This paper analyzes peer effects among university scientists. Specifically, it investigates whether the number of peers and their average quality affects the productivity of researchers in physics, chemistry, and mathematics. The usual endogeneity problems related to estimating peer effects are...

English abstract: This book is the first comprehensive history of the oil industry in Germany between 1859 and 1974. Although the German area was one of the first to discover oil (at about the same time as the United States), the country proved to have very little petroleum under its soil, in...