International trade in the presence of product differentiation, economies of scale and monopolistic competition : a Chamberlin-Heckscher-Ohlin approach /
Elhanan Helpman
- Stockholm : Institute for International Economic Studies (IIES) , 1980
- 46, [13]p. : ill. ; 28 cm.
- Seminar paper (University of Stockholm, Institute for International Economic Studies,) no. 157 .