Germany has always been one of the prime examples of institutional complementarities between social insurance, a rather passive welfare state, strong employment protection and collective bargaining that stabilize diversified quality production. This institutional arrangement was criticized for...

Unemployment insurance systems include monitoring of unemployed workers and punitive sanctions if job search requirements are violated. We analyze the effect of sanctions on the ensuing job quality, notably on wage rates and hours worked, and we examine how often a sanction leads to a lower...

Report based on a study conducted for the European Parliament, Bonn 2011 (87 pages)

We examine rational learning among expert chess players and how they update their beliefs in repeated games with the same opponent. We present a model that explains how equilibrium play is affected when players change their choice of strategy when receiving additional information from each...

With ageing populations and a stronger reliance on individual financial decision-making concerning asset portfolios, retirement schemes, pensions and insurances, it becomes increasingly important to understand the determinants of cognitive ability among the elderly. Macro-economic recession and...

Shared-frailty survival models specify that systematic unobserved determinants of duration outcomes are identical within groups of individuals. We consider random-effects likelihood-based statistical inference if the duration data are subject to left-truncation. Such inference with...

The Dutch Hunger Winter (1944/45) is the most-studied famine in the literature on long-run effects of malnutrition in utero. Its temporal and spatial demarcations are clear, it was severe, it was not anticipated, and nutritional conditions in society were favorable and stable before and after...

Report based on a study conducted for the European Parliament, Bonn 2010 (95 pages)

The paper takes a comparative perspective on the labour market impact on G20 and EU countries of the financial and economic crisis that began in 2008. It starts from the observation that the decline in employment and rise in unemployment in relation to output or GDP reductions varies...

This paper uses a social experiment in labour market policy – providing early and intensive monitoring and programme participation in unemployment spells – to assess the nature of labour market policy effectiveness. The experiment was conducted in two counties in Denmark during the winter of...