We investigate whether a government should lead an activist policy in a rigorous utility maximizing framework under rational expectations. The economy is a monetary one with preset wages, and is subject to both demand and supply shocks. It is assumed that the government can never act on the...

[Inhaltsverzeichnis] 1. Lohnspreizung - Ein gesellschaftspolitisches Problem 2. Theoretische Erklärungsansätze zur Lohnspreizung 2.1. Einfaches Arbeitsmarktmodell mit homogenen Arbeitsangebot 2.2. Einfaches Arbeitsmarktmodell mit heterogenen Arbeitsangebot 2.3. trade-off-Hypothese zwischen...

Design-based estimators of totals, means or proportions in finite populations generally are functions of weighted sums. If each element selected into the sample is also observed, then for the calculation of the pi-estimator these weights are just the inverse inclusion probabilities of the...

In this paper, a weight is derived for the calculation of design based estimators of totals, means and proportions using the ongoing German Socio-Economic Panel (GSOEP) and a new cross-sectional sample. In the first part of the paper, the selection schemes of the subsamples A, B, C and D of the...

Options for reforming unfunded public pension schemes that are now being discussed all share the feature that the burden induced by demographic change would be shifted towards presently living and away from unborn generations. Existing models of the political economy of pension reform can not...

A simulation study designed to evaluate the pseudo-R2 proposed by Spiess and Keller (1999) suggests that this measure represents the goodness-of-fit not only of the systematic part, but also of the assumed correlation structure in binary panel probit models.

The results of two simulation studies suggest a mixed `generalized estimating/pseudo-score equations' approach to lead to more efficient estimators than a GEE approach proposed by Qu, Williams, Beck and Medendorp (1992) or a three-stage approach as proposed e.g. by Schepers, Arminger and...

The techniques of simple random sampling are seldom appropriate in the empirical analysis of income distributions. Various types of weighting schemes are usually required either from the point of view of welfare-economic considerations (the mapping of household/family distributions into...

Research on processes of innovation has emphasised the role of (publicly funded) research institutions (RTOs) as well as the embeddedness of innovation procedures in a systemic context. This paper deals with the changing contribution of RTOs to innovation systems due to the emergence of a highly...