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...

Do large firms produce more valuable inventions, and if so, why? After confirming that large firms indeed produce more valuable inventions, we consider two possible sources: a superior ability to invent, or a superior ability to extract value from their inventions. We develop a simple model that...

Scientific knowledge is believed to be the wellspring of innovation. Historically, firms have also invested in research to fuel innovation and growth. In this paper, we document a shift away from scientific research by large corporations between 1980 and 2007. We find that publications by...