In search of scale effects in trade and growth
检验了基于动态规模报酬的贸易与增长理论，发现人均GDP增长率与理论预测的规模指标关系微弱，但制造业人均产出增长率与规模变量及产业内贸易显著相关。
We look for the scale effects predicted by some theories of trade and growth based on the dynamic returns to scale that arise from learning by doing, investment in human capital, or development of new products. We find little empirical evidence of a relation between the growth rate of GDP per capita and the measures of scale implied by the theory. Restricting attention to the manufacturing sector, however, we find a significant relation between the growth rate of output per worker and the relevant scale variables. We also find that growth rates are significantly related to measures of intra-industry trade.