The following manucsripts are available to download in PDF (Adobe Acrobat) format:

Political Laws, first draft of a book manuscript.  

Rational Choice Theory (draft) in the Sage Encyclopedia of Political Theory

Paradox Lost: Explaining and Modeling Seemingly Random Individual Behavior in Social Dilemmas.  (Joe Oppenheimer,  Stephen Wendel & Norman Frohlich 2011). Journal of Theoretical Politics V23, 2(April): 165-187.  

Some Democracies are More Equal Than Others: Using Social Welfare As A Metric For Political Evaluation, (Joe Oppenheimer, Norman Frohlich, Maria Dimitriu & Cyrus Aghamolla) Presented at 2008 APSA meetings, Boston, Aug. 29, 2008.
An Analysis of Context-Dependent Preferences in Voluntary Contribution Games with Agent-Based Modeling. (Stephen Wendel & Joe Oppenheimer 2010)  Journal of Ecoonomic Psychology. 31: (June) 3: 269-284.  
Justice Preferences and the Arrow Problem (Frohlich and Oppenheimer 2007) (J of Theoretical Politics, 19 (4:Oct.): 363-390.
Demystifying Social Welfare: Needs and Social Justice in the Evaluation of Democracies.  (Oppenheimer & Frohlich, 2007). Maryland Law Review, Vol. 67, No. 1: 85-122. (Available on my website.)
Universals, Knowledge Claims, and Methods, forthcoming in Universals in Politics, Ed.  Steve Elkin. (2006).
Skating on Thin Ice: Cracks in the Public Choice Foundation. (Frohlich & Oppenheimer) (J of Theoretical Politics, July 2006).
Empirical Approaches to Normative Theory. (Frohlich & Oppenheimer) The Good Society. 11.2 (2002) 27-32
Why and How Democracies Limit Pluralism (Frajman, Frohlich and Oppenheimer, 2003)
Choosing (Frohlich & Oppenheimer, Fall, 2005)
Modeling Other-Regarding Preferences and an Experimental Test (Dictator Experiments with production). (Frohlich, Oppenheimer & Kurki) Public Choice, (2004)
Understanding, Modeling & Evaluating Conflict Resolution Techniques (Jan., 2001) (Frohlich, Kaufman and Oppenheimer)
Choosing from a Moral Point of View J of Interdisciplinary Economics (February, 2001) Vol.  12: 89-115.(Frohlich & Oppenheimer)
Some Doubts About Measuring Self-Interest Using Dictator Experiments J Ec Behavior & Org Vol.  46, No.  3(November, 2001): 271-290. (Frohlich, Oppenheimer and Moore)
Conflict & Negotiation in International Riparian Disputes (Hewitt, Kurki & Oppenheimer)
Problematic Effects of an Incentive Compatible Device (Frohlich & Oppenheimer) Public Choice, (2003), V.  117, No.  3-4 (December.): 273-293.
Information Aggregation by Majority Rule: Theory and Experiments (Krishna Ladha, Gary Miller and Joe Oppenheimer 1999 version).
How People Reason about Ethics (in Elements of Political Reason: Cognition, Choice and the Bounds of Rationality.  pp.  85 - 107. (eds. Arthur Lupia, Matthew McCubbins, and Sam Popkin).  Cambridge University Press, 2000) (Frohlich & Oppenheimer)
Kenneth Arrow, Welfare Aggregation and Progress in Political Theory, (1999). (Frohlich & Oppenheimer) published in Competition and Cooperation: Conversations with Nobelists about Economics and Political Science. eds James Alt, Margaret Levi, and Elinor Ostrom. New York: Russell Sage Foundation.
Some Consequences of E-mail vs. Face to Face Communication in Experiments, (1998) Frohlich and Oppenheimer) Journal of Economic Behavior and Organization. v. 35: No. 3 (Apr.). pp. 389 - 403.
A Role for Structured Observation in Ethics. by Norman Frohlich & Joe Oppenheimer, Published in Social Justice Research, March ‘97: v.  10, #1, pp.  1-21
Choosing Justice in Experimental Democracies with Production, by Frohlich, Norman & Joe A. Oppenheimer (1990). Published in The American Political Science Review, v. 84, #2 (June): pp. 461-477.
Public Choice and Three Ethical Properties of Politics.  (1985) Public Choice 45: 241 - 255.
Beyond Economic Man (1984) (Frohlich, Oppenheimer, w Bond and Boschman.) Journal of Conflict Resolution v. 28, no. 1, March: 3-24.
Liberating the Industrious Tailor: The case for Ideology and Instrumentalism in the Social Sciences. (1982) (Abel, C. Frederick, