Lnpatent1

1.987***

(0.192)

Lnpatent2

0.387***

(0.683)

lngd

−3.899

(0.824)

in

0.116***

(0.413)

re

0.407***

(0.555)

gdp

0.134***

(0.238)

constant

60.820**

(14.719)

observations

450