growth and unemployment this paper analyses the effects of growth on long run unemployment using a search model of equilibrium unemployment where growth arises explicitly from the introduction of new technologies that require labour reallocation for their implementation the analysis uncovers and compares between two competing effects of growth on unemployment the first is a capitalisation effect whereby an increase in growth raises the capitalised returns from creating jobs and consequently reduces the equilibrium rate of unemployment the second is a creative destruction effect whereby an increase in growth reduces the duration of a job match thereby raising the equilibrium level of unemployment both directly by raising the job separation rate and indirectly by discouraging the creation of job vacancies this paper asks the question of how the rate of economic growth affects unemployment in the long run the main consideration that leads us to think that this is an interesting question has to do with the re allocative aspect of growth in the long run faster economic growth must come from a faster increase in knowledge to the extent that the advancement of knowledge is embodied in industrial innovations it is likely to raise the job destruction rate through automation skill obsolescence and the bankruptcy associated with the process of creative destruction in short increased growth is likely to produce an increased rate of job turnover and the search theories of lucas and prescott 1974 and pissarides 1990 imply that an increased rate of job turnover will result in a higher natural rate of unemployment this conclusion is also consistent with the empirical results of davis and haltiwanger 1990 which show that periods of high unemployment tend to be periods of high job turnover at the establishment level it suggests the possibility of a positive longrun tradeoff between growth and unemployment at least over some range there has been relatively little attention paid to our question in the literature on longrun determinants of unemployment for example the recent empirical examination by layard nickell and jackman 1991 of unemployment rates among oecd countries did not even consider the rate of economic growth as a possible explanatory variable this is consistent with the seminal theoretical work of phelps 1968 which implies that the natural rate of unemployment is independent of the rate of productivity growth the only

calculating and using second order accurate solutions of discrete time dynamic equilibrium models we describe an algorithm for calculating second order approximations to the solutions to nonlinear stochastic rational expectations models the paper also explains methods for using such an approximate solution to generate forecasts simulated time paths for the model and evaluations of expected welfare differences across different versions of a model the paper gives conditions for local validity of the approximation that allow for disturbance distributions with unbounded support and allow for non stationarity of the solution process

monetary policy and uncertainty in an empirical small open economy model this paper explores optimal policy design in an estimated model of three small open economies australia canada and new zealand within a class of generalized taylor rules we show that to stabilize a weighted objective of output consumer price in ation and nominal interest variation optimal policy does not respond to the nominal exchange this is despite the presence of local currency pricing and due in large part to observed exchange rate disconnect in these economies optimal policies that account for the uncertainty of model estimates as captured by the parameters posterior distrbution similarly exhibit a lack of exchange rate response in contrast to brainard 1967 the presence of parameter uncertainty can lead to more or less aggressive policy responses depending on the model at hand

the ins and outs of european unemployment in this paper we study the contribution of inflows and outflows to the dynamics of unemployment in three european countries the united kingdom france and spain all countries are interesting in their own right and in the comparison with each other britain s labour markets were strictly regulated up to the mid 1980s but they have been liberalized since then france is still a regulated economy compared with britain with unemployment averaging about 8 spain has had the biggest rise in unemployment in europe reaching 24 in the mid 1990s but policy reforms and fast growth since then brought it down to a level below france s we compare performance in these three countries making use of both administrative and labor force survey data we find that the impact of the 1980s reforms in britain is evident in the contributions of the inflow and outflow rates the inflow rate became a bigger contributor after the mid 1980s although its significance subsided again in the late 1990s and 2000s in france the dynamics of unemployment are driven by the outflow rate virtually entirely which is consistent with a regime with strict employment protection legislation in spain however both rates contribute significantly to the dynamics perhaps as a consequence of the prominence of fixed term contracts since the late 1980s

new evidence on the puzzles results from agnostic identification on monetary policy and exchange rates abstract past empirical research on monetary policy in open economies has found evidence of the delayed overshooting puzzle and the forward discount puzzle we revisit the effects of monetary policy on exchange rates by applying uhlig s uhlig h 2005a what are the effects of monetary policy on output results from an agnostic identification procedure journal of monetary economics 52 2 381 419 identification procedure that involves sign restrictions on the impulse responses of selected variables in a first step we leave the response of the exchange rate agnostically open and find sizeable evidence for both puzzles in a second step we additionally rule out the delayed overshooting by construction our results indicate that the forward discount puzzle is robust even without delayed overshooting

