Ideas linked to rational choice theory started to appear frequently in the economics literature in the 1960s and 1970s, but the attention given to rationality widened to include commentators presenting far-reaching appraisals and critiques. The literature grew to a steady flow and spanned diverse areas of thought including socialist and `rational-choice Marxist' assessments, and other approaches including institutional, sociological, psychological, ethical, choice-theoretical, strategic, and game-theoretical treatments of rationality. This diversity of literature led to the creation of this volume. What does rationality mean? Was there some common core of meaning that held all of these seemingly disparate developments together, or were there discernable schools of thought with peculiarities that set them clearly apart from one another? The essays in this volume illustrate that diversity, and despite the variety of approaches there remains a common core of meaning that accommodates not so much a radically different set of concepts of rationality as a highly variegated array of methods and approaches to this subject. Contributors address topics of their choice on the concept of rationality in economics, and the selection of these contributors is meant to represent a variety of backgrounds and approaches.

Ideas linked to rational choice theory started to appear frequently in the economics literature in the 1960s and 1970s, but the attention given to rationality widened to include commentators presenting far-reaching appraisals and critiques. The literature grew to a steady flow and spanned diverse areas of thought including socialist and `rational-choice Marxist' assessments, and other approaches including institutional, sociological, psychological, ethical, choice-theoretical, strategic, and game-theoretical treatments of rationality. This diversity of literature led to the creation of this volume. What does rationality mean? Was there some common core of meaning that held all of these seemingly disparate developments together, or were there discernable schools of thought with peculiarities that set them clearly apart from one another? The essays in this volume illustrate that diversity, and despite the variety of approaches there remains a common core of meaning that accommodates not so much a radically different set of concepts of rationality as a highly variegated array of methods and approaches to this subject. Contributors address topics of their choice on the concept of rationality in economics, and the selection of these contributors is meant to represent a variety of backgrounds and approaches.

The economic crisis is also a crisis for economic theory. Most analyses of the evolution of the crisis invoke three themes, contagion, networks and trust, yet none of these play a major role in standard macroeconomic models. What is needed is a theory in which these aspects are central. The direct interaction between individuals, firms and banks does not simply produce imperfections in the functioning of the economy but is the very basis of the functioning of a modern economy. This book suggests a way of analysing the economy which takes this point of view. The economy should be considered as a complex adaptive system in which the agents constantly react to, influence and are influenced by, the other individuals in the economy. In such systems which are familiar from statistical physics and biology for example, the behaviour of the aggregate cannot be deduced from the behaviour of the average, or "representative" individual. Just as the organised activity of an ants’ nest cannot be understood from the behaviour of a "representative ant" so macroeconomic phenomena should not be assimilated to those associated with the "representative agent". This book provides examples where this can clearly be seen. The examples range from Schelling’s model of segregation, to contributions to public goods, the evolution of buyer seller relations in fish markets, to financial models based on the foraging behaviour of ants. The message of the book is that coordination rather than efficiency is the central problem in economics. How do the myriads of individual choices and decisions come to be coordinated? How does the economy or a market, "self organise" and how does this sometimes result in major upheavals, or to use the phrase from physics, "phase transitions"? The sort of system described in this book is not in equilibrium in the standard sense, it is constantly changing and moving from state to state and its very structure is always being modified. The economy is not a ship sailing on a well-defined trajectory which occasionally gets knocked off course. It is more like the slime described in the book "emergence", constantly reorganising itself so as to slide collectively in directions which are neither understood nor necessarily desired by its components.

This open access book examines from a variety of perspectives the disappearance of moral content and ethical judgment from the models employed in the formulation of modern economic theory, and some of the papers contain important proposals about how moral judgment could be reintroduced in economic theory. The chapters collected in this volume result from the favorable reception of the first volume of the Virtues in Economics series and represent further contributions to the themes set out in that volume: (i) examining the philosophical and methodological fallacies of this turn in modern economic theory that the removal of the moral motivation of economic agents from modern economic theory has entailed; and (ii) proposing a return descriptive economics as the means with which the moral content of economic life could be restored in economic theory. This book is of interest to researchers and students of the methodology of economics, ethics, philosophers concerned with agency and economists who build economic models that rest in the intention of the agent.

Prevailing, highly conservative rational choice theories are challenged in this illuminating volume. Mary Zey and other outstanding contributors expand our understanding of decision making theory by presenting evidence that points to the wide range and complexity of human decision making. Labelled as deviations from formal rationality, other models of decision making (habit, emotion, moral and ethical values) are shown to be alternative, not deviant, motives behind decision making. Written at an accessible level, this volume examines criticisms of the rational choice models from a wide range of perspectives. The following chapters then concentrate on micro- and macro- alternatives to rational choice models, including a bala

The principal findings of experimental economics are that impersonal exchange in markets converges in repeated interaction to the equilibrium states implied by economic theory, under information conditions far weaker than specified in the theory. In personal, social, and economic exchange, as studied in two-person games, cooperation exceeds the prediction of traditional game theory. This book relates these two findings to field studies and applications and integrates them with the main themes of the Scottish Enlightenment and with the thoughts of F.A. Hayek.