» For the island shared by Finland and Sweden, see Märket. In economics, a market is a social structure that has emerged more or less spontaneously or has been constructed deliberately by human interaction to enable the exchange of rights (cf. ownership) of services and goods. Markets enable services, firms and products to be evaluated and priced. There are two roles in markets, buyers and sellers. The definition implies that at least three actors are needed for a market to exist; at lea… (More on Markets)