(1)

(2)

VARIABLES

rd

rd

did

0.478*

0.632**

(1.71)

(2.28)

size

0.888***

(6.36)

lev

−3.437***

(−4.11)

cashflow

3.170

(1.29)

roe

0.749

(0.62)

growth

0.296

(0.55)

tobinq

−0.054

(−0.58)

Constant

15.391***

−3.278

(102.37)

(−1.10)

Observations

1801

1801

R-squared

0.378

0.404

industry

YES

YES

year

YES

YES