uncertainty matters evidence from close elections abstract this paper uses a data rich environment to produce direct econometric estimates of macroeconomic and financial uncertainty for 11 advanced nations these indices exhibit significant independent variation from popular proxies and provide a refinement of the influential work of jurado et al 2015 that results in improved real time performance we use this new data in combination with narrative evidence to jointly identify macro uncertainty and financial shocks macro uncertainty shocks are identified with close elections and financial shocks with financial stress during financial crises we find that macro uncertainty shocks matter for the majority of countries and that the real effects of macro uncertainty shocks are generally larger conditioning on close elections these results are robust to controlling for news shocks and global uncertainty as well as a variety of shocks considered to be important drivers of the business cycle

the macroeconomic impact of oil earnings uncertainty new evidence from analyst forecasts we develop measures of oil earnings uncertainty oeu using analyst forecasts drawn from a large firm level dataset oeu is related to future economic downturns so some oeu measures may serve to forecast future downturns an increase in oeu also has adverse effects on the us oil sector the results are robust to conditioning on aggregate uncertainty at the same time oeu is related to increases in stock prices unlike aggregate uncertainty which has the opposite effect oeu is thus an independent influence on both the oil industry and on economic aggregates

monetary policy and exchange rate volatility in a small open economy we lay out a small open economy version of the calvo sticky price model and show how the equilibrium dynamics can be reduced to a simple representation in domestic inflation and the output gap we use the resulting framework to analyse the macroeconomic implications of three alternative rulebased policy regimes for the small open economy domestic inflation and cpi based taylor rules and an exchange rate peg we show that a key difference among these regimes lies in the relative amount of exchange rate volatility that they entail we also discuss a special case for which domestic inflation targeting constitutes the optimal policy and where a simple second order approximation to the utility of the representative consumer can be derived and used to evaluate the welfare losses associated with the suboptimal rules

dynamic effects of monetary policy shocks on macroeconomic volatility we use a simple new keynesian model with firm specific capital non zero steady state inflation long run risks and epstein zin preferences to study the volatility implications of a monetary policy shock an unexpected increase in the policy rate by 150 basis points causes output and inflation volatility to rise around 10 above their steady state standard deviations var based empirical results support the model implications that contractionary shocks increase volatility the volatility effects of the shock are driven by agents concern about the in ability of the monetary authority to reverse deviations from the policy rule and the results are re enforced by the presence of non zero trend inflation

determinants of long run unemployment this paper investigates the determinants of long run unemployment and growth by extending the endogenous growth model of howitt and aghion 1998 to allow for a more general treatment of the labor market in the spirit of pissarides 1990 we find that i both long run growth and unemployment depend not only on factors that affect long run growth as identified in endogenous growth models with full employment but also on certain labor market parameters ii long run unemployment may rise or fall with growth depending on the model s parameters and iii though government policies that promote growth indirectly through improvement in labor market efficiency always reduce the long run unemployment rate policies that directly encourage investment in research and development may increase the unemployment rate

differential difference equations in economics on the numerical solution of vintage capital growth models we examine techniques for the analytical and numerical solution of state dependent differential difference equations such equations occur in the continuous time modelling of vintage capital growth models which form an important class of models in modern economic growth theory the theoretical treatment of non state dependent differential difference equations in economics was discussed by benhabib and rustichini 1991 in general though the state dependence of a model prevents its analytical solution in all but the simplest of cases we review a numerical method for solving state dependent models using simple examples to illustrate our discussion in addition we apply this numerical method to the solow vintage capital growth model

the cyclicality of separation and job finding rates this paper uses cps gross flow data to analyze the business cycle dynamics of separation and job finding rates and to quantify their contributions to overall unemployment variability cyclical changes in the separation rate are negatively correlated with changes in productivity and move contemporaneously with them while the job finding rate is positively correlated with and tends to lag productivity contemporaneous fluctuations in the separation rate explain between 40 and 50 percent of fluctuations in unemployment depending on how the data are detrended this figure becomes larger when dynamic interactions between the separation and job finding rates are considered

technology shocks and job flows we consider a version of the solow growth model where technological progress can be investment specific or investment neutral the labour market is subject to search frictions and the existing productive units may fail to adopt the most recent technological advances technological progress can lead to the destruction of technologically obsolete jobs and cause unemployment we calibrate the model to replicate the high persistence that characterizes the dynamics of firms neutral technology and the frequency of firms capital adjustment we find that neutral technological advances increase job destruction and job reallocation and reduce aggregate employment investment specific technological advances reduce job destruction have mild effects on job creation and are expansionary hence neutral technological progress prompts schumpeterian creative destruction while investment specific technological progress operates essentially as in the standard neoclassical growth model using structural var models we provide support to the key dynamic implications of the model copyright 2007 wiley blackwell

