Table 6: Price margin estimates-model in differences.

Variables(1)
Ratio 2
OLS
(2)
Ratio 2
FE
(3)
Ratio 2
RE
(4)
Ratio 3
OLS
(5)
Ratio 3
FE
(6)
Ratio 3
RE
(7)
Ratio 4
OLS
(8)
Ratio 4
FE
(9)
Ratio 4
RE

L. traiff ratio−1.8364*0.0982−1.29850.51350.14030.52700.12110.22240.2347
(0.8842)(2.0520)(1.0787)(0.5255)(1.3303)(0.5460)(0.6598)(1.4369)(0.6027)
L. market share2.2838***1.5857*1.9810***0.36940.9140*0.6267*0.6510*0.61800.7496*
(0.5181)(0.6754)(0.5139)(0.2347)(0.4379)(0.2816)(0.3154)(0.4730)(0.3094)
Constant0.6345***0.6415***0.5535**−0.3863***−0.4528***−0.4514***−0.3130**−0.3132**−0.3525***
(0.1780)(0.1590)(0.1716)(0.0929)(0.1031)(0.0859)(0.0979)(0.1113)(0.0948)

Observations224224224224224224224224224
-squared0.19270.03110.01710.02480.03670.0100
within0.03110.02940.02480.02360.009970.00996
between0.1980.2260.02900.03850.09480.0946
overall0.1690.1920.01110.01590.03650.0366

Robust standard errors in parentheses.
*** , ** , * .