various goods and their preferences over these goods while preference orderings over observable choices are allowed to be correlated with an agent s private type we assume that the planner government is both uncertain about the nature of this joint distribution and unable to choose among multiple equilibria of any given social mechanism we model the planner government as having a maxmin objective in the face of this uncertainty our main theorem is as follows once we allow for this kind of uncertainty and assume no wealth effects in preferences the uniquely optimal social contract is laissez faire in which agents trade in unfettered markets with no government intervention of any kind

the influence of traded and nontraded wages on relative prices and real exchange rates abstract this work demonstrates for fourteen oecd economies that wage differentials between traded and nontraded goods significantly affect the relative price of nontradeables and the real exchange rate in the short and medium run 1997 elsevier science s a

business cycles and labor market search the quantitative implications of labor market search for economic fluctuations are evaluated in the context of a real business cycle model incorporating labor market search into the model is found to improve its empirical performance along several dimensions in particular hours now fluctuate substantially more than wages and the contemporaneous correlation between hours and productivity falls in addition the model replicates the observation that output growth displays positive autocorrelation at short horizons overall the empirical results suggest that the labor market search environment embodies a quantitatively important propagation mechanism copyright 1996 by american economic association

how robustness can lower the cost of discretion model uncertainty has the potential to change importantly how monetary policy is conducted making it an issue that central banks cannot ignore using a standard new keynesian business cycle model this paper analyzes the behavior of a central bank that conducts policy under discretion while fearing that its model is misspecified the main results are as follows first policy performance can be improved if the discretionary central bank implements a robust policy this important result is obtained because the central bank s desire for robustness directs it to assertively stabilize inflation thereby mitigating the stabilization bias associated with discretionary policymaking second the central bank s fear of model misspecification leads it to forecast future outcomes under the belief that inflation in particular will be persistent and have large unconditional variance raising the probability of extreme outcomes private agents however anticipating the policy response make decisions under the belief that inflation will be more closely stabilized that is more tightly distributed than under rational expectations finally as a technical contribution the paper shows how to solve with robustness an important class of linear quadratic decision problems

model uncertainty and intertemporal tax smoothing in this paper we examine how model uncertainty due to the preference for robustness rb aects optimal taxation and the evolution of debt in the barro tax smoothing model 1979 we rst study how the government spending shocks are absorbed in the short run by varying taxes or through debt under rb furthermore we show that introducing rb improves the model s predictions by generating i the observed relative volatility of the changes in tax rates to government spending ii the observed comovement between government decits and spending and iii more consistent behavior of government budget decits in the us economy finally we show that rb can also improve the model s predictions in the presence of multiple shocks

declining us output volatility and its effect on labour flow volatility an mgarch analysis this article analyses flow rates of us workers between employment and unemployment using new quarterly data for the period 1967 to 2002 multivariate garch models are used to investigate links between flow rate volatilities the results suggest that links changed substantially in the mid 1980s coinciding with the documented decline in output volatility these changes in adjustment dynamics are consistent with a move to greater use of hours rather than worker adjustment

inter and intrasectoral shocks effects on the unemployment rate intersectoral shocks require resource reallocation across sectors while intrasectoral shocks require resource reallocation within sectors a crucial difference between these shocks is that the former require much higher adjustment costs than the latter using accounting data to calculate returns on capital in manufacturing industries i generate proxies for these shocks i find that the magnitude of intrasectoral shocks is much greater than that of intersectoral shocks but intersectoral shocks explain the aggregate unemployment rate better than intrasectoral shocks i also find that intersectoral shocks are more closely related to the unemployment rate in the later part of the sample considered

seniority sectoral decline and employee retention an analysis of layoff unemployment spells we investigate the effect of tenure on employee retention under varying labor market conditions using a competing risks analysis of recall and new job acceptance applied to layoff unemployment spell data from waves 15 and 16 1982 83 of the panel study of income dynamics we find that adverse conditions sectoral employment decline significantly reduce the positive tenure effect on recall probabilities this result is consistent with firm default on delayed payment contracts and does not appear to reflect the effect of technological change on the value of firm specific investments

