Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Supply-restricting drug policy is inefficient from an economic point of view but is nevertheless widely used. This paper explains this phenomenon as individually rational behavior for local government. Because supply restriction gives addicts an incentive to migrate it has an external effect. This effect makes a policy of supply restrictions individually rational but leads to socially wasteful competition between local governments in a federal system. Copyright 1994 by Kluwer Academic Publishers