Krugman predicted behavioral finance would move from periphery to center of economics.

Evidence

“What’s probably going to happen now—in fact, it’s already happening—is that flaws-and-frictions economics will move from the periphery of economic analysis to its center. There’s a fairly well developed example of the kind of economics I have in mind: the school of thought known as behavioral finance” (Krugman, “How Did Economics”). — Philip Mirowski, Never Let a Serious Crisis Go to Waste, 2204