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. 2024 Jan 12;12:1331565. doi: 10.3389/fpubh.2024.1331565

Table 4.

Robustness test.

(1) (2) (3) (4) (5) (6)
CE CE CE CE
L.CE 1.058*** (0.009) 0.934*** (0.037)
DE 0.574*** (1.231) 0.654*** (0.126) 0.043*** (0.014) 0.029*** (0.002) 0.771*** (0.149) 0.369*** (0.093)
Controls Yes Yes Yes Yes Yes Yes
Year F. E. Yes Yes Yes Yes
Province F. E. Yes Yes Yes Yes
AR(1) 0.035 0.035
AR(2) 0.233 0.244
Sargan test 0.453 0.255
Observations 300 300 270 240 260 260
R2 0.983 0.313 0.984 0.992

Standard errors are shown in small parentheses, *, **, and *** stand for statistical significance at the 0.1, 0.05, and 0.01 significance levels, respectively.