Testing endogeneity of <i>Mutuelles</i> with two-stage residual inclusion method.

Abbreviations: CI: confidence interval. *: statistically significant at the 0.05 level. **: statistically significant at the 0.01 level.缩写说明：CI：置信区间（confidence interval）。*：在0.05显著性水平下具有统计学意义。**：在0.01显著性水平下具有统计学意义。