Several types of constraints must be satisfied by schedules of real world sports leagues, e. g. stadium unavailability … constraints are considered as 'soft' ones. There are various models appropriately describing the environment of real sport leagues … here a model which satisfies the demands of many sports leagues. We solve our model by a method which consists in …

We analyze the impact of exercising sports during childhood and adolescence on educational attainment. The theoretical … Socio-Economic Panel (GSOEP), we apply generalized ordered probit models to estimate the effect of participation in sport … into sport, we find strong evidence that the effect of sport on educational attainment is statistically significant and …