Monetary Shocks in a Model with Skill Loss

Unemployment shows persistent and long‐lasting responses to nominal and real shocks. Standard real business cycle models with search frictions but a homogeneous labor force are able to generate some volatility and persistence, but not enough to match the empirical evidence. Moreover, empirical studies emphasize the importance of the heterogeneity of the unemployment pool to fully understand unemployment dynamics. In particular, in most European countries the incidence of long‐term unemployment is large and well known. One of the possible causes/consequences of long‐term unemployment is the skill deterioration of the unemployment pool. In this paper, we introduce the skill loss mechanism, and therefore a heterogeneous labor force, in a New Keynesian framework with search frictions. Calibrating the model for the Spanish economy, we show that while the skill loss mechanism helps to explain the magnitude of the response of unemployment to monetary shocks, it does not improve the performance of the homogeneous worker model in terms of the persistence of the response, especially for short‐ and long‐term unemployment.     

Search Frictions,Labor Supply,and the Asymmetric Business Cycle

We develop a business cycle model that generates asymmetry between peaks and troughs of the unemployment rate and symmetric fluctuations of the participation rate as in the U.S. data. We calibrate the model and find that search frictions are solely responsible for the peak–trough asymmetry. Participation decisions do not generate asymmetry but contribute to the fluctuations in search frictions by changing the size and composition of the pool of job seekers, which in turn affects the tightness ratio and thereby slack in the labor market. The participation rate would be counterfactually asymmetric absent labor supply responses to shocks.     

Aggregate implications of indivisible labor, incomplete markets, and labor market frictions

We study the impact of tax and transfer programs on steady-state allocations in a model with search frictions, an operative labor supply margin, and incomplete markets. In a benchmark model that has indivisible labor and incomplete markets but no trading frictions we show that the aggregate effects of taxes are identical to those in the economy with employment lotteries, though individual employment and asset dynamics can be different. The effect of frictions on the response of aggregate hours to a permanent tax change is highly nonlinear. There is considerable scope for substitution between “voluntary” and “frictional” nonemployment in some situations.     

Asymmetric Labor Market Institutions in the EMU and the Volatility of Inflation and Unemployment Differentials

How does the asymmetry of labor market institutions affect the adjustment of a currency union to shocks? To answer this question, this paper sets up a dynamic currency union model with monopolistic competition and sticky prices, hiring frictions, and real wage rigidities. In our analysis, we focus on the differentials in inflation and unemployment between countries, as they directly reflect how the currency union responds to shocks. We highlight the following three results. First, we show that it is important to distinguish between different labor market rigidities as they have opposite effects on inflation and unemployment differentials. Second, we find that asymmetries in labor market structures tend to increase the volatility of both inflation and unemployment differentials. Finally, we show that it is important to take into account the interaction between different types of labor market rigidities. Overall, our results suggest that asymmetries in labor market structures worsen the adjustment of a currency union to shocks.     

Emerging Market Business Cycles: The Role of Labor Market Frictions

Emerging economies are characterized by higher variability of consumption and real wages relative to output and a strongly countercyclical current account. A small open economy model with search‐matching frictions and countercyclical interest rate shocks can account for these regularities. Search‐matching frictions affect permanent income, and increase future employment uncertainty, heightening workers' incentives to save and generating a greater response of consumption and the current account. The greater consumption response feeds into larger fluctuations in workers' willingness to work, while interest rate shocks lead to variations in firms' willingness to hire; both of these outcomes contribute to highly variable wages.     

Understanding European unemployment with a representative family model

A representative family model with indivisible labor and employment lotteries has no labor market frictions and complete markets. Nevertheless, its aggregate responses to an increase in government supplied unemployment insurance (UI) and to an increase in microeconomic turbulence are qualitatively similar to those in two macromodels with labor market frictions and incomplete markets, namely, the matching and search-island models in Ljungqvist and Sargent [2007a. Understanding European unemployment with matching and search-island models. Journal of Monetary Economics, this issue]. Because there is no frictional unemployment in the representative family model, an increase in employment protection (EP) decreases aggregate work because the representative family substitutes leisure for work, an effect opposite to what occurs in matching and search-island models. Heterogeneity among workers highlights the economy-wide coordination in labor supply and consumption sharing that employment lotteries and complete markets achieve in the representative family model. A high disutility of labor makes generous UI cause very low employment levels.     

