变量

TSLS滞后一期工具变量

TSLS滞后二期工具变量

$\ln tf$

−0.85651^** (0.039)

−0.50134^** (0.011)

$\ln pgdp$

0.711173^*** (0.000)

0.51155^** (0.013)

$d\ln tar$

−0.05129^** (0.028)

−0.15549^** (0.037)

$\ln size$

−0.68053^*** (0.000)

−0.65819^*** (0.000)

$\ln gini$

1.22489^** (0.048)

0.7746^** (0.039)

$cons$

−5.96^** (0.011)

−1.1845^** (0.036)

$R^2$

0.1973

0.2443