To analyze the effect of vertical technology transfer on industrial develop
ment in lesser developed countries (LDCs), we develop a model in which the
technology transferred to an LDC supplier by a developed country (DC) impor
ter can diffuse to other LDC firms. Surprisingly, even if such diffusion in
the LDC market leads to entry into the DC market, it can benefit both the
initial DC importer and its initial LDC supplier by reducing the double mar
ginalization problem. This effect does not depend upon whether firms compet
e in prices or quantities and exists even when the number of entrants into
each market is endogenously determined. (C) 2001 Elsevier Science B.V. All
rights reserved.