This paper develops a model of successive oligopolies with endogenous market entry, allowing for varying degrees of product differentiation and entry costs in both markets. Our analysis shows that the downstream conditions dominate the overall profitability of the two-tier structure while the...

This paper develops a model of successive oligopolies with endogenous market entry, allowing for varying degrees of product differentiation and entry costs in both markets. Our analysis shows that the downstream conditions dominate the overall profitability of the two-tier structure while the...

Intro -- Contents -- Series Foreword -- Preface -- 1 Introduction -- 2 Consumer Benefits from Import Variety -- 3 Producer Benefits from Export Variety -- 4 The Extensive Margin of Trade and Country Productivity -- 5 Product Variety and the Measurement of Real GDP -- 6 Conclusions -- Notes --...