Methodology in theory, and practice, in economics textbooks

While methodology is not often seen as a core part of the economics curriculum in universities, a surprising number of economics textbooks have methodological discussions in them. An interesting question is just how far the textbook authors actually follow through on the methodology which they espouse. Fortunately, it is easy to test this in general, since many textbooks also have sections on behavioural economics. Insofar as the behavioural economics clashes with mainstream neoclassical economics, one can test how serious the textbook authors are about their methodological pronouncements.