In this paper we report on the most significant results from a statistical
analysis of the main properties of globular cluster blue straggler stars (BSS)
extracted from the HST snapshot database of photometrically homogeneous CMDs
(Piotto et al. 2002). The BSS relative frequency presents a significant
anticorrelation with the collisional rate and with the cluster total absolute
luminosity.Comment: 2 pages, 1 figure, A.S.P. Conf. Ser., in press in Vol. 296, 200