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Law, Morality, and Economics: Integrating Moral Constraints With Economic Analysis of Law

70 Pages Posted: 18 Apr 2007 Last revised: 15 Apr 2015

Eyal Zamir

Hebrew University of Jerusalem - Faculty of Law

Barak Medina

Hebrew University of Jerusalem - Faculty of Law

Abstract

Economic analysis of law is a powerful analytical methodology. However, as a purely consequentialist approach, which determines the desirability of acts and rules solely by assessing the goodness of their outcomes, standard cost-benefit analysis (CBA) is normatively objectionable. Thus, for example, it presumably approves the deliberate killing of one innocent person to save the lives of two, and the breaking of a promise whenever it would produce slightly more net benefit than keeping it.

Moderate deontology prioritizes such things as autonomy, basic liberties, truth telling, and promise keeping over the promotion of good outcomes. It holds that there are constraints on promoting the good. Such constraints may be overridden only if enough good (or bad) is at stake. Thus, it may justify killing an innocent person only for the sake of saving many more (perhaps hundreds or thousands) people, and breaking a promise only to avoid considerable losses. Moderate deontology conforms to prevailing moral intuitions. At the same time, it is arguably lacking in methodological rigor and precision.

Can the normative flaws of economic analysis be rectified without relinquishing its methodological advantages? Can deontological moral constraints be formalized and modeled so as to make their analysis more rigorous? This Article examines the possibility of combining economic methodology and deontological morality through explicit and direct incorporation of moral constraints into economic models. It discusses various substantive and methodological choices involved in modeling deontological constraints. It proposes to determine the permissibility of any act or rule infringing a deontological constraint by means of mathematical threshold functions. The Article presents the general structure of threshold functions and analyzes their elements. It then illustrates the implementation of constrained CBA in several contexts, including discrimination in the marketplace, legal paternalism, and risking innocent people while fighting terrorism. It then addresses possible objections to our proposal.

Deontologically constrained CBA is more complex than standard CBA. Yet, we maintain that it is superior to its alternatives. It rectifies the normative flaws of conventional CBA without significantly compromising its methodological rigor. Concomitantly, it improves deontology by making the analysis of threshold constraints more precise and its policy implications potentially more determinate. Constrained CBA also better explains people's behavior and prevailing legal doctrines.

Keywords: Cost benefit analysis, moral constraints, threshold deontology, antidiscrimination, consequentialism, incommensurability, normative ethics, paternalism, public morality, terrorism, utilitarianism, welfare economics

JEL Classification: A11, A12, A13, D61, D63, D78, H50, K00

Suggested Citation

Zamir, Eyal and Medina, Barak, Law, Morality, and Economics: Integrating Moral Constraints With Economic Analysis of Law. California Law Review, Vol. 96, p. 323, April 2008. Available at SSRN: https://ssrn.com/abstract=980766

Eyal Zamir

Hebrew University of Jerusalem - Faculty of Law ( email )

Mount Scopus, 91905
Israel
+972 2 582 3845 (Phone)
+972 2 582 9002 (Fax)

Barak Medina (Contact Author)

Hebrew University of Jerusalem - Faculty of Law ( email )

Mount Scopus, 91905
Israel

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