关键词: 贸易障碍, 市场分割, 三元边际, 企业异质性

Abstract: The change of export trade structure of China′s food processing industry is related to the balance of agricultural foreign trade and the optimization and upgrading of agricultural industrial structure.The current situation analysis shows that the export market share of China′s food processing industry is relatively stable. The results of the ternary marginal analysis show that the extensive margin and the price index margin tend to increase, and the marginal contribution of the quantitative index is declining. The behavior of China′s food processing industry to win by quantity is not obvious.From quantity driven to price driven, the segmentation industry changed from extensive margin and intensive margin in the early stage to quantitative index in the medium term, and the contribution of price index was prominent in the later stage.Market segmentation and geographical distance have a significantly negative impact on the export of meat, fish, vegetable and oil industry; geographical distance has a significantly positive impact on the export of other food manufacturing industries and beverage industries; the degree of trade freedom of export destination has a significantly negative impact on the beverage industry; the impact of relative trade barriers on the market share of segmented industries has an interactive effect.Extensive margin, price index and quantity index influence each other. And the direction and degree of their influence depends on the subdivided industries, and the similar characteristics are shown in the impact of trade barriers and relative trade barriers on them. The change of export trade structure of food processing industry conforms to the needs of China′s economic transformation and upgrading.

Key words: trade barriers, market segmentation, ternary margin, enterprise heterogeneity