We compare the change in ownership concentration in firms privatized through two different programs of mass privatization: the Czech voucher scheme and the Polish program of National Investment Funds. Despite important differences in ownership structure at the start of the process and in the...

In the present paper, we adopt the collective approach to consumer behavior - which supposes that each household member is characterized by his/her own preferences and that the decision process results in Pareto-efficient outcomes - and assume, in addition, that agents are egoistic and...

In many economic contexts, a given function can be disaggregated as a linear combination of gradients. Examples include the literature on the characterization of aggregate demand and excess demand, as initiated by Sonnenschein (1973ab), and the model of efficient household behaviour recently...

In a large range of political and economic situations, group formation is driven by two opposite forces : increasing returns to size and to coordination on the one hand, heterogeneity of preferences on the other. An important question is whether competitive pressures, such as described by free...