the dynamics of technological unemployment this article compares the short and long run effects of technological progress on employment it presents a simple model of frictional unemployment capturing the negative creative destruction effects of technological change on employment in the long run faster technological change accelerates job obsolescence which reduces the equilibrium level of employment but it is also shown to have short run positive and potentially important effects on employment this tends to partially reconcile the schumpeterian view of the effects of technological change on labor markets with facts such as the response of most oecd unemployment rates to the 1970s productivity slowdown

on the job search and the wage distribution the article structually estimates an on the job search model of job separations given each employer pays observably equivalent workers the same but wages are dispersed across employers an employer s separation flow is the sum of an exogenous outflow unrelated to the wage and a job to job flow that decreases with the employer s wage using data from the danish integrated database for labour market research the empirical results imply as predicted by theory that search effort declines with the wage furthermore the estimates explain the employment effect defined as the horizontal difference between the distribution of wages earned and the wage offer distribution

frictional wage dispersion in search models a quantitative assessment we propose a new measure of frictional wage dispersion the mean min wage ratio for a large class of search models we show that this measure is independent of the wage offer distribution but depends on statistics of labor market turnover and on preferences under plausible preference parameterizations observed magnitudes for worker flows imply that in the basic search model and in most of its extensions frictional wage dispersion is very small notable exceptions are some of the most recent models of on the job search our new measure allows us to rationalize the diverse empirical findings in the large literature estimating structural search models

transitional dynamics of the search model with endogenous growth abstract this paper studies the steady state and dynamics of the standard matching model allowing for endogenous capital accumulation and endogenous growth the existence and uniqueness of a balanced growth path is shown along which the relationship between unemployment and growth may not be considered clear cut the model also exhibits interesting dynamic features and suggests some kind of asymmetry in the adjustment of employment over the cycle a collection of numerical experiments finally shows that a linear approximation of the model may yield a dynamic scheme that is reasonably close to the one obtained with the nonlinear model and that this feature is very robust to changes in particular assumptions made on the specification of various functions

technology policy interaction in frictional labour markets does capital embodied technological change play an important role in shaping labour market outcomes to address this question we develop a model with vintage capital and search matching frictions where irreversible investment in new vintages of capital creates heterogeneity in productivity among firms matched as well as vacant we demonstrate that capital embodied technological change reduces labour demand and raises equilibrium unemployment and unemployment durations in addition the presence of labour market regulations unemployment benefits payroll taxes and firing costs exacerbates these effects thus the model is qualitatively consistent with some key features of the european labour market experience relative to that of the u s it features a sharper rise in unemployment and a sharper fall in the vacancy rate and the labour share a calibrated version of our model suggests that this technology policy interaction could explain a sizeable fraction of the observed differences between the u s and europe copyright 2007 wiley blackwell

measuring inflation expectations uncertainty using high frequency data inflation expectations play a key role in determining future economic outcomes the associated uncertainty provides a direct gauge of how well anchored the inflation expectations are we construct a model based measure of inflation expectations uncertainty by augmenting a standard unobserved components model of inflation with information from noisy and possibly biased measures of inflation expectations obtained from financial markets this new model based measure of inflation expectations uncertainty is more accurately estimated and can provide valuable information for policymakers using u s data we find significant changes in inflation expectations uncertainty during the great recession

the international transmission of volatility shocks an empirical analysis this paper proposes an empirical model which can be used to estimate the international transmission of volatility shocks using this model we estimate that a one standard deviation increase in the volatility of the shock to us real gdp leads to a decline in uk gdp of 1 relative to trend and a 0 7 increase in uk cpi relative to trend at the two year horizon using a nonlinear open economy dsge model we find that these empirical estimates are consistent with the response to a perturbation to the volatility of foreign supply type shocks while an increase in the volatility of demand shocks has a negligible impact

the international effects of global financial uncertainty shocks abstract in this paper we study the impact of sudden rises in global financial uncertainty on small open economies to this end we extract a global factor from the realised volatilities of about 1000 risky asset returns from around the world we then analyse how shocks to this factor affect economic activity in 44 advanced and emerging small open economies by estimating local projections in a panel regression framework we find that shocks increasing global financial uncertainty have adverse consequences on output trade and unemployment while their impact on nominal variables is more heterogeneous across countries furthermore the effects are more severe in countries with a higher degree of trade or financial openness higher levels of vulnerabilities weaker institutions or during economic downturns

