	(1) POLS	(2) RE	(3) FE
$\ln (Y_{i} Y_{j})$	0.865^***	0.629^***	0.608^***
$\ln (Y_{i} Y_{j})$	(23.71)	(19.72)	(18.47)
$\ln D_{i j}$	0.639	0.132
$\ln D_{i j}$	(1.60)	(0.11)
_cons	−26.751^***	−12.819	−10.770^***
_cons	(−6.20)	(−1.18)	(−8.35)
N	408	408	408
R²	0.592		0.484
Number of id		43	43