I was, of course, only saying something that critics of conventional theory had been saying for decades. Yet my point was not part of the mainstream of international economics. Why? Because it had never been expressed in nice models. The new monopolistic competition models gave me a tool to open cleanly what had previously been regarded as a can of worms. More important, however, I suddenly realized the remarkable extent to which the methodology of economics creates blind spots. We just don’t see what we can’t formalize. And the biggest blind spot of all has involved increasing returns. So there, right at hand, was my mission: to look at things from a slightly different angle, and in so doing to reveal the obvious, things that had been right under our noses all the time.
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