sticky prices fair wages and the co movements of unemployment and labor productivity growth abstract this paper studies the co movements of unemployment and labor productivity growth for the u s economy measures of co movements in the frequency domain indicate that co movements between variables differ strongly according to the frequency first long term and business cycle co movements are larger than short term co movements second co movements are negative in the short and long run but positive over the business cycle a new keynesian model that combines nominal rigidity on the goods market sticky prices and real rigidity on the labor market fair wages is shown to be quantitatively consistent with the observed co movements both in the long term and over the business cycle however the model fails to explain the short term co movements

the role of shocks and institutions in the rise of european unemployment the aggregate evidence two key facts about european unemployment must be explained the rise in unemployment since the 1960s and the heterogeneity of individual country experiences while adverse shocks can potentially explain much of the rise in unemployment there is insufficient heterogeneity in these shocks to explain cross country differences alternatively while explanations focusing on labour market institutions explain current heterogeneity well many of these institutions pre date the rise in unemployment based on a panel of institutions and shocks for 20 oecd nations since 1960 we find that the interaction between shocks and institutions is crucial to explaining both stylised facts

the propagation of uncertainty shocks rotemberg versus calvo this article studies the effects of uncertainty shocks on economic activity focusing on inflation using a vector autoregression i show that increased uncertainty has negative demand effects reducing gdp and prices i then consider standard new keynesian models with rotemberg type and calvo type price rigidities despite the belief that the two schemes are equivalent i show that they generate different dynamics in response to uncertainty shocks in the rotemberg model uncertainty shocks decrease output and inflation in line with the empirical results by contrast in the calvo model uncertainty shocks decrease output but raise inflation because of firms precautionary pricing motive

international spillovers of policy uncertainty using the baker et al 2013 index of policy uncertainty for six developed countries this paper estimates spillovers of policy uncertainty we find that spillovers account for slightly more than one fourth of the dynamics of policy uncertainty in these countries with this share rising to one half during the financial crisis the us and uk are responsible for a large fraction of the spillovers since the financial crisis while the remaining countries are all net receivers of policy uncertainty shocks during and after this period

thinking about the firm a review of daniel spulber s the theory of the firm in this review i describe how economists have moved beyond the firm as a black box to incorporate incentives internal organization and firm boundaries i then turn to the way that the theory of the firm is treated in daniel spulber s book the theory of the firm microeconomics with endogenous entrepreneurs firms markets and organizations spulber s goal is to explain why firms exist how they are established and what they contribute to the economy to accomplish this spulber defines a firm to be a transaction institution whose objectives differ from those of its owners for spulber this separation is the key difference between the firm and direct exchange between consumers i raise questions about whether this is a useful basis for a theory of the firm jel d21

optimal simple and implementable monetary and fiscal rules welfare maximizing monetary and fiscal policy rules are studied in a model with sticky prices money and distortionary taxation the ramsey optimal policy is used as a point of comparison the main findings are the size of the inflation coefficient in the interest rate rule plays a minor role for welfare it matters only insofar as it affects the determinacy of equilibrium optimal monetary policy features a muted response to output interest rate rules that feature a positive response to output can lead to significant welfare losses the welfare gains from interest rate smoothing are negligible optimal fiscal policy is passive the optimal monetary and fiscal rule combination attains virtually the same level of welfare as the ramsey optimal policy

productivity growth and the structure of the business cycle abstract over the recent years opportunity cost oc models of growth have argued that recessions are times when firms engage in productivity improving activities because of intertemporal substitu tion this paper tests whether this approach is correct the technique used to disentangle the trend from the cycle is semi structural vector autoregression the results are mildly supportive of the oc theory there tends to be a negative impact of demand shocks on productivity both in the short run and in the long run and the short run impact is stronger in those countries where fluctuations are more transitory however there is no significant response of r d to demand shocks

common and country specific economic uncertainty abstract we use a factor model with stochastic volatility to decompose the time varying variance of macroeconomic and financial variables into contributions from country specific uncertainty and uncertainty common to all countries we find that the common component plays an important role in driving the time varying volatility of nominal and financial variables the cross country co movement in volatility of real and financial variables has increased over time with the common component becoming more important over the last decade simulations from a two country dsge model featuring epstein zin preferences suggest that increased globalisation and trade openness may be the driving force behind the increased cross country correlation in volatility

