Public Investment in a Small Open Economy

We study the effects of public investment in a dynamic overlapping-generations model of a small open economy. Boosting public investment stimulates private capital formation, output, employment, and wages in the long run. The impact effects depend critically on whether public capital is modeled as a stock or as a flow. The welfare benefits are unevenly distributed across generations since capital ownership, and the capital gain induced by the policy shock, rises with age, and because wages rise only gradually under the stock interpretation of public capital. A suitable egalitarian bond policy can be employed to ensure that everybody gains to the same extent. With this additional instrument the intergenerational externality can be neutralized and the resulting efficiency gain coincides with the one obtained in the corresponding representative agent model. A simple modified golden rule for public investment is derived which takes into account the time that is needed to build the public capital stock.public investment;intergenerational welfare effects

Labor Tax Reform and Equilibrium Unemployment: A Search and Matching Approach

The paper studies simple strategies of labor tax reform in a search and matching model of the labor market featuring endogenous labor supply.Changing the composition of the tax wedge|that is, reducing a payroll tax and increasing a progressive wage tax such that the marginal tax wedge remains unaffected|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.A strategy of replacing employment taxes by payroll taxes increases employment and reduces the equilibrium unemployment rate, while the effect on public revenue is ambiguous.labour market;taxation;unemployment;matching

The Environmental and Macroeconomic Effects of Socially Responsible Investment

We analyze the effects of socially responsible investment and public abatement on environmental quality and the economy in a continuous-time dynamic growth model featuring optimizing households and firms. Environmental quality is modelled as a renewable resource. Consumers can invest in government bonds or firm equity. Since investors feel partly responsible for environmental pollution when holding firm equity, they require a premium on the return to equity. We show that socially responsible investment behaviour by households partially offsets the positive effects on environmental quality of public abatement policies.socially responsible investment, economic growth, environmental economics, resource dynamics, stock market

Annuity Market Imperfection, Retirement and Economic Growth

We study the effects of an annuity market imperfection on individual agents’ labour supply and retirement decisions and on the macroeconomic growth rate in an overlapping generations model with endogenous growth. We model imperfect annuities by introducing a load factor on the interest rate faced by finitely-lived agents. Our core model features age-independent wages and a constant mortality rate. In the first extension we study the implications for microeconomic decisions and macroeconomic outcomes of a hump-shaped life-cycle profile in labour productivity, whilst in the second extension we postulate a realistic mortality process. Our main findings are that the limited availability of annuities induces agents to retire early in the first two models, but later in the model with age-dependent mortality. In all cases, the general equilibrium repercussion is that economic growth is lower under imperfect annuities than with perfect annuities.annuity markets, retirement, endogenous growth, overlapping generations, demography

The macroeconomic dynamics of demographic shocks

The paper employs an extended Yaari-Blanchard model of overlapping generations to study how the macroeconomy is affected over time by various demographic changes. It is shown that a proportional decline in fertility and death rates has qualitatively similar effects to capital income subsidies; both per capita savings and per capita consumption increase in the new steady state. A drop in the birth rate, while keeping the death rate constant, reduces per capita savings, but increases per capita consumption, particularly if intertemporal labor supply is very elastic. If the generational turnover effect is sufficiently strong, however, a decline in the birth rate may, contrary to standard results, gives rise to an increase in per capita savings. Finally, a fertility rate reduction which leaves unaffected the rate of generational turnover is shown to have effects qualitatively similar to those of a fall in public consumption. Both per capita savings and per capita output decline, but per capita consumption rises. The non-linear model is simulated to study the quantitative effects of non-infinitesimal demographic shocks.

Intergenerational and international welfare leakages of a tariff in a small open economy

A dynamic overlapping-generations model of a small open economy with imperfect competition in the goods market is constructed. A tariff increase reduces output and employment and leads to an appreciation of the real exchange rate both in the impact period and in the new steady state. The tariff shock has significant intergenerational distribution effects. Old existing generations gain less than both younger existing generations and future generations. Bond policy neutralizes the intergenerational inequities and allows the computation of first-best and second-best optimal tariff rates. The first-best tariff exploits national market power, but the second-best tariff contains a correction to account for the existence of a potentially suboptimal product subsidy.

Darwinian Explanations of the Origin of Language

Woudenberg, R. van [Promotor]Reenen, P.Th. van [Copromotor

Deposit-Refund on Labor: A Solution to Equilibrium Unemployment?

The paper studies the employment effects of a deposit-refund scheme on labor in a simple search-theoretic model of the labor market. It is shown that if a firm pays a deposit when it fires a worker, to be refunded when it employs the same or another worker, the vacancy rate increases and the unemployment rate declines. The scheme introduces rigidities in the labor market, however, which may be undesirable in countries wanting to liberalize their labor markets. Copyright 2002, International Monetary Fund

A Life-Cycle Overlapping-Generations Model of the Small Open Economy

In this paper we construct an overlapping generations model for the small open economy incorporating a realistic description of the mortality process. With agedependent mortality, the typical life-cycle pattern of consumption and saving results from the maximizing behaviour of individual households. Our ?Blanchard-Yaari-Modigliani?model is used to analytically study a number of typical shocks affecting the small open economy, namely a balanced-budget public spending shock, a temporary Ricardian tax cut, and an interest rate shock. The demographic details matter a lot?both the impulse-response functions and the welfare profiles (associated with the different shocks) are critically affected by them. These demographic details furthermore do not wash out in the aggregate. The model is flexible and can be applied to a wide variety of theoretical and policy issues.