Real Effects of Money Growth and Optimal Rate of Inflation in a Cash‐in‐Advance Economy with Labor‐Market Frictions

This paper studies the consequences of labor‐market frictions for the real effects of steady inflation when cash is required for households' consumption purchases and firms' wage payments. Money growth may generate a positive real effect by encouraging vacancy creation and raising job matches. This may result in a positive optimal rate of inflation, particularly in an economy with moderate money injections to firms and with nonnegligible labor‐market frictions in which wage bargains are not efficient. This main finding holds for a wide range of money injection schemes, with alternative cash constraints, and in a second‐best world with preexisting distortionary taxes.     

Ramsey monetary policy with labor market frictions

Traditional New Keynesian models prescribe that optimal monetary policy should aim at price stability. In the absence of a labor market frictions, the monetary authority faces no unemployment/inflation trade-off. The design of optimal monetary policy is analyzed here for a framework with sticky prices and matching frictions in the labor market. Optimal policy features deviations from price stability in response to both productivity and government expenditure shocks. When the Hosios [1990. On the efficiency of matching and related models of search and unemployment. Review of Economic Studies 57 (2), 279-298] condition is not met, search externalities make the flexible price allocation unfeasible. Optimal deviations from price stability increase with workers’ bargaining power, as firms incentives to post vacancies fall and unemployment fluctuates above the Pareto efficient one.     

Uncertainty shocks are aggregate demand shocks

Search frictions in the labor market give rise to a new option-value channel through which uncertainty affects aggregate economic activity, and the effects of which are reinforced by the presence of nominal rigidities. With these features, an increase in uncertainty resembles an aggregate demand shock because it increases unemployment and lowers inflation. Using a new empirical measure of uncertainty based on the Michigan survey and a VAR model, we show that these theoretical patterns are consistent with US data. Using a calibrated DSGE model, we show that combining search frictions and nominal rigidities can match the qualitative VAR pattern and account for about 70 percent of the empirical increase in unemployment following an uncertainty shock.     

Welfare Cost of Fluctuations When Labor Market Search Interacts with Financial Frictions

We study the welfare costs of business cycles in a search and matching model with financial frictions. The model replicates the volatility on labor and financial markets. Business cycle costs are sizable. Indeed, the interactions between labor market and financial frictions magnify the impact of shocks via (i) a credit multiplier effect and (ii) an endogenous wage rigidity inherent to financial frictions. In addition, in a nonlinear framework, large welfare costs of fluctuations are explained by the high average unemployment and the low job finding rates with respect to their deterministic steady‐state values.     

Optimal Monetary Policy Rules and House Prices: The Role of Financial Frictions

We probe the scope for reacting to house prices in simple and implementable monetary policy rules, using a New Keynesian model with a housing sector and financial frictions on the household side. We show that the social‐welfare‐maximizing monetary policy rule features a reaction to house price variations, when the latter are generated by housing demand or financial shocks. The sign and size of the reaction crucially depend on the degree of financial frictions in the economy. When the share of constrained agents is relatively small, the optimal reaction is negative, implying that the central bank must move the policy rate in the opposite direction with respect to house prices. However, when the economy is characterized by a sufficiently high average loan‐to‐value ratio, then it becomes optimal to counter house price increases by raising the policy rate.     

Labor market reform and price stability: An application to the Euro Area

Central bankers frequently suggest that labor market reform may be beneficial for inflation management. This paper investigates this topic by simulating the effects of reductions in firing costs and unemployment benefits on inflation volatility in the Euro Area, using an estimated New Keynesian model with search and matching frictions. Qualitatively, changes in labor market policies alter the volatility of inflation in response to shocks, by affecting the volatility of the three components of real marginal costs (hiring costs, firing costs and wage costs). Quantitatively, we find, however, that neither policy is likely to have an important effect on inflation volatility, due to the small contribution of hiring and firing costs to inflation dynamics.     

Animal Spirits,Financial Markets,and Aggregate Instability

This paper examines whether people's animal spirits were drivers of U.S. business cycle fluctuations. In the context of an estimated macroeconomy with endogenous financial market frictions, allowing for “psychological” or nonfundamental expectational shocks improves the fit of the model and, at the posterior mode, these shocks account for well over one-third of output fluctuations. Exogenous financial frictions are considerably less important. U.S. data favor the indeterminacy model over versions of the economy in which animal spirits cannot play a role.     

