An explanation is provided for the evolution of segmented marketplaces in a pairwise exchange economy. Large traders operating in a pairwise exchange market prefer to meet other similar traders, because this enables them to trade their endowments in a smaller number of encounters. Large and...

There is scope and incentive for "stores" to endogenously arise in an exchange economy when agents possess different levels of bargaining power and coalition is costly. In the absence of stores, agents face a trading lottery where the expected outcome for an individual agent depends upon his...