Growth and welfare distribution in an Ageing society: An applied general equilibrium analysis for the Netherlands

This paper studies the effects of the imminent ageing of the population on economic growth and the distribution of welfare in the Netherlands. It shows that in the current system of social security ageing leads to a considerable welfare loss for future generations. It discusses the effect of reform measures in the pay-as-you-go social security system. It shows that a cut in PAYG pensions is efficiency-improving, but hurts the lower income groups of current generations. This effect can be ameliorated by a debt-financed cut in indirect taxes. In that case the negative welfare effect of the reform for current generations is smaller than the redistribution caused by the demographic shift itself

The Elasticities of Complementarity and Substitution

This paper argues that the conventional definition of the elasticity of complementarity is not well suited to deal with the case of increasing returns. It proposes a slightly different formula, that uses a distance function formulation instead of a production function. The proposed definition coincides with the Hicksian measure in case the production function displays constant returns. It is more informative in case returns to scale are not constant, as it disentangles entry effects and substitution effects of factor supplies. The new definition is also preferable in that it is fully symmetric with the definition of the elasticity of substitution

Optimal Regulation of Lumpy Investments

When a monopolist has discretion over the timing of infrastructure investments, regulation of post-investment prices interferes with incentivizing socially optimal investment timing. In a model of regulated lumpy investment under uncertainty, we study regulation when the regulator can condition price caps on investment timing. We analyse optimal regulation when there is asymmetric information on investment costs and regulation has to respect a budget constraint. We show that optimal regulation involves a price cap that decreases as a function of the monopolist's chosen investment time.

Lifetime labor supply in a search model of unemployment

This paper investigates the age-dependency of participation and unemployment by integrating job search with intertemporal optimizing behavior of finitely-lived households. We find that search frictions and tax rates distort the decisions of older workers to a much larger extent than that of young workers. This finding provides an explanation of the observed fall of participation rates of elder workers as a result of the post-war increase in tax rates and replacement rates. We show that the age pattern of search unemployment does not match observed unemployment and we propose a new concept of ‘voluntary’ unemployment that agrees well with observations