unconventional monetary policy and the credit channel in the euro area abstract we disentangle credit supply and demand and we then embed this information into a bayesian threshold var model to investigate the importance of the demand channel and the broad credit channel in the transmission of unconventional monetary policy on the macroeconomy during financial stress periods we find that during such periods ump shocks boost aggregate demand for loans increase agents net worth and revitalize credit to firms and households in addition counterfactual analysis suggests that non standard policy measures aiming at stimulating loan demand and relaxing banks balance sheet constraints would provide a significant support to economic activity prices and the financial sector

investment shocks and business cycles abstract the origins of business cycles are still controversial among macroeconomists this paper contributes to this debate by studying the driving forces of fluctuations in an estimated new neoclassical synthesis model of the u s economy in this model most of the variability of output and hours at business cycle frequencies is due to shocks to the marginal efficiency of investment imperfect competition and to a lesser extent technological frictions are the key to their transmission although labor supply shocks explain a large fraction of the fluctuations in hours at very low frequencies they are irrelevant over the business cycle this finding is important because the microfoundations of these disturbances are widely regarded as unappealing

vintage capital investment and growth abstract we study the dynamics of growth and investment in a continuous time model with vintage capital vintage capital models may be characterized by non exponential rates of depreciation and technical change and can incorporate gestation lags as well as learning by using we investigate the effect of such features on the dynamics of investment and growth and show how they can contribute to explaining the volatile nature of investment time series

in search of the natural rate of unemployment abstract the natural rate of unemployment can be measured as the time varying steady state of a structural vector autoregression for post war us data the natural rate implied by this approach is more volatile than most previous estimates with its movements accounting for the bulk of the variation in the unemployment rate as well as substantial portions of the variation in aggregate output and inflation these movements in turn can be related to variables associated with labor market search theory including unemployment benefits labor productivity real wages and sectoral shifts in the labor market there is also a strong negative relationship between inflation and the corresponding measure of cyclical unemployment supporting the existence of a short run phillips curve

trend inflation and firms price setting rotemberg versus calvo we compare the calvo and rotemberg price setting mechanisms in a new keynesian model with trend inflation we show that the long run relationship between inflation and output is positive in rotemberg and negative in calvo the dynamics of the two models differ even to a first order approximation positive trend inflation enlarges the determinacy region in the rotemberg model whereas it shrinks it in the calvo model the responses of output and inflation to technology shocks are amplified by trend inflation in calvo whereas they are dampened in rotemberg the two models imply differing non linear adjustments after a disinflation

replacement echoes in the vintage capital growth model this paper is concerned with a non standard source of fluctuations called echo effects i e the ability of an economy to reproduce its own past history in the 1960s growth theorists believed that this property could arise in vintage capital models taking the form of replacement echoes this line of research was stopped after the publication of solow et al 15 who showed that echoes should vanish in a solow growth model with vintage capital however the fundamental reason for this result has nothing to do with vintages rather it comes directly from the main assumption in a solow growth model i e at equilibrium investment is a constant fraction of output and does not depend on any optimal replacement rule we claim that in a more general ramsey model replacement echoes do not necessarily vanish and we show this in the case when instantaneous utility is linear c 1997 academic press

economic policy uncertainty in the us does it matter for the euro area abstract we investigate the effects of a us economic policy uncertainty shock on some euro area macroeconomic aggregates via structural vars we model the indicators of economic policy uncertainty recently developed by baker et al 2013 jointly with the aggregate price indexes and alternative indicators of the business cycle for the two above indicated economic areas according to our svars a one standard deviation shock to us economic policy uncertainty leads to a statistically significant fall in the european industrial production and prices of 0 12 and 0 06 respectively the contribution of the us uncertainty shock on the european aggregates is shown to be quantitatively larger than the one exerted by an euro area specific uncertainty shock

worker heterogeneity the job finding rate and technical change we examine the implications of changes in the skill distribution on the equilibrium matching process and the job finding rate using a directed search approach worker abilities are selected from a distribution while firms face heterogeneous entry costs and direct their job offers to workers we identify conditions under which technical progress increases or decreases the job finding rate allowing for entry and the effects of technical changes on heterogeneity we find that the effects of skill neutral technical progress on job finding rates are unambiguously non negative but the effects of skill biased changes depend on the elasticity of vacancy costs however both skill neutral and skill biased technical changes are pareto improving ex ante if all agents are risk neutral c 2014 elsevier b v all rights reserved

