2008-2012

2013-2017

Lnpatent1

1.396***

(0.742)

1.048***

(0.315)

Lnpatent2

0.309***

(0.662)

0.315***

(0.125)

lngd

−0.317

(0.258)

−0.206

(0.235)

in

−1.799

(0.753)

1.163***

(0.364)

re

0.405

(0.455)

−0.680

(0.287)

gdp

0.0304

(0.229)

0.046

(4.570)

constant

16.007

(24.564)

−16.828***

(5.999)

observations

225

225