This paper studies changes in diversification of firms and plants since the early 1970s in the Canadian manufacturing sector. It finds that there has been a general increase in specialization of both firms and plants. Firms have been continuously reducing the span of industries in which they...

Trade exerts generally favourable effects on the performance of domestic manufacturing industries in the dimensions of allocative and productive efficiency. This paper reviews theory and recent evidence on these linkages and also explore a third effect-on the turbulence of competitive conditions...