Is It What We Do or How We Do It? New Evidence on Agglomeration Economies and Metropolitan Growth
利用1970-1999年美国都市区数据，分解收入增长来源，发现相对增长比产业构成更重要，且相对增长效应与本地化和城市化经济相关。
This paper uses data on U.S. metropolitan areas from 1970 to 1999 to examine the extent to which recent increases in earnings are attributable to agglomeration economies. We decompose the total change in earnings over the 1970–1999 period into components attributable to changes in relative growth, industry mix and interaction effects. We find strong evidence that relative growth matters more than industry mix. In addition, we find that relative growth effects are related to both localization and urbanization economies.