A single specimen of a shrimp-like crustacean, Devonostenopus pennsylvaniensis, new genus and species is described from the Huntley Mountain Formation, which is Devonian–Carboniferous (Mississippian) in age. The specimen was collected in north-central Pennsylvania. Devonostenopus pennsylvaniensis is attributed to Stenopodidae. Co-occurrence of the specimen with pinnules of Archaeopteris halliana Goeppert, 1852, suggests that it is Devonian in age. Occurrence of a stenopodidean in the Devonian of North America is significant, as only three definitive decapods have been previously described from the Paleozoic and only two have been described from the Devonian. The earliest stenopodideans described to date are Cretaceous (Cenomanian and Santonian) in age. As such, Devonostenopus pennsylvaniensis extends the geologic range of Stenopodidea from Cretaceous to Late Devonian. Occurrence of a stenopodidean in the Devonian of North America, as well as the occurrence of the only two other known Devonian decapods in North America, suggests that Laurentia might have been a major area of endemism for Devonian decapods.

This paper discusses the Sonnenschein–Mantel–Debreu (SMD) theorems in general equilibrium theory. It argues that the SMD results were related to the previous literature on the integrability of demand. The integrability question involved rationalizing individual demand functions, and the SMD theorems asked the same question about aggregate (market) excess demand functions. The paper’s two goals are to demonstrate how the SMD results followed naturally from the earlier work on integrability, and to point out that the profession’s reception was quite different; the integrability results were considered a success story, while the SMD results were quite negative.

Philip Kitcher's new book is very ambitious in scope, more ambitious, certainly, than any of his previous books. Unlike Kitcher's Abusing Science: The Case against Creationism (1982), this is not a book that focusses on just one single issue in contemporary science or educational policy; nor is it, like his The Nature of Mathematical Knowledge (1983) and Vaulting Ambition: Sociobiology and the Quest for Human Nature (1985), a book that emphasizes just one relatively narrow philosophical topic. The Advancement of Science presents a complete, and quite general, position within the philosophy of natural science. Its purpose is much closer to Popper's The Logic of Scientific Discovery (1959) or even to Nagel's The Structure of Science (1961) than it is to any of Kitcher's earlier books. Kitcher starts off with an explicit epistemology, moves to a “goal” for science based on that epistemology, and then uses this epistemic goal as the target for the various methodological and social or institutional strategies that he offers.

In Stabilizing Dynamics (1991) Roy Weintraub provides a history of stability theory from the work of Hicks and Samuelson in the late 1930s to the Gale and Scarf counterexamples in the 1960s. Unlike his earlier work in the history of general equilibrium theory (1979, 1985, 1988) this recent contribution is not an attempt to fit the Walrasian program into the narrow framework of some particular philosophy of natural science (such as Lakatos's methodology of scientific research programs). Rather, the theme in Stabilizing Dynamics is broadly social constructivist. Simply put, the constructivist view of science is “that scientific knowledge itself is constructed socially, in communities of scientists: Knowledge is constructed, not found” (p. 9).

HES Presidential addresses often attempt to answer a substantive question (or number of related questions) in the history of economic thought. The answers provided are not “answers” in the sense that one finds an answer to a simple numerical problem; rather they are historical narratives, stories, that bring the listener/reader to a new, and hopefully deeper, understanding of a particular author, piece of economic literature, or episode in the history of economic thought.