A positive relationship between information technology (IT), productivity, and growth has been established at the aggregate level. What remain unclear are the mechanisms through which the effect operates at the level of specific businesses. Statistical agencies have developed indicators of...

We present in this article a model of freight flows between eight regions in Canada, and for 64 categories of goods. The model works in two stages. First, regressions are made of observed flows on some socio-economical variables, such as transportation costs. We then get prior flows, which can...