(1)

(2)

(3)

(4)

Ols No Ln RD

Ols With Ln RD

Tsls

Liml

Ln CM

0.853^***

0.738^***

0.644^***

0.636^***

(0.0121)

(0.0275)

(0.0367)

(0.0384)

Ln ET

0.124^***

0.101^***

0.0825^***

0.0808^***

(0.0175)

(0.0181)

(0.0212)

(0.0216)

Ln RD

0.0920^***

0.168^***

0.175^***

(0.0192)

(0.0282)

(0.0298)

_cons

1.321^***

1.179^***

1.061^***

1.050^***

(0.0694)

(0.0766)

(0.0834)

(0.0847)

N

260

260

260

260

R²

0.982

0.984

0.983

0.983