Using data on academic citations, career and educational histories of mathematicians, and disaggregated distance data for the world's top 1000 math departments, we study how geography and ties affect knowledge flows among scholars. The ties we consider are coauthorship, past colocation,...

Using data on academic citations, career and educational histories of mathematicians, and disaggregated distance data for the world's top 1000 math departments, we study how geography and ties affect knowledge flows among scholars. The ties we consider are coauthorship, past colocation,...

This note contributes to the Coase Theorem. The Coasian interaction between two producers is represented, according to a statement of Coase, as a straight problem of constrained maximization of the value of production. This formulation allows showing that the validity of the Coase's theorem for...

The presence of localized industrial aggregation, also from the viewpoint of regional and country growth theories, can be regarded as a potential competitive advantage for regions or nations. While there is an abundance of qualitative analysis of the clustering of single industries and the way...