During the past decade, social mechanisms and mechanism-based ex- planations have received considerable attention in the social sciences as well as in the philosophy of science. This article critically reviews the most important philosophical and social science contributions to the mechanism approach. The first part discusses the idea of mechanism- based explanation from the point of view of philosophy of science and relates it to causation and to the covering-law account of explanation. The second part focuses on how the idea (...) of mechanisms has been used in the social sciences. The final part discusses recent developments in analytical sociology, covering the nature of sociological explananda, the role of theory of action in mechanism-based explanations, Merton’s idea of middle-range theory, and the role of agent-based simulations in the development of mechanism-based explanations. (shrink)

This article assesses the value of Karl Popper's situational analysis for contem porary sociology We maintain that this element of Popper's social science methodology has been largely neglected by sociologists and suggest that this is because it is borrowed from economics. As such, situational analysis has much in common with recent attempts to introduce rational choice in sociology. Our main question is this: What is the contribution of situational analysis to the current debate about rational choice in sociology? Our answer (...) is that Popper has little to add to this debate. His formulation of situational analysis is too general and too vague to be much of a guide to research. Among other things, situational analysis fails to pay due attention to interests and to social interaction in the explanation of social phenomena. On the positive side, we notice that Popper does include social institutions as the most important element in individuals' situations. (shrink)