Daniel Hausman

This paper makes a modest point. Suppose one wants to evaluate alternative policies, institutions or even constitutions on the basis of their consequences. To do so, one needs to evaluate their consequences and one needs to know what their consequences are. Let us suppose that the role of economic theories and game theory in particular is mainly to help us to use information we already possess or that we can acquire at a reasonable cost to judge what the consequences will be. We do not necessarily need true theories or theories that provide perfectly precise predictions. What sort of accuracy and precision we need depends on how the consequences of alternative policies are evaluated. The worth of an economic theory in this context of policy assessment depends on the accuracy of the predictions the theory permits, the costs of gathering the needed information, and the costs of learning and using the theory. My only excuse for uttering these truisms is that well known economists and philosophers have denied them

Many ethical theories, including in particular consequentialist moral the ories, require comparisons of the amount of good possessed or received by different people. In the case of some goods, such as monetary income, wealth, education, or health, such comparisons are relatively unproblematic. Even in the case of such goods there may be serious empirical measurement problems, but there appear to be no difficulties in principle. Thus Cooter and Rappoport maintained that there was no serious difficulty of making interpersonal utility comparisons for an earlier generation of economists who regarded utility as an index of “material welfare.”

This essay develops an account of health, the functional efficiency theory, which derives from Christopher Boorse's biostatistical theory. Like the BST, the functional efficiency theory is a nonevaluative view of health, but unlike the BST, it argues that the fundamental theoretical task is to distinguish levels of efficiency with which the parts and processes within organisms and within systems within organisms function. Which of these to label as healthy or pathological is of secondary importance. Because the statistical distributions that Boorse's account relies on are distributions of functional efficiency, the functional efficiency theory arguably complements rather than challenges the BST.

The health gradient among those who are by historical standards both remarkably healthy and well-off is of considerable moral importance with respect to benevolence, justice and the theory of welfare. Indeed it may help us to realize that for most people the good life lies in close and intricate social ties with others which can flourish only when inequalities are limited. The health gradient suggests that there is a story to be told in which egalitarian justice, solidarity, health and well-being go hand-in-hand

People condemn inequalities for many reasons. For example, many who have no concern with distribution per se criticize inequalities in health care, because these inequalities lessen the benefits provided by the resources that are devoted to health care. Others who place no intrinsic value on distribution believe that a just society must show a special concern for those who are worst off. Some people, on the other hand, do place an intrinsic value on equality of distribution, regardless of its contribution to other goals. Derek Parfit and Larry Temkin call these people "egalitarians." I shall always employ quotation marks when referring to "egalitarians" in this special sense, because, as I shall argue, this terminology is misleading. One of its unhappy implications is that almost all egalitarians are not "egalitarians."

The Inexact and Separate Science of Economics offers an overview of standard microeconomics and general equilibrium theory. These are not the whole of orthodox economics, and orthodox economics is not the whole of economics. But orthodox economics dominates the profession, and the theoretical core of microeconomics and general equilibrium theory – what I called ‘equilibrium theory’ – is central to most orthodox economics. Unlike many methodological works, which focus almost exclusively on the empirical problems of equilibrium theory and its applications, ISSE is also concerned with the structure, strategy and heuristics of equilibrium theorizing, and it attempts to link questions about theory appraisal to questions about structure and strategy. It is addressed both to philosophers interested in epistemological questions posed by the social sciences and to economists interested in reflecting on and improving their discipline. Its inspiration lies in the work of John Stuart Mill.

This paper is concerned with the puzzling divorce that exists between writing on economic methodology and work by philosophers of science. After documenting the extent and nature of the separation and making some disparaging comments about the quality of much of the literature on economic methodology, this essay argues that the divorce results from the differences between the aims of philosophers of science, who are concerned to learn about knowledge acquisition in disciplines such as economics, and the more immediately practical aims of writers on economic methodology, who want to improve the practice of economics. Even with the transcendence of logical positivism or logical empiricism, this separation should persist, although communication between philosophers and eonomists should improve and collaboration increase.

This paper asks why causal asymmetries should give rise to explanatory asymmetries. One way to give some rationale for the asymmetries of causal explanation is to adopt a pragmatic view of explanation and to stress the fact that causes can be used to manipulate their effects. This paper argues, however, that when one recognizes that causal asymmetry is fundamentally an asymmetry of "connectedness", one can see how causal asymmetry leads to an objective difference between explanations in terms of causes and explanations in terms of effects. The pragmatic differences are subsidiary.

This essay attempts to distinguish the pressing issues for economists and economic methodologists concerning realism in economics from those issues that are of comparatively slight importance. In particular I shall argue that issues concerning the goals of science are of considerable interest in economics, unlike issues concerning the evidence for claims about unobservables, which have comparatively little relevance. In making this argument, this essay raises doubts about the two programs in contemporary economic methodology that raise the banner of realism. In particular I argue that the banner makes it more difficult to relate the concerns of those who wave it to those of other methodologists. Although this essay argues that many of the debates in this century between scientific realists and their opponents are not relevant to economics, it does not attack scientific realism, and it does not urge economists or economic methodologists to reject it.

In ordinary circumstances, human actions have a myriad of unintended and often unforeseen consequences for the lives of other people. Problems of pollution are serious examples, but spillovers and side effects are the rule, not the exception. Who knows what consequences this essay may have? This essay is concerned with the problems of justice created by spillovers. After characterizing such spillovers more precisely and relating the concept to the economist's notion of an externality, I shall then consider the moral conclusions concerning spillovers that issue from a natural rights perspective and from the perspective of welfare economics supplemented with theories of distributive justice. I shall argue that these perspectives go badly awry in taking spillovers to be the exception rather than the rule in human interactions. I. Externalities Economists have discussed spillovers under the heading of “externalities.” To say this is not very helpful, since there is so much disagreement concerning both the definition and significance of externalities.

This essay argues that what is central to Christopher Boorse’s biostatistical theory of disease as statistically subnormal part function (BST) are comparisons of the “functional efficiency” of parts and processes and that statistical considerations serve only to pick out a healthy level of functional efficiency. On this interpretation, the distinction between health and pathology is less important than comparisons of functional efficiency, which are entirely independent of statistical considerations. The clarifications or revisions of the BST that this essay offers are friendly amendments that render moot some of the most prominent criticisms of Boorse’s account

This paper argues that egalitarian theories should be judged by the degree to which they meet four different challenges. Fundamentalist egalitarianism, which contends that certain inequalities are intrinsically bad or unjust regardless of their consequences, fails to meet these challenges. Building on discussions by T.M. Scanlon and David Miller, we argue that egalitarianism is better understood in terms of commitments to six egalitarian objectives. A consequence of our view, in contrast to Martin O'Neill's “non-intrinsic egalitarianism,“ is that egalitarianism is better understood as a family of views than as a single ethical position