Does income have a non-linear impact on residents鈥� BMI? Re-examining the obesity Kuznets curve

Table 8 Heterogeneity analysis: age

Note: The results are based on 2SLS estimation. Standard errors clustered at the household level are reported in parentheses. ***, **, and * indicate significance at the 1%, 5%, and 10% levels, respectively. The empirical P-value is used to test the significance of the difference in adjustment coefficients between groups, obtained through 1000 bootstrap replications

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