Randomized experiments provide policy relevant treatment effects if there are no spillovers between participants and nonparticipants. We show that this assumption is violated for a Danish activation program for unemployed workers. Using a difference-in-difference model we show that the...

This paper develops a three stage oligopoly game for R&D cooperation, R&D expenditure and product market competition. In the first stage, firms decide whether or not to conduct R&D in cooperation with other firms. In the second stage the level of R&D investment is determined. Finally, firms...

Applying data from 13 waves of the Swiss Labor Force Survey (1991-2003) I assess costs and benefits of fixed-term contracts. First, I analyze the existence of a contract related wage gap and the effort response of temporary employees in terms of unpaid overtime hours. Second, I investigate...

In this paper we compare the new satisfaction evaluation approach, developed in the nineties by Oswald, Clark, Blanchflower and others with the older income evaluation (IEQ) approach, developed by Van Praag and Kapteyn in the seventies of the previous century. We find that both approaches yield...

In the present study we investigate the relationship between foreign ownership and innovation activities using the firm-level data of the third Community Innovation Survey (CIS) covering 12 European countries. Probit estimates based on 28,000 firms observations show that foreign owned firms are...

Survey research studies make extensive use of rating scales to measure constructs of interest. The bounded nature of such scales presents econometric estimation challenges. Linear estimation methods (e.g. OLS) often produce predicted values that lie outside the rating scales, and fail to account...

In this paper we compare the new satisfaction evaluation approach, developed inthe nineties by Oswald ,Clark , Blanchflower and others with the older incomeevaluation (IEQ) approach, developed by Van Praag and Kapteyn in theseventies of the previous century. We find that both approaches yield...

This paper develops a sample selection model for fractional response variables, i.e., variables taking values in the [0, 1]-interval. It provides an extension of the Papke and Wooldridge (1996) fractional probit model to the case of non-random sample selectivity. The model differs from the...

Harmful algal bIoom species are the cause of important damages to marine living resources and human beings. These marine species are primarily introduced in North-European waters through ballast water, i.e. water trans-ported across the oceans so as to keep a vessel in balance. Port authorities...