Explanation of new trade theory terms

To be precise, it should be a new and new trade theory, yes, it is a new and new trade theory.

New-new trade theory refers to the theory of heterogeneous enterprise trade model (HFTM) and enterprise endogenous boundary model, which shift the research scope of international trade from the traditional trade theory to the study of inter-industry trade between different enterprises in the same industry. The new and new trade theory explains the phenomenon of international trade and international investment more from the enterprise level.

It is different from the traditional trade theory:

From the research scope, the traditional trade theory mainly studies inter-industry trade, the new trade theory mainly studies intra-industry trade under the condition of increasing scale and imperfect competition, and the new and new trade theory explains international trade and investment from the perspective of enterprise heterogeneity.