变量

(1)

(2)

(3)

(4)

lne

lne

lne

lne

covid

−0.1069^*

−0.1327^**

−0.1651^***

−0.1822^***

(0.0555)

(0.0552)

(0.0557)

(0.0559)

lnw

0.2076^***

0.1760^***

0.1840^***

0.1808^***

(0.0421)

(0.0423)

(0.0421)

(0.0419)

lninv

0.1314^***

0.1072^***

0.1087^***

0.1084^***

(0.0320)

(0.0322)

(0.0319)

(0.0318)