This paper analyzes the setting of national patent policies in the global economy. In the standard model with free … induce individual countries to select patent strengths that are weaker than is optimal from a global perspective. The paper … considerations in setting patent policies. The first two features (trade barriers interacting with firm heterogeneity) tend to reduce …

in knowledge spillovers. Drawing on the NBER Patent Citations Database, we examine patent citations data at metropolitan … level within the U.S. and the 38 largest patent-cited countries outside the U.S. We present 3 key findings: First, we find … of cited patent, which implies that new knowledge faces the largest barriers to diffusion. However, over time, border and …