From the Angle of international trade theory, information economics and new system economics, the paper analyzes the conditions of relative rent existing in supply chain.
分别从国际贸易理论，信息经济学和新制度经济学的角度对供应链中关系性租金存在的条件作了分析。
2
The influence of melt polycondensation and solvent refluxing methods of lactide polymerization and chain extension agents on relative molecular weight of polylactide was studied.