the changing transmission of uncertainty shocks in the u s this article investigates if the impact of uncertainty shocks on the u s economy has changed over time to this end we develop an extended factor augmented vector autoregression var model that simultaneously allows the estimation of a measure of uncertainty and its time varying impact on a range of variables we find that the impact of uncertainty shocks on real activity and financial variables has declined systematically over time in contrast the response of inflation and the short term interest rate to this shock has remained fairly stable simulations from a nonlinear dynamic stochastic general equilibrium dsge model suggest that these empirical results are consistent with an increase in the monetary authorities antiinflation stance and a flattening of the phillips curve supplementary materials for this article are available online

identifying monetary policy in a small open economy under flexible exchange rates abstract previous empirical study on the effects of monetary policy shocks in small open economies has generated puzzling dynamic responses in various macroeconomic variables this paper argues that these puzzles derive from an identification of monetary policy that is inappropriate for such economies to remedy this it is proposed that a structural model be estimated to explicitly account for the features of the small open economy such a model is applied to canada with tightly estimated results overall the dynamic responses to the identified monetary policy shock are consistent with standard theory and highlight the exchange rate as a transmission mechanism

unemployment and growth some empirical evidence from structural time series models this study investigates the empirical relationship between unemployment and growth in a number of oecd economies a structural time series model is used for labour productivity growth to demonstrate that in most economies there seems to be a negative correlation between unemployment and labour productivity growth the results provide little support for the theory that recessions may stimulate productivity growth the use of a structural time series approach allows an attempt to model the underlying dynamics of productivity growth jointly with the effect of unemployment

the unemployment volatility puzzle is wage stickiness the answer i discuss the failure of the canonical search and matching model to match the cyclical volatility in the job finding rate i show that job creation in the model is influenced by wages in new matches i summarize microeconometric evidence and find that wages in new matches are volatile and consistent with the model s key predictions therefore explanations of the unemployment volatility puzzle have to preserve the cyclical volatility of wages i discuss a modification of the model based on fixed matching costs that can increase cyclical unemployment volatility and is consistent with wage flexibility in new matches

macroeconomic policy uncertainty shocks on the chinese economy a gvar analysis abstractthis article studies the spillovers of economic policy uncertainty epu from developed economies to china in terms of the source extent and persistence by estimating a global vector autoregressive gvar model with both financial and trade variables acting as the transmission channels our findings confirm the existence of international transmissions of policy uncertainty while the patterns differ markedly the us epu appears to be the most significant cause of the fall of export industrial production equity price and exchange rate meanwhile the eu epu is also to be blamed for the depreciation of rmb in contrast to industrial production which shows the largest negative impact chinese inflation increases to a relatively smaller extent with the epu shocks ranking as the us japanese and the eu regardless of the minor impact on a long term interest rate the short term interest rate in china reacts positively to the european and us epu shocks despite the independent national monetary poli

on the timing and efficiency of creative destruction we analyze the timing pace and efficiency of ongoing job reallocation that results from product and process innovation there are strong reasons why an efficient economy ought to concentrate both job creation and destruction during recessions when the opportunity cost of reallocation is lowest incomplete contracting between labor and capital can disrupt this synchronized pattern and decouple creation and destruction transactional difficulties also lead to technological sclerosis characterized by excessively slow renovation government incentives to production may alleviate high unemployment but exacerbate sclerosis in contrast creation incentives increase the pace of reallocation an optimal combination of both policies restores economic efficiency

growth and unemployment short run and long run tradeoffs abstract we consider the role of search unemployment and wage bargaining in determining the relationship between growth and unemployment while the long run tradeoffs between unemployment and growth are weak the short run tradeoffs are much stronger their comovement varies along the transitional path and depends upon the underlying structural change the consequences of the growth unemployment nexus for fiscal policy are addressed the analysis provides insights into the debate regarding the appropriate fiscal policy in light of the increased debt following the initial response to the recent financial crisis our analysis strongly supports an increase in government investment as the appropriate fiscal policy

the impact of tfp growth on steady state unemployment theoretical predictions of the impact of total factor productivity tfp growth on unemployment are ambiguous and depend on the extent to which new technology is embodied in new jobs we evaluate a model with embodied and disembodied technology capitalization and creative destruction effects in econometric estimates with a panel of industrial countries we find a large negative impact of tfp growth on unemployment which implies that embodied technology and creative destruction play no role in the steady state dynamics of unemployment capitalization effects explain some of the estimated impact but a part remains unexplained

