Job search,unemployment and savings

This paper examines optimal search policies on the basis of two alternative assumptions, first that individuals consume income as it is received, and second, that individuals can save and subsequently draw from their savings. In this model workers search for heterogeneousjobs, which are characterized by fixed wages and random duration of employment spells. Workers choose jobs which will maximize the total expected lifetime utility of consumption. The optimal steady-state job acceptance policy in both cases takes the form of a fixed partition of the set of all job offers into acceptable and unacceptable ones. In the absence of a capital market, employment duration appears to be irrelevant for the marginal job offer and all jobs offering wages which exceed the marginal one are also acceptable independent of the distribution functions of employment duration. Nevertheless, the dispersion of employment duration at inframarginal acceptable jobs affects job choice. It is shown that when individuals can save, and if current utility and probability density functions are exponential, then steady-state rates of saving during periods of employment, and of dissaving during periods of unemployment, are independent of wealth and constant. The model developed is then used to examine the determinants of unemployment and the properties of optimal savings rates, and to obtain a number of testable hypotheses about savings behavior and job security.     

Labor tax reform, unemployment, and search

A key obstacle to reducing payroll taxes in many industrialized and transition countries is the direct revenue loss to the government that it implies. This paper studies a simple and practical labor tax reform of reducing a payroll tax and increasing a progressive wage tax that keeps the marginal tax wedge unchanged. Such a strategy increases employment, reduces the equilibrium unemployment rate, and increases public revenue as long as workers do not have all the bargaining power in wage negotiations. Moreover, welfare rises if workers’ bargaining power is sufficiently large to exceed a critical value determined by the second-best Hosios condition.      

Skills, search and the persistence of high unemployment

The persistence of high-unemployment rates in Europe has fueled theories advocating the existence of multiple natural rates of unemployment. Labor-market institutions and increasing returns to scale have been singled out as the main causes of multiplicity and, therefore, of high-unemployment traps. The contribution of this paper is both to expand the set of mechanisms leading to multiple natural rates of unemployment and to establish a minimum set of assumptions under which such multiplicity may arise. To this aim, a search-matching model is presented where households allocate time to market and non-market activities, and invest both in physical and human capital. It is shown that under the standard assumption of concavity in production and matching such a model yields multiple long-run equilibria with different rates of unemployment. This result does not rely on labor-market institutions or increasing returns to scale. Multiplicity in our model arises from differences in the intensity of use of human capital across time-consuming activities.     

Productivity and unemployment over the business cycle

The low correlation between cyclical unemployment and productivity over the post-war period hides a large sign switch in the mid-1980s: from significantly negative the correlation became significantly positive. Using a search model of unemployment with nominal rigidities and variable labor effort, I show that technology shocks can generate a positive unemployment-productivity correlation whereas non-technology shocks (i.e. aggregate demand shocks) tend to do the opposite. In this context, I identify two events that can quantitatively explain the increase in the correlation: (i) a sharp drop in the volatility of non-technology shocks in the mid-1980s, and (ii) a decline in the response of productivity to non-technology shocks, which from procyclical became acyclical in the last 25 years.     

Environmental policy,pollution, unemployment,and endogenous growth

The paper develops a model of endogenous economic growth with pollution externalities and a labor market distorted by union monopoly power and by taxes and transfers. We study the optimal second-best pollution tax and abatement policy and find that a shift toward greener preferences will tend to reduce unemployment, although it will hamper growth. We also find that greater labor-market distortions call for higher pollution tax rates. Finally, we show that a switch from quantity control of pollution combined with grandfathering of pollution rights to regulation via emission charges has the potential to raise employment, growth, and welfere without damaging the environment.     

In search of the natural rate of unemployment

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.     

Pension reform,retirement, and life-cycle unemployment

This paper investigates the labor market impact of four often proposed policy measures for sustainable pensions: strengthening the tax benefit link, moving from wage to price indexation of benefits, lengthening calculation periods, and introducing more actuarial fairness in pension assessment. We consider the impact on three margins of aggregate labor supply, retirement behavior, job search, and hours worked. We provide some analytical results and use a computational model to demonstrate the economic impact of recent pension reform in Austria. Reducing the distortion in the retirement decision by introducing pension supplements and discounts conditional on the chosen retirement date promises the largest gains. We also find that the pension reform is far from sufficient to offset the fiscal implications of projected demographic change in Austria.     

