This article aims to analyze the effects of trade policies on the pattern o
f regional inequalities within a country. It is inspired, firstly, by the d
ebate concerning the role of protectionist policies in the development of a
pattern of striking regional inequalities during the Spanish industrializa
tion process and, secondly, by current evidence of an increase in these ine
qualities following Spain's entry in the EU, in 1986. We employ an economic
geography model comprising three regions: two domestic and one external. L
abor mobility is permitted between the domestic regions but not with the ex
ternal region. The model shows that trade liberalization increases regional
inequalities. JEL classification: F12, F15, R12.