Spillover of knowledge is considered to be an important cause of agglomeration of inventive activity. Many studies argue that knowledge spillovers are localized based on the observation that patents tend to cite nearby patents disproportionately. Specifically, patent citations are interpreted as...

Limited liability is a key attribute of the corporate form and one of the most important institutional innovations of the nineteenth century. However, when the owner of a corporation is another corporation as in many corporate groups, an important justification for limited liability--to protect...

Limited liability is a key attribute of the corporate form and one of the most important institutional innovations of the nineteenth century. However, when the owner of a corporation is another corporation as in many corporate groups, an important justification for limited liability—to protect...

A defiining feature of modern economic growth is the systematic application of science to advance technology. However, despite sustained progress in scientific knowledge, recent productivity growth in the U.S. has been disappointing. We review major changes in the American innovation ecosystem...

Corporate science in America emerged in the interwar period, as some companies set up state-of-the-art corporate laboratories, hired trained scientists, and embarked upon basic research of the kind we would associate today with academic institutions. Using a newly assembled dataset on U.S....