Dynamic fiscal policies and unemployment in a simple endogenous growth model

This paper analyzes the growth and employment effects of dynamic fiscal policies in an overlapping generations model with endogenous growth and imperfect labour markets. With balanced-budget policies, the modelled closed economy grows at a constant rate which is higher, the lower are the labour tax rate and the unemployment rate. Constant-flow budget policies are not feasible, while government Ponzi games are feasible only if economic agents have implausibly high savings rates. Furthermore, while constant-stock fiscal policies are sustainable, an increase in the debt-to-capital ratio is accompanied by higher taxes, a rise in unemployment and lower economic growth. JEL Classification E24 · J51 · H63 · O41     

Liquidity provision,interest rates,and unemployment

The effective liquidity supply of the economy—the weighted-sum of all assets that serve as media of exchange—matters for interest rates and unemployment. We formalize this idea by adding an over-the-counter market with collateralized trades to the Mortensen–Pissarides model. An increase in public liquidity through a higher supply of real government bonds raises the real interest rate, crowding out private liquidity and increasing unemployment. If unemployment is inefficiently high, keeping liquidity scarce can be socially optimal. A liquidity crisis affecting the acceptability of private assets as collateral widens the rate-of-return difference between private and public liquidity, also increasing unemployment.     

全要素生产力推动中国经济增长

比较普遍的观点认为：中国经济增长仅仅依赖投资等扩大生产的手段。最近万事达卡国际组织最新发布的报告则指出,自1978年以来,生产力提高才是促进中国经济发展的重要因素。中国未来15年的经济高速增长的持续性（年均9％～10％）主要决定于TFP（TFP,即全要素生产力）的增长。仅利用持续大量投资刺激增长是不起作用的。换言之,当今的中国面临着经济发展的转折点。过去几十年中,中国TFP的快速发展证明,中国已通过有效手段建立了稳固基础。未来的挑战将是如何保障发展,以期年均实际GDP增长达到3％～4％。要实现这一愿景,中国必须采取改革措施,纠正结构性失衡、市场扭曲和效率低下的问题。就万事达组织对中国政府提出的综合改革措施建议,本刊记者采访了万事达国际组织亚太区首席经济学家王月魂博士。     

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.     

Human capital costs,firm leverage,and unemployment rates

Because bankruptcy is costly for employees, theoretical studies argue that firms with higher leverage have to pay their employees higher wages. In this paper we empirically test this prediction. We find that firm leverage is positively related to the wages of employees, both in the United States and in the Netherlands. In the United States, the positive relation between wages and leverage is strongest in the 21st century, which is a period that also shows a positive relation between wages and unemployment rates. We conclude that the human capital costs of bankruptcy are an important disadvantage of debt.     

Comparative advantage and unemployment

Worker heterogeneity in productivity and labor supply is introduced into a matching model. Workers who earn high wages and work high-hours are identified as those with strong market comparative advantage—high rents from being employed. The model is calibrated to match separation, job finding, and employment in the SIPP data. The model predicts a big drop in employment for workers with weak comparative advantage during recessions. But the data show that workers with strong comparative advantage also display sizable employment fluctuations, implying that aggregate employment fluctuations are not explained by the responses of workers with small rents to employment.     

Land prices and unemployment

We integrate the housing market and the labor market in a dynamic general equilibrium model with credit and search frictions. We argue that the labor channel, combined with the standard credit channel, provides a strong transmission mechanism that can deliver a potential solution to the Shimer (2005) puzzle. The model is confronted with U.S. macroeconomic time series. The estimation results account for two prominent facts observed in the data. First, land prices and unemployment move in opposite directions over the business cycle. Second, a shock that moves land prices also generates the observed large volatility of unemployment.     

In-work benefits and unemployment

In-work benefits are becoming an increasingly relevant labour market policy, gradually expanding in scope and geographical coverage. This paper investigates the equilibrium impact of in-work benefits and contrasts it with the traditional partial equilibrium analysis. We find under which conditions accounting for equilibrium wage adjustments amplifies the impact of in-work benefits on search intensity, participation, employment, and unemployment, compared to a framework in which wages are fixed. We also account for the financing of these benefits and determine the level of benefits necessary to achieve efficiency in a labour market characterized by search externalities.     

Stagflation,persistent unemployment and the permanence of economic shocks

When changes occur, people do not know how long they will persist. Using a simple stochastic structure that incorporates temporary and permanent changes in an augmented IS-LM model, we show that rising prices and rising unemployment — stagflation is likely to follow a large permanent reduction in productivity. All markets clear and all expectations are rational. People learn gradually the permanent values which the economy will reach following a permanent shock and gradually adjust anticipations. In our model, optimally perceived permanent values take the form of a Koyck lag of past observations.     

Productivity growth and biased technological change: Credit banks in Japan

This paper investigates the productivity change of Japanese credit banks with a Malmquist index and the input technological bias during 2000–2006. Our results indicate that the traditional growth accounting method, which assumes Hicks neutral technological change, is not appropriate for analyzing changes in productivity. Our analysis unambiguously shows that management of Shinkin banks has to be improved. These must be based on the improvement of technical efficiency and/or technological change, emulating the procedures of the best-practice banks, i.e., those banks with Malmquist productivity scores higher than one and simultaneously with technical efficiency and technological change higher than one.