Match models with assumptions

MOdels:

Ricardian model

Heckscher-Ohlin model

Specific Factors (Ricardo-Viner)

A common assumption to all three models

Assumptions

A.Labor and capital are free to move between the two industries but not across countries

B.Only labor can move between industries

C.the marginal products of labor are constant because production does not include land or capital.

D.Constant or decreasing returns to trade