In Germany a national travel survey (NTS) was planned for 2002 and was preceded by a pilot study in 2001. As part of this pilot study the state of the practice for NTS in several countries was examined through contact with relevant institutions and persons via the Internet. A structured questionnaire was used for these consultations. The participants in nine countries provided the relevant information ...
This paper analyzes the effect of population size on politicalparticipation and allocative efficiency. Increasing populationis generally found to reduce political participation. However,since participation is not evenly spread throughout thepopulation, this will have consequences for allocation.Namely, we argue that increasing population size shifts powerto the rich. We discuss the consequences for ...
The German unemployment rate shows strong signs if non-stationarity over the course of the previous decades. This is in line with an insider-outsider model under full hysteresis. We applied a "theory-guided view" to the data using the structural VAR model as developed by Balmaseda, Dolado and López-Salido (2000) allowing for full hysteresis on the labour market. Our identification of the model implies ...
Typically, laboratory experiments suffer from homogeneous subject pools and selfselection biases. The usefulness of survey data is limited by measurement error and by the questionability of their behavioral relevance. Here we present a method integrating interactive experiments and representative surveys thereby overcoming crucial weaknesses of both approaches. One of the major advantages of our approach ...
We consider a model of an information network where nodes can fail and transmission of information is costly. The formation of paths in such networks is modeled as the Nash equilibrium of an N player routing game. The task of obtaining this equilibrium is shown to be NP-Hard. We derive analytical results to identify conditions under which the equilibrium path is congruent to well known paths such as ...
Many validation studies deal with item-nonresponse and measurement error in earnings data. In this paper we explore motives of respondents for the failure to reveal earnings using the German Socio-Economic Panel (GSOEP). GSOEP collects socio-economic information of private households in the Federal Republic of Germany. We explain the evolution of income-nonresponse in the GSOEP and demonstrate the ...
A new method for constructing R&D capital stocks is proposed. Following Schumpeter, the development of R&D capital stocks is modelled as a process of creative destruction. Newly generated knowledge is assumed not only to add to the existing R&D capital stocks but also, by displacing old knowledge, to destroy part of that capital. This is in stark contrast to the perpetual inventory method, which postulates ...
Becker and Murphy (1988) constructed, in a well-known paper, a model of rational addiction in which people solve a dynamic optimization problem, choose an optimal timepath of drug consumption and thereby maximize lifetime utility. The model leads to the hypothesis that future consumption is a significant explanatory variable for present consumption. This paper briefly surveys the empirical studies ...