This paper focuses on one possible explanation for the empirical evide
nce of (a) income convergence among the world's poorest countries and
among its wealthiest countries, and (b) income divergence among most o
f the remaining countries. The model incorporates the assumption of su
bsistence consumption into the neoclassical exogenous growth model, yi
elding outcomes that are consistent with the convergence-divergence em
pirical evidence. While subsistence consumption can lead to negative s
aving and disaccumulation of capital, it can also coincide with positi
ve saving and accumulation of capital. The model predicts that the poo
rer the country, the lower its saving rate, a result that also appears
to be borne out by the evidence provided here. (C) 1998 Elsevier Scie
nce B.V.