This enables us to prepare import-export matrices which indicate the origin and destination of commodities for nineteen, two-digit SIC industries.The empirical results of testing the two models are quite dramatic. The G-F model is a ... DE Lewis - 《Annals of Regional Science》 被引量: 8...
aControl variables include year, country, and industry dummies to account for overall [translate] aclasses using Standard Industrial Classification (SIC) codes. More specifically, firms [translate] aexpanded to the two-digit level, bringing more detail into the categorization (e.g., [translate] ...