>It is incredible that Bertrand with this review made his way in the >history of economic thought. The model that we call nowadays the Bertrand >model was formalised by Edgeworth. Only two, rather vague sentences in his >review can legitimate a claim to his fame. To this regard, we would like to add the following: we found out that, before Edgeworth, the model was indeed formalized by Launhardt. You might want to have a look at our working paper, which is downloadable at http://www.dse.unibo.it/wp/413.pdf Comments most welcome. Yours, Luca Lambertini and Manuela Mosca