Foreign investment and migration: analytics and extensions of the basic model.

"This paper provides a unified approach to the basic model of international factor mobility. The use of new graphical techniques complements the algebraic exposition to underscore the persistence of the Ramaswami effect which pushes an active, home country toward a near 'buy-out' of the foreign country's internationally mobile factors of production. By generalizing the Ramaswami function, which identifies the gains associated with moving to near buy-out, we are able to explore the forces at work that mitigate such a strategy and lead to situations in which only a partial buy-out, or even no acquisition of foreign factors is optimal. These features are developed in a context in which (i) technologies differ between countries or (ii) there exists a third, immobile factor of production."