INTL 2200 Lecture Notes - Lecture 5: Infant Industry Argument, Monopolistic Competition, Imperfect Competition

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Fig 1. 1 shows that home and foreign have same ppf, and that trade between them will not be beneficial, but economies of scale say that trade is beneficial. Economies of scale, differentiate products / increasing returns -> intra-industry trade , trade in inputs as well as output. Inter-industry trade is between industries (agriculture to manufacturing and vice versa). We export wine, and we import wine; we export cars and we import cars. There are different car models and different types of wine. We must move to imperfect competition, as in monopolistic competition or oligopoly. They all have differentiated products canadian, sapporo, heineken. Therefore they can all coexist and produce each of their beers. It opens a lot of avenues that were not available in the h-o and ricardian theories. So to reiterate, countries with same ppf can both benefit as long as you consider economies of scale. In economies of scale, fig 1. 2 represents the average cost of x.

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