Conditional policies in general equilibrium

"Obtaining lower generalized system of preferences (GSP) tariffs requires meeting costly Rules of Origin (ROOs). Growing coffee in the shade is more costly, but yields a price premium. This paper analyzes the effects of such restrictions in a general equilibrium setting and shows that such policies may have unanticipated effects. It is shown that in a world with capital mobility, the GSP could result in capital outflows rather than inflows and consumer preferences for shade grown coffee end up hurting labor in developing countries. Even small subsidies that are contingent on the use of domestic intermediates can result in specialization in the targeted good. Value added contingent policies can easily lead to multiple equilibria despite the absence of externalities or market imperfections"--National Bureau of Economic Research web site.