(1) POLS

(2) RE

(3) FE

ln ( Y i Y j )

0.865***

0.629***

0.608***

(23.71)

(19.72)

(18.47)

ln D i j

0.639

0.132

(1.60)

(0.11)

_cons

−26.751***

−12.819

−10.770***

(−6.20)

(−1.18)

(−8.35)

N

408

408

408

R2

0.592

0.484

Number of id

43

43