optimal taxation with private government information the ramsey model of fiscal policy implies that taxes should be smooth in the sense of having small variances in contrast empirical labour tax processes are smooth in the sense of being random walks they provide prima facie evidence for incomplete government insurance this paper considers whether private government information might lie behind such incomplete insurance it shows that optimal incentive compatible policies exhibit limited use of state contingent debt and greater persistence in taxes and debt and it argues that they are better approximations to empirical fiscal policies than those implied by the ramsey model the paper also establishes that optimal incentive compatible allocations converge to allocations such that the government s incentive compatibility constraint no longer binds generally these limiting allocations are ones in which the government is maximally indebted their credibility and the interaction of incentive compatibility and credibility is briefly discussed

the role of selective job search in uk unemployment selective search where unemployed job losers confine their job seeking efforts to matches in the pre separation sector has attracted consid erable attention as a possible source of high and persistent unemployment however this idea is questionable those opting for selection may do so because this strategy is more effective at gener ating an acceptable offer using uk microdata i find evidence in support of the latter view selective searchers cannot account for the persistence of high unemployment since the early 1980s

the role of nontraded and traded wages in the productivity differential model purchasing power parity ppp remains the benchmark model for long run nominal exchange rate determination since cassel s pioneering work 3 despite weak empirical support 6 7 12 14 seminal work by balassa 1 and samuelson 15 explains that movements in real exchange rates are due to changing real factors in the economy balassa and samuelson show that differing productivity rates between traded and nontraded sectors can explain deviations in ppp hsieh 10 has empirically supported the importance of productivity differentials in explaining real exchange rate movements although the balassa samuelson productivity differential model is commonly cited by international textbooks as an explanation of ppp failure 4 11 several assumptions have not been explicitly tested this paper examines four critical assumptions of the balassa model for fourteen oecd economies and demonstrates that some are weak and deserve additional study real exchange rate movements affect the competitiveness of a nation s tradable goods sector and represent deviations from purchasing power parity seminal work by balassa on real exchange rates and ppp violations relies on several underlying premises 1 the traded sector possesses higher productivity growth and larger intercountry differences than the nontraded sector 2 intracountry wage rates are equalized between traded and nontraded sectors due to labor mobility 3 wages in the traded good sector are linked to productivity in that sector 4 innovations in unit labor cost wage compensation adjusted for productivity cause corresponding movements in the relative price of nontraded goods this paper examines general patterns and interrelationships among traded and nontraded productivity real wages and relative prices for 14 oecd economies and extends the work of strauss and ferris 16 we construct gdp price indices productivity measures and real wage compensation rates for the traded and nontraded sectors for the years 1970 1990 the key finding is that differences in intersectoral wage growth appear to influence the relative price of nontradables more than differences in productivity growth the results support the proposition that produc

estimates of the variance of u s inflation based upon the arch model it is generally agreed that the unpredictability of future inflation is a major component of the welfare loss associated with inflation perfectly predicted inflation might induce some costs through institutional rigidities governmental interference and transaction costs but in the long run these should be rather minimal as these institutions adopt various forms of indexing when inflation is unpredictable risk averse economic agents will incur a loss even if prices and quantities are perfectly flexible in all markets inflation is a measure of the relative price of goods today and goods tomorrow thus uncertainty in tomorrow s price impairs the efficiency of today s allocation decisions friedman in his nobel lecture 8 argues convincingly that higher variability of inflation would lead to decreased output ceteris paribus he then conjectures that higher rates of inflation are generally associated with higher variability of inflation and presumably greater uncertainty about future rates if this is true then higher rates of inflation would also be associated with low levels of output which implies a positively sloped phillips curve this paper uses a new statistical technique arch to estimate the conditional mean and variance of inflation from u s time series data the main finding is that the variance of inflation in the seventies was only slightly greater than in the sixties

robust monetary policy with imperfect knowledge we examine the performance and robustness properties of monetary policy rules in an estimated macroeconomic model in which the economy undergoes structural change and where private agents and the central bank possess imperfect knowledge about the true structure of the economy private agents rely on an adaptive learning technology to form expectations and update their beliefs based on incoming data policymakers follow an interest rate rule aiming to maintain price stability and to minimize uctuations of unemployment around its natural rate but are uncertain about the economy s natural rates of interest and unemployment we show that in this environment the scope for economic stabilization is signiflcantly reduced relative to an economy under rational expectations with perfect knowledge furthermore policies that would be optimal under perfect knowledge can perform very poorly when knowledge is imperfect e cient policies that take account of private learning and misperceptions of natural rates call for more aggressive responses to in ation that would be optimal under perfect knowledge we show that such policies not only improve performance in our baseline model but are also quite robust to potential misspeciflcation of private sector learning and the magnitude of variation in natural rates

