The Gelos and Roldos study covers three transition economies (the Czech Republic, Hungary and Poland) in
period 1994 to 1999. For the transition economies, the estimated values of the H statistics lie between the values
of one (perfect competition) and zero (monopoly); although, in the case of Hungary the H-statistic is sufficiently
close to one that the hypothesis of perfect competition cannot be rejected. This study finds that the competitive
conditions remain broadly stable between two sub-periods, 1994 to 1996 and 1997 to 1999.