We develop theoretical underpinnings of pairwise random matching processes. We formalize the mechanics of matching, and study the links between properties of the different processes and trade frictions. A particular emphasis is placed on providing a mapping between matching technologies and...

We endogenize the trade mechanism in a search economy with many homogenous sellers and many heterogenous buyers of unobservable type. We study how heterogeneity and the traders' continuation values - which are endogenous - influence the sellers' choice of trade mechanism. Sellers trade off the...