Many discussions of auto company economics include the assertion that SUVs and pickup trucks are more profitable than small cars, and so a shift from the former to the latter – as discussed by Felix Salmon, for example – will not be good for the auto companies, particularly GM and Chrysler (since they are in the news these days). I accept that as a historical statement, but I don’t understand why that is the case.
Textbook micro tells you that price equals marginal cost, so the gross margin on every product is zero; that’s clearly no help here. Profit margins should be higher in product segments with less competition, but basically every manufacturer makes a small, midsize, and large SUV, so I don’t think that’s the explanation.