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Working Paper
Bounded Learning from Incumbent Firms
Social learning plays an important role in models of productivity dispersion and long-run growth. In economies with a continuum of producers and unbounded productivity distributions, social learning can sometimes leave long-run growth rates completely indeterminate. This paper modifies a model in which potential entrants attempt to imitate randomly selected incumbent firms by introducing an upper bound on how much entrants can learn from incumbents. When this upper bound is taken to infinity, a unique long-run growth rate emerges, even though the economy without upper bound has an unbounded ...
Report
Germs, Social Networks, and Growth
Does the pattern of social connections between individuals matter for macroeconomic outcomes? If so, where do these differences come from and how large are their effects? Using network analysis tools, we explore how different social network structures affect technology diffusion and thereby a country's rate of growth. The correlation between high-diffusion networks and income is strongly positive. But when we use a model to isolate the effect of a change in social networks, the effect can be positive, negative, or zero. The reason is that networks diffuse ideas and disease. Low-diffusion ...
Working Paper
International Technology Licensing, Intellectual Property Rights, and Tax Havens
This paper investigates the determinants of international technology licensing using data for 61 countries during 1995-2012. A multi-country model of innovation and diffusion with international technology licensing yields a structural gravity equation for royalty payments as a function of fundamentals. The gravity equation is estimated using nonlinear methods. The model’s fundamentals account for 45% of the variation in royalty payments. Other factors such as imperfect IPR protection and tax havens account for a substantial fraction of the unexplained variation. A back-of-the-envelope ...
Working Paper
International Technology Licensing, Intellectual Property Rights, and Tax Havens
This paper investigates the determinants of international technology licensing using data for 41 countries during 1996-2012. A multi-country model of innovation and international technology licensing yields a dynamic structural gravity equation for royalty payments as a function of fundamentals, including: (i) imperfect intellectual property protection and (ii) tax havens. The gravity equation is estimated using nonlinear methods. The model’s fundamentals account for 56% of the variation in royalty payments. Counterfactual analysis sheds light on the role of intellectual property rights ...
Working Paper
What Drives International technology Diffusion? A Gravity Approach
We derive a theory-based gravity-type equation that determines the main drivers of international technology diffusion under perfect enforcement of intellectual property rights. We estimate the gravity equation using bilateral royalty payments data for a sample of 53 countries and the period 1995-2012 to infer the amount of technology diffusion predicted by the model. We then analyze differences between the model and the data, and find that they are mainly driven by characteristics of the importing-technology country that are not captured by the model. We explore the role of three channels: ...
Working Paper
International technology Diffusion: A Gravity Approach
We adapt gravity methods from the empirical trade literature to study international technology diffusion in a novel way. First, we derive a theory-based gravity-type equation that describes the main fundamentals of international technology diffusion under perfect enforcement of intellectual property rights (IPR). We then estimate the gravity equation using bilateral royalty payments data—for a sample of 53 countries and the period 1995-2012—to infer the amount of technology diffusion predicted by the gravity model. Differences between the model and the data are mainly driven by ...
Working Paper
International technology Diffusion: A Gravity Approach
This paper investigates, empirically, the determinants of international technology diffusion. To do that, I set up a multi-country model of innovation and diffusion with perfect enforcement of intellectual property rights (IPR). The model yields a gravity equation for bilateral royalty payments that is estimated using methods from empirical trade. I investigate discrepancies between model’s predictions and observed royalty payments to identify the role of fundamentals vs. other factors such as imperfect IPR protection. Fundamentals account for most of the variation in royalty payments, ...
Working Paper
International technology Diffusion: A Gravity Approach
This paper investigates, empirically, the determinants of international technology diffusion using data on technology licensing fees for 61 countries during 1995-2012. A multi-country model of innovation and diffusion yields a gravity equation for bilateral royalty payments as a function of economic fundamentals. The gravity equation is estimated using nonlinear methods. I then investigate discrepancies between the model's predictions and observed royalty payments to identify the role of fundamentals vs. other factors such as imperfect IPR protection, the production structure and tax ...