(1)

(2)

dig

−0.048^***

−0.029^**

(−3.064)

(−2.330)

dig²

0.048^**

0.031^*

(2.483)

(1.957)

dig*tb

0.002^***

0.002^**

(3.999)

(2.483)

dig²*tb

−0.004^*

−0.004^**

(−1.791)

(−2.247)

tb

0.002^**

0.000

(2.391)

(0.057)

egro

0.001^*

(2.004)

mar

0.001

(1.122)

gov

0.031

(1.048)

is

0.051

(1.333)

cul

0.021^***

(3.625)

road

−0.001^***

(−3.673)

labor

0.000

(1.388)

_cons

0.083^***

−0.049

(11.453)

(−1.011)

Year

Yes

Yes

Province

Yes

Yes

N

330

300

F

48.152

118.756

adj. R²

0.890

0.928