We perform convergence tests on the U.S. states for per capita income from 1930 to 2009. Cross-sectional tests support overall σ-convergence and β-convergence but may not hold true for the last three ...
一些您可能无法访问的结果已被隐去。
显示无法访问的结果一些您可能无法访问的结果已被隐去。
显示无法访问的结果