This paper begins by examining the unresolved issues identified in an
earlier analysis of the literature. It then sets out developments in t
heory, measurement, empirical analysis and policy. The progress made o
n each of these fronts is assessed and remaining unresolved issues ide
ntified. The paper argues that the last decade has seen very considera
ble progress in the measurement of intra-industry trade and in the way
the empirical investigations are conducted. It also argues that on th
e modelling front considerable progress has been made in incorporating
spatial and growth dimensions into the paradigm.