The labour markets in the developed countries have experienced two fundamental changes in recent years. Firstly, high-skilled workers have gained at the expense of low-skilled workers, which manifests itself in a rising skill premium and/or a rising disparity in the unemployment rates of these...

The Heckscher-Ohlin model with arbitrary number of goods, factors and countries (consumers) and no restrictions on factor trading is shown to be equivalent to an exchange model whose goods are the productive factors while consumer's indirect demands for factors are derived from their actual...