Table 2.

Regressions on mean prices

	(1) SYMM and SYMM_EXT	(2) 6SELLERS and 6SELLERS_EXT	(3) 6BUYERS and 6BUYERS_EXT
EXT (= 1)	− 0.06 (0.84)	0.23 (0.83)	− 1.10 (0.71)
PERIOD	0.07 (0.03)**	− 0.50 (0.04)***	0.33 (0.05)***
PERIOD*EXT	− 0.02 (0.11)	0.26 (0.10)***	− 0.04 (0.10)
Constant	10.76 (0.62)***	8.37 (0.60)***	14.48 (0.55)***
N	160	240	240

GLS panel regressions with clustered standard errors on market level. Dependent variable is the mean price in each period. Coefficients are reported. Robust standard errors are given in parenthesis

*,**,*** represent the 10%, 5% and the 1% significance levels