Ricardo and Haberler: an essay on the evolution of the economic thought based on the four magic numbers in the international trade theory

The Ricardian comparative advantage is one key cornerstone in the international trade theory. There no shortage of textbooks supposing that Ricardo used solely labour as a factor production. This approach originates with Haberler 1930s, who wrote Ricardo’s theory robust, but not labor-cost doctrine, which, assumed, applied. paper summarizes why Haberler’s perspective emerged, essaying an explanation his way interpreting Ricardo. To do this, we considered new research on Ricardo, whose facets to be known seem renew over time and never end.