JEL Classification: O3

This paper reexamines the Baumol-Wolff (1988) hypothesis that there exists an exclusive international Convergence Club of rich nations whose members will move nearer each other with the passage of time. We argue that the Baumol-Wolff analysis does not really justify...

The use of patent citations as a measure of patent "quality" increased dramatically in recent years. I estimate the hazard of patent citation, and find evidence of unobserved heterogeneity. Hazard estimation provides a means to separate patent quality from citation...