The theory of international trade is one of the oldest subfields of economics. This chapter provides an overview of the present state of positive trade theory, concentrating on developments, at the same time it draws attention to the continuity in the development of the subject. It discusses the...

We examine conditions under which a low cost vertically integrated manufacturer has an incentive to export an intermediate product to its higher cost (vertically integrated) rival rather than to vertically foreclose, fully cutting off supplies. The nature of supply conditions in the importing...

A domestic firm is partially dependent on a foreign vertically integrated supplier for a key intermediate product when both firms are Cournot competitors in the market for the final product. The foreign supplier generally charges its domestic rival a price for the input that exceeds the...