Answer: Intra-industry trade
Step-by-step explanation:
exchange of similar products belonging to the same industry. when the same types of goods are both imported and exported. Gains from intra-industry trade reflect economies of scale.
Intra-industry trade is less controversial than trade based on differences.
Krugman and Helman's theory of intra-industry trade → each country specializes in one product moving further down the cost curve and then trade with the other.