on the job search and strategic bargaining abstract this paper studies wage bargaining in a simple economy in which both employed and unemployed workers search for better jobs the axiomatic nash bargaining solution and standard strategic bargaining solutions are inapplicable because the set of feasible payoffs is nonconvex i instead develop a strategic model of wage bargaining between a single worker and firm that is applicable to such an environment i show that if workers and firms are homogeneous there are market equilibria with a continuous wage distribution in which identical firms bargain to different wages each of which is a subgame perfect equilibrium of the bargaining game if firms are heterogeneous i characterize market equilibria in which more productive firms pay higher wages i compare the quantitative predictions of this model with burdett and mortensen s 1998 wage differentials employer size and unemployment international economic review 39 257 273 wage posting model and argue that the bargaining model is theoretically more appealing along important dimensions

productivity growth on the job search and unemployment abstract the impact of long run productivity growth on unemployment is studied we incorporate disembodied technological progress and on the job search into the endogenous job separation model of mortensen and pissarides 1994 because we include on the job search faster growth reduces unemployment by decreasing job separation and inducing job creation the incorporation of on the job search substantially improves the ability of the mortensen and pissarides model to explain the effect of growth on labor market variables specifically our model generates not only an empirically consistent sign of the effect but also a larger impact of growth on unemployment than the standard matching model

specific capital and vintage effects on the dynamics of unemployment and vacancies in a reasonably calibrated mortensen and pissarides matching model shocks to average labor productivity can account for only a small portion of the uctuations in unemployment and vacancies shimer 2005a in this paper i argue that if vintage speci c shocks rather than aggregate productivity shocks are the driving force of uctuations the model does a better job of accounting for the data i add heterogeneity in jobs matches with respect to the time

asset bubbles labour market frictions and r d based growth employing an overlapping generations model of research and development r d based growth with labor market frictions this paper examines how employment changes induced by labor market frictions influence asset bubbles and long run economic growth asset bubbles can cannot exist when the employment rate is high low which leads to higher lower economic growth through labor market efficiency we also explore the steady state and transitional dynamics of bubbles economic growth and employment furthermore we show that policy or parameter changes that have a negative influence on the labor market can lead to a bubble burst

were there regime switches in u s monetary policy working paper 2004 14 june 2004 abstract a multivariate model identifying monetary policy and allowing for simultaneity and regime switching in coefficients and variances is confronted with u s data since 1959 the best fit is with a model that allows time variation in structural disturbance variances only among models that also allow for changes in equation coefficients the best fit is for a model that allows coefficients to change only in the monetary policy rule that model allows switching among three main regimes and one rarely and briefly occurring regime the three main regimes correspond roughly to periods when most observers believe that monetary policy actually differed and the differences in policy behavior are substantively interesting though statistically ill determined the estimates imply monetary targeting was central in the early 80s but was also important sporadically in the 70s the changes in regime were essential neither to the rise in inflation in the 70s nor to its decline in the 80s jel classification e52 e47 c53 key words counterfactuals lucas critique policy rule monetary targeting simultaneity volatility model comparison i the debate over monetary policy change in an influential paper clarida gali and gertler 2000 cgg presented evidence that us monetary policy changed between the 1970 s and the 1980 s indeed that in the 70 s it was drastically worse they found that the policy rule apparently followed in the 70 s was one that when embedded in most stochastic general equilibrium models would imply non uniqueness of the equilibrium and hence vulnerability of the economy to sunspot fluctuations of arbitrarily large size their estimated policy rule for the later period on the other hand eliminated this indeterminacy these results are a possible explanation of the volatile and rising inflation of the 70 s and of its subsequent decline the cgg analysis has two important weaknesses one is that it fails to account for stochastic volatility us macroeconomic variables and particularly the federal funds rate have gone through periods of tranquility and of agitation with forecast error variances varying greatly from period to period ignoring such variation does not lead to inconsistent estimates of model parameters when the forecasting equations themselves are constant but it strongly biases toward a finding of changed parameters tests of the stability of the forecasting equations the other weakness is that the cgg analysis rests on powerful and implausible identifying assumptions they require that we accept that the response of the monetary authority to expected future inflation and output does not depend on the recent history of inflation money growth or output it is hard to understand why this should be so especially in the 70 s when monetarism was a prominent theme in policy debates congress was requiring reports from the fed of projected time paths of monetary aggregates and financial markets were reacting sensitively to weekly money supply numbers the requirement for existence and uniqueness of equilibrium in dynamic models is that the monetary policy rule show a more than unit response of interest rates to the sum of the logs of all nominal variables that appear on the right hand side of the reaction function if we force a particular measure of expected future inflation to proxy for all the nominal variables that actually appear independently in the reaction function we are bound to get distorted conclusions on the one hand because expected future inflation will be a noisy measure of the full set of nominal influences on policy we might get downward bias in our estimates from the usual errorsin variables effect on the other hand to the extent that expected future inflation like most expected future values shows less variation than current nominal variables we could find a mistaken scaling up of coefficients

