Correspondence: The Angel is in the Big Picture: A Response to Lemley

An invention within close reach of multiple inventors differs from an invention within distant reach of a lone inventor. The differences between these two archetypes of invention—“reinventables” and “singletons”—remain unexploited under current U.S. law. Should we reform the law to exploit the differences? Mark Lemley and I agree that we should. To date, those economists who have closely examined the issue concur.