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In the literature, theory and empirical evidence on the nexus of political freedom, economic freedom, and economic growth are mixed. In this paper, we test the hypothesis that the effect of political freedom on promoting economic growth is realized and detectable at later stages of social and economic development. Using panel data for a sample of 104 countries between 1970 and 2003, we find strong support for our hypothesis. While economic freedom has greater effects on income convergence in the OECD countries, political freedom clearly promotes the convergence among those OECD countries. Adapted from the source document.

Abstract.  This study is aimed at providing a more accurate estimate of the returns to schooling in China by controlling for unobserved ability heterogeneity and measurement errors. We identify a unique instrument to correct for the omitted ability bias. We find that the attenuation bias caused by measurement error dominates the omitted ability bias in the OLS estimation. Based on the GMM estimation, for young workers in China, the return to schooling is 15.0% overall and 16.9% for women.