Dead poets' property—how does copyright influence price?

Copyrights create long‐lived intellectual property in goods ranging from science, literature, and music to news, film, and software. The economic effects of copyright, however, are difficult to identify in modern settings. This article exploits an unintended differential increase in copyright length under the UK Copyright Act of 1814—in favor of books by dead authors—to examine the effects of longer copyright terms on price. We find that a doubling in copyright length was associated with a substantial (roughly 50%) increase in the price of books. Additional years of copyright improved publishers' ability to practice intertemporal price discrimination.     

Patents, Thickets and the Financing of Early-Stage Firms: Evidence from the Software Industry

Legal changes in the patentability of software since the mid 1990s have resulted in a substantial increase in the number of patents on software inventions. We focus here on the impact of transactions costs associated with patent "thickets" on new entrants' interactions with the capital markets. Using data on the financing of entrants into 27 narrowly defined software markets, we show that start-up software companies operating in markets characterized by denser patent thickets saw their initial acquisition of VC funding delayed relative to firms in markets less affected by patents after the mid 1990s. The relationship between patent thickets and subsequent financing activity such as IPO or acquisition is more complex, but there is weak evidence that firms without patents became less likely to go public if they operated in a market characterized by patent thickets. Firms with patents are more likely to be funded or experience a liquidity event. However, the application for a patent appears to matter more than its grant.     

“Misfits,” “stars,” and immigrant entrepreneurship

Prior research has shown that immigrants are more likely than natives to become entrepreneurs, and that entrepreneurs are disproportionately drawn from the extremes of the ability distribution. Using a large panel of US residents with bachelors’ degrees in scientific fields, we ask whether higher rates of entrepreneurship among immigrants can be explained by their position on the ability spectrum and establish four new facts about science-based and immigrant entrepreneurship. First, in this sample, an immigrant entrepreneurship premium exists only in science-based entrepreneurship. Second, this premium persists after controlling for ability (measured by paid employment wage residuals.) Third, a U-shaped relationship between ability and entrepreneurship exists only in non-science entrepreneurship; for science entrepreneurship, the relationship is increasing. Finally, the immigrant premium in science entrepreneurship is largest among immigrants with non-US degrees and those from non-English-speaking or culturally dissimilar countries. Stated preferences for self-employment do not explain the immigrant premium. The results suggest that immigrants may on average have higher levels of unobservable skills related to entrepreneurship.     

How well do patent citations measure flows of technology? Evidence from French innovation surveys

Patent citation data are used in a growing body of economics and business research on technological diffusion. Until now, there exists little evidence on whether patent citations are a good measure of knowledge flows. Our paper assesses the legitimacy of using European patent citations as a measure of technology flows. It uses information from the Community Innovation Survey collected by the French Service des Statistiques Industrielles (SESSI), which contain firms’ responses to questions about their innovative activity. We show that patent citations are indeed related to firms’ statements about their acquisition and dispersion of new technology, but that the strength and statistical significance of this relationship varies across geographical regions and across channels of knowledge diffusion.