Dependent variable

Independent

Variables

(6)

t-statistic of

the estimated User-cost

elasticity

(7)

t-statistic of

the estimated User-cost

elasticity

(8)

t-statistic of

the estimated User-cost

elasticity

(9)

t-statistic of

the estimated User-cost

elasticity

(10)

t-statistic of

the estimated User-cost

elasticity

Constant

3.7729***

(0.9659)

1.6716

(2.3065)

4.3486

(2.8528)

5.1664*

(3.0083)

4.348503

(3.0717)

TD: Type of data

1.2508

(0.7687)

1.7318**

(0.8527)

2.6910***

(0.8584)

2.5008***

(0.8321)

2.4634***

(0.8286)

DSEST: Data structure and estimation methods

0.1272

(0.7436)

0.5116

(0.7790)

0.3012

(0.8823)

USNOUS: US or not US country

1.5054*

(0.8186)

−0.5128

(0.8709)

0.2099

(0.9113)

8.1199***

(1.8664)

8.3998***

(1.8342)

TAUX: Rate of tax credit

1.4389**

(0.6299)

−1.5314

(0.8757)

0.0910

(0.6996)

2.4308***

(0.7301)

2.4726***

(0.7298)

TDY: includes time dummy

2.9321

(2.2786)

5.3515*

(2.7827)

4.4497*

(2.5991)

−4.6433**

(2.3526)

NAUT: Number of authors

−2.3716***

(0.6341)

−2.9901

(0.6588)

−2.7701

(0.7050)

−2.3131***

(0.8890)

−2.4377***

(0.8933)

IDUM: Industry dummy

0.3846

(0.4991)

0.5103

(0.4833)

HTD: High-tech subsamples firms

8.3770***

(1.4195)

7.3529***

(1.4674)

6.9696***

(1.4889)

5.3511***

(1.4433)

5.1370***

(1.4534)

SME: SME-dummy

−0.8039

(0.9620)

−1.0042

(0.9935)

−0.5234

(1.0239)

−0.1513

(0.9643)

−0.2766

(0.9701)

LF: Large firms dummy

1.3965*

(0.8091)

1.2790

(0.8142)

0.7969

(0.9214)

0.7905

(0.8216)

0.8453

(0.8175)

HM: Highmarketcomp.-Dummy

6.3837***

(1.0301)

6.0315***

(1.0657)

7.1173***

(1.0862)

4.8731***

(1.2892)

4.0707***

(1.5078)

MS: Market

size dummy

−17.3173***

(1.4522)

−16.0271***

(1.5044)

−16.745***

(1.5172)

−17.5333***

(1.9957)

−17.595***

(1.9927)

LABOUR: Tax price of Labour related to RD

4.9303**

(2.4003)

8.1922***

(2.4846)

9.1584***

(2.6157)