This paper constructs an equilibrium model with consumer-producers, ec
onomies of specialization, and transaction costs. The comparative stat
ics of equilibrium can be used to predict several concurrent phenomena
associated with an industrialization process: an increase in producti
vity, an increase in trade dependence, increases in the division of la
bor and specialization, the emergence of new producer goods at a layer
of the hierarchy of goods, and an increase in the number of layers of
the hierarchy, increases in the diversity of the economic structure a
nd in the degree of integration of the economy, and an increase in cap
ital goods. (C) 1995 Academic Press, Inc.