The effects of the speed of international factor markets integration a
re studied within a general equilibrium, two country model. It is show
n that even in the absence of economic frictions there can be no theor
etical presumption regarding the ''optimal'' speed of integration. The
paper identifies plausible conditions under which a precipitous pace
leads to permanently lower and a piecemeal to permanently higher level
s of income in the integrated economy. The analysis offers a justifica
tion based on long term economic considerations for piecemeal European
Community integration practices such as transition periods, admission
s phasing out, and for the precipitous German unification.