search wage bargains and cycles in this paper i describe an equilibrium model of job matchings with perfect foresight that has the following property the number of people looking for work changes temporarily when there is a temporary shock to the value of labour s marginal product it does not change when the shock is permanent by contrast real wages change temporarily by a small amount when the shock is temporary but change permanently and by a bigger amount when the shock is permanent thus the model offers an explanation for the observation that over the cycle small wage changes are associated with changes in unemployment whereas secularly wage growth does not seem to affect the rate of unemployment the two most common explanations for this observation in the literature the phelps lucas misperceptions model and the lucas rapping intertemporal substitution model are well grounded in equilibrium theory but they have not stood up well to empirical testing the misperceptions model requires more ignorance of aggregate changes than can be reasonably assumed whereas the intertemporal substitution model requires bigger wage elasticities of labour supply than those estimated in the model of this paper neither misperceptions nor changes in the supply of labour play a role in generating the unemployment cycle all agents observe the shocks when they occur and they anticipate correctly the economy s adjustment path but like the new classical explanations of the cycle the model is an equilibrium one in the sense that all private gains from trade are fully exploited at all phases of the cycle although the social gains from trade may not be fully exploited because of search externalities the cycle i derive here is not due to externalities unlike other related perfect foresight models such as diamond s 1982a the structure of the model is such that the externalities do not give rise to multiple equilibria the key element of the model which is responsible for the transmission of output shocks to unemployment is the equation for wages in markets where the allocation of jobs takes place through search both firms and workers have some monopoly power a point emphasised by mortensen 1970 though he attributed only temporary monopoly power and only to firms i use the nash bargaining solution to solve for the equilibrium wage rate and show that the firm s and worker s alternative returns threat points or

business cycle asymmetry a deeper look this paper distinguishes two types of asymmetry in business cycles deepness and steepness deepness is defined as the characteristic that troughs are further below trend than peaks are above most previous research has focused exclusively on steepness which refers to cycles in which contractions are steeper than expansions a test for deepness is proposed and applied to u s post war quarterly unemployment real gnp and industrial production evidence of deepness is found for unemployment and industrial production while the evidence for real gnp is weaker previous evidence of steepness in unemployment is confirmed

growth unemployment and labor market policy the role of passive labor market policy as a possible reason for the run up in relative unemployment rates in europe in the 1980s has been extensively studied more recently the focus have shifted to lagging growth rates in europe the lisbon strategy reflects these concerns by calling for reforms that ease market access promote flexible labor markets and simplify taxes and market regulation the principal purpose of this paper is to build a simple model in which the possible effects of payroll taxes and employment protection policies on both unemployment and growth can be studied the model is constructed of off the shelf parts found in the literatures on equilibrium unemployment and endogenous growth of the schumpeterian variety the model identifies channels though which both taxes and employment protection mandates can adversely affect growth though innovation jel e24 o40 j64 o31

the cleansing effect of recessions the authors investigate industry response to cyclical variations in demand production units that embody the newest process and product innovations are continuously being created and outdated units are being destroyed although outdated units are the most likely to turn unprofitable and be scrapped in a recession they can be insulated from the fall in demand by a reduction in creation the structure of adjustment costs plays a determinant role in the responsiveness of those two margins the calibrated model matches the relative volatilities of the observed manufacturing job creation and destruction series and their asymmetries over the cycle copyright 1994 by american economic association

impact of global uncertainty on the global economy and large developed and developing economies global uncertainty shocks are associated with a sharp decline in global inflation growth and interest rate global uncertainty shocks have more protracted statistically significant and substantia

the effect of power imbalances on incentives to make non contractible investments we use an experiment to study the effect of ex post sharing rules on relationship specific investments in an incomplete contracting context we find that no power structure can induce first best investments and that equally productive partners reach more efficient outcomes with a balanced power structure i e equal sharing of returns than with an asymmetric one in addition we find evidence for behavioural effects partners make higher investments and reach higher efficiency levels than own payoff maximisation would suggest this behaviour is in line with a model where decision makers care about social efficiency it is not consistent with inequity averse preferences