This article uses both new and published data on Mexico's foreign trade to
measure terms of trade and to investigate the relationship between trade an
d the early growth of domestic industry. This analysis yields five conclusi
ons: (1) Mexican terms of trade declined, largely due to the dramatic fall
in the price of silver; (2) the growing diversity of Mexican exports signif
icantly cushioned the short-term impact of silver depreciation; (I) declini
ng terms of trade did not characterise the entire era, but instead were con
centrated in two periods: 1891-97 and 1912-21; (4) although net barter term
s of trade declined, Mexico's capacity to import-measured by the income ter
ms of trade-improved markedly, and (5) this proved absolutely crucial in fi
nancing the concurrent process of incipient import-substituting industriali
sation. In other words, the Porfiriato witnessed a development process in w
hich trade growth and the spread of domestic manufacturing were highly comp
lementary. Without the former, industrialisation would have been severely h
andicapped.