The impact of environmental innovations on firm performance is ambiguous. On the one hand, regulatory-driven environmental innovation may impose additional costs to firms and lower their profits. On the other hand, eco-innovators could profit from lower uncertainty in innovation due to...

Non-technological innovation is an important element of firms' innovation activities that both supplement and complement technological innovation, i.e. the introduction of new products and new processes. We analyse the spread of nontechnological innovation in firms, their relation to...

We examine impacts of different types of environmental innovations on firm profits. Following Porter’s (1991) hypothesis that environmental regulation can improve firms’ competitiveness we distinguish regulation induced and voluntary environmental innovations. We find that innovations which...

This paper compares predictions obtained for the analysis of tax reforms with collective and unitary models of household labour supply and consumption behaviour. We simulate real world microdata by means of a collective approach, using a compound procedure of estimation and calibration based on...

Discontinuities in the employment profile are supposed to cause wage cuts since they imply an interruption in the accumulation of human capital as well as a depreciation of the human capital stock built up in the past. In this paper, we estimate the return to effective experience, taking into...

The Internet is receiving increasing attention as a medium for technology transfer between public research and the enterprise sector. Based on a survey of public research units in natural sciences and engineering in Germany, we analyse the determinants of firm contacts established via the...

This paper examines the wage effects of different types of career interruptions. We consider the timing and duration of non-employment spells by exploiting an administrative data set of German social security accounts (IAB employment sample) supplemented with information on the employees' entire...