sectoral shocks and movement costs effects on employment and welfare abstract in this paper we provide a general equilibrium model of a two sector economy which accounts for low employment due to the incomplete responses of workers to sectoral shocks this model is used to reconcile the seemingly contradictory results of macro and micro evidence namely that sectoral shocks explain fluctuations of employment even though we do not observe cyclical movements of labor across sectors we further find that increasing the frequency of sectoral shocks holding the magnitude of the shocks fixed decreases total employment this allows us to account for the phenomena that the unemployment rate itself has been higher since 1970 a period characterized by an increased frequency of sectoral shocks we also study the theoretical implications of two opposite policies one which subsidizes mobility and the other which eliminates the partial insurance provided in the model the former increases employment and welfare while the latter increases employment but reduces welfare

identification and estimation of money demand in most natural sciences physics chemistry biology theories are validated by controlled experiment however in other natural sciences astronomy meteorology and in most social sciences including economics the data are characteristically generated not by experiment but by measurement of uncontrolled systems in economics theories take the form of restrictions on the models assumed to generate the data and statistical methods replace experimental controls in testing these restrictions and here is the difficulty in economics particularly macroeconomics the theory used to derive tests ordinarily does not generate a complete specification of which variables are to be held constant when statistical tests are performed on the relation between the dependent variable and the independent variables of primary interest accordingly in such cases there will be a set of often very different candidate regression based tests each of which has equal status with the others since each is based on a different projection of the same underlying multivariate model except in the unlikely event that the explanatory variables are mutually orthogonal the conditional regression coefficients which generally form the basis for the test statistic will depend on the conditioning set we conclude from this that if a theory which does not generate a complete specification of the regression test is nonetheless to have testable implications these implications must be robust over the permissible alternative specifications if the restrictions indicated by the theory are satisfied in some projections but not in others that have an equal claim to represent implications of the theory one cannot conclude that the theory has been confirmed the fact that the observable implications of valid theories must obtain over a broad but usually incompletely specified set of regressions rather than for a single regression introduces a large and unavoidable element of imprecision into hypothesis testing in macroeconomics generally it appears to be appropriate to weaken the statistical criterion for rejecting theories consider for example the theory of money demand which will engage our attention in this paper the tobin baumol square root formula implies that the elasticity of money demand with respect to the interest rate is exactly one half but which interest rate should wealth be held constant inflation in view of such uncertainties it would be inappropriate to insist in a literal minded fashion on rejecting the tobin baumol model if in some regression the measured interest elasticity differed from one half by more than two standard deviations and only then obviously a more flexible approach is called for the practice has been to conclude that the statistical evidence is consistent with the tobin baumol model as long as the interest rate coefficient is negative if it is negative and significant or negative and insignificantly different from minus one half that would provide somewhat stronger confirmation but a positive coefficient particularly a significantly positive coefficient would be viewed as raising questions about the validity of the theory in macroeconomics generally as in the money demand application the typical response to specification uncertainty has been to regard a theory as supported if the signs of the estimated coefficients agree with those expected from theory and as disconfirmed otherwise there is no theoretical justification for this procedure but it seems to be a reasonable course to follow the point that economic theory ordinarily generates incompletely specified statistical university of california santa barbara we have received helpful comments from andrew abel robert clower michael darby robert engle stephen goldfeld david laidler edward leamer robert lucas frederic mishkin and edward prescott thomas hall provided able research assistance

stock prices asset portfolios and macroeconomic variables in ten european countries abstract this paper investigates the relationship between stock indices asset portfolios and macroeconomic variables in ten european countries it is shown that employment imports inflation and interest rates are inversely related to stock prices expectations about future real activity measures for money and the u s yield curve are positively related to stock prices a portfolio of european stock indices was constructed and it is shown that this portfolio is the variable that most strongly explains the variation in the stock prices the associations between stock prices and macroeconomic variables are shown to be strongest in germany the netherlands switzerland and the united kingdom there is a high degree of similarity between the effects in the first three of these countries in several instances the stock prices are related to historic value of economic variables indicating that predictive models can be constructed

are workers permanently scarred by job displacements this paper investigates whether workers suffer lasting scars following job displacements using david t ellwood s 1982 terminology scars represent persistent effects whereas blemishes are transitory adjustments which dissipate over time more precisely dislocated individuals are defined as scarred if they continue to earn less or to be unemployed more than their nondisplaced counterparts even after the conclusion of a several year adjustment period