This paper tests three explanations for Mexico's investment collapse i
n the early 1980s: the oil price decline, the termination of capital i
nflows, and debt-overhang/uncertainty effects, using previously ignore
d investment data on private sector industries. The data consistently
point to the importance of the rise in the relative price of investmen
t goods, driven in large part by falling world oil prices, but the dat
a also allow a role for the termination of capital inflows. However, a
fter controlling for these effects, the paper finds little evidence fo
r debt overhang effects, heightened uncertainty, or other commonly cit
ed explanations in the literature.