In this paper, I consider the recent resurgence of "evolutionary economics"the idea that evolutionary theory can be very useful to push forward key debates in economics-and assess the extent to which it rests on a plausible foundation. To do this, I first distinguish two ways in which evolutionary theory can, in principle, be brought to bear on an economic problem-namely, evidentially and heuristically-and then apply this distinction to the three major hypotheses that evolutionary economists have come to defend: the implausibility of rational choice theory as an account of economic rationality, the idea that firms are autonomous economic agents, and the need for a more dynamic, less equilibrium-focused economic methodology. In each of these cases, I conclude negatively: the relevant evolutionary considerations neither suggest interesting and novel hypotheses to investigate further (the hallmark of heuristic devices) nor are backed up by the needed data to constitute genuine evidence. I end by distinguishing this criticism of evolutionary economics from others that have been put forward in the literature: in particular, I make clear that, unlike those of other critics, the arguments of this paper are based on epistemic-not structural-considerations and therefore leave more room for a plausible form of evolutionary economics to come about in the future. Keywords evolutionary economics, rational choice, theory of the firm, equilibrium analysis Article Schulz Philosophy of the Social Sciences 43 (1) economics" simply refers to the application of evolutionary theory to economic issues. For example, much of the recent work on cultural evolution can be applied to various economic questions (after all, economies are parts of human culture), and the same goes for work on cognitive and neural evolution (after all, economics has much to do with thought and decision making) (for more on the former, see, e.g., Boyd and Richerson 2005;Henrich et al. 2004;Skyrms 1996; for more on the latter, see, e.g., Camerer 2007; Glimcher, Dorris, and Bayer 2005). On this understanding of "evolutionary economics," no further theoretical commitments are made by the program: in particular, what, exactly, the upshot is of this application of evolutionary theory to economicswhat hypotheses it yields or supports-is being left open.Precisely this is different on the narrower understanding of the term, however: there, a specific set of economic doctrines is said to be supported by evolutionary considerations. 2 Most important among these doctrines are the following three (see also Vromen 2001; Hodgson 1999):1. Economic agents are only boundedly rational. 2. Firms are economic agents of their own. 3. Economies are dynamic, nonequilibrium systems and need to be analyzed as such.