Testosterone, which induces sexual differentiation of the male fetus, is believed to transfer from males to their littermates in placental mammals. Among humans, individuals with a male twin have been found to exhibit greater masculinization of sexually dimorphic attributes relative to those...

This paper derives the conditions under which fitness-reducing alleles can survive in a long-run stationary equilibrium for a trading population, extending the results in Saint-Paul (2002) for arbitrary systems of sexual reproduction. -- trade ; genotypes ; natural selection ; gene-culture...

The problem with most intergenerational mobility estimates is that unmeasured and inherited abilities prevent us from drawing inferences. In this paper we estimate the intergenerational mobility of schooling and exploit differences between adopted and own birth children to obtain genetically...

The aim of the current paper is to estimate the need for new PhDs in the Estonian academic sector for the 5-year period 2007-2012 using a survey of employers, such as universities, institutions of applied higher education and research institutes. The doctoral workforce in all countries around...

Using data on executive compensation for the German chemical industry, we investigate the relevance of two theoretical approaches that focus on bonuses as part of a long term wage policy of a firm. The first approach argues that explicit bonuses serve as substitutes for implicit career concerns....

Academic careers in Germany have been under debate for a while. We conduct a survey among postdocs in Germany, to analyze the perceptions and attitudes of postdocs regarding their research incentives, their working conditions, and their career prospects. We conceptualize the career prospects of...

Much of human knowledge is produced in the world's university departments. There is little scientific evidence, however, about how those hundreds of thousands of departments are best organized and led. This study hand-collects longitudinal data on departmental chairpersons in 58 US universities...

In the New England Journal of Medicine, Longo and Drazen critically assessed the concept of data sharing. Their main concern is that a "new class of research person will emerge" that uses data, which were gathered by other researchers, for their own original research questions. The authors...

We test how a reduction in travel cost affects the rate and direction of scientific research. Using a fine-grained, scientist-level dataset within chemistry (1991-2012), we find that after Southwest Airlines enters a new route, scientific collaboration increases by 50%, an effect that is...

Based on a unique time-use survey of academic researchers in Japan, this study finds that research time decreases over the life cycle. The decrease in total hours worked and the increase in time spent on administrative tasks explain the decrease in research time. We also show that the decrease...