Labor market participation,unemployment and monetary policy

Models of unemployment and monetary policy usually assume constant participation. Incorporating a participation decision into a standard New Keynesian model with matching frictions, we show that market tightness becomes endogenously more volatile because both the opportunity cost of home production and the reservation wage vary with participation. The model can simultaneously explain the low volatility of participation, the high volatility of unemployment, and a procyclical workers׳ outside option of working. A policy of strict inflation targeting is close to optimal, and increasing the response of the interest rate to inflation does not have a large impact on the volatility of unemployment because of the endogenous response of participation.     

Optimal Fiscal and Monetary Policy in Customer Markets

We present a model in which some goods trade in “customer markets” and advertising facilitates long‐lived relationships. We estimate the model on U.S. data and find a large congestion externality in the pricing of customer market goods. This motivates the analysis of optimal policy. Under a complete set of taxes, fiscal policy eliminates the externalities with large adjustments in tax rates on customer markets goods, while labor tax volatility remains low. Constraining the instruments to the interest rate and labor tax, the optimal labor tax displays large and procyclical fluctuations, but monetary policy is little changed compared to a model with no customer markets.     

Labor Force Participation and Monetary Policy in the Wake of the Great Recession

This paper provides compelling evidence that cyclical factors account for the bulk of the post‐2007 decline in the U.S. labor force participation rate (LFPR). We then formulate a stylized New Keynesian model in which the LFPR is practically acyclical during “normal times” but drops markedly following a large and persistent aggregate demand shock. These considerations have potentially crucial implications for the design of monetary policy, especially when interest rate adjustments are constrained by the zero lower bound; specifically, monetary policy can induce a more rapid recovery of the LFPR by allowing the unemployment rate to fall below its natural rate.     

Screening and Labor Market Flows in a Model with Heterogeneous Workers

We construct a model in which screening of heterogeneous workers by employers plays a central role in determining both the flows into and out of unemployment. Following a negative productivity shock, the share of low‐efficiency workers in the pool of unemployed rises, and this composition effect reduces the incentive of firms to post vacancies, lowering job opportunities for all workers. Heterogeneity in workers’ efficiency amplifies unemployment fluctuations in economies with small gross labor flows and leads to persistent buildups of unemployment and slow recoveries. The composition effect worsens the unemployment–inflation trade‐off faced by the monetary authority, leading to very large sacrifice ratios when a fall in productivity primarily affects low‐efficiency workers.     

The (ir)relevance of real wage rigidity in the New Keynesian model with search frictions

We develop a New Keynesian model with search and matching frictions in the labor market. We show that the model generates counterfactual labor market dynamics. In particular, it fails to generate the negative correlation between vacancies and unemployment in the data, i.e., the Beveridge curve. Introducing real wage rigidity leads to a negative correlation, and increases the magnitude of labor market flows to more realistic values. However, inflation dynamics are only weakly affected by real wage rigidity. The reason is that labor market frictions give rise to long-run employment relationships. The measure of real marginal costs that is relevant for inflation in the Phillips curve contains a present value component that varies independently of the real wage.     

Optimal student loans and graduate tax under moral hazard and adverse selection

We characterize the set of second‐best “menus” of student‐loan contracts in an economy with risky labor‐market outcomes, adverse selection, moral hazard, and risk aversion. We combine student loans with optimal income taxation. Second‐best optima provide incomplete insurance because of moral hazard. Optimal repayments must be income contingent, or the income tax must comprise a graduate tax. Individuals are ex ante unequal because of differing probabilities of success, and ex post unequal, because taxation trades off incentives and redistribution. In addition, second‐best optima exhibit an interim equalization property: the poststudy but prework expected utilities of newly graduated student types must be equal.     

Human Capital,Bankruptcy, and Capital Structure

We derive the optimal labor contract for a levered firm in an economy with perfectly competitive capital and labor markets. Employees become entrenched under this contract and so face large human costs of bankruptcy. The firm's optimal capital structure therefore depends on the trade‐off between these human costs and the tax benefits of debt. Optimal debt levels consistent with those observed in practice emerge without relying on frictions such as moral hazard or asymmetric information. Consistent with empirical evidence, persistent idiosyncratic differences in leverage across firms also result. In addition, wages should have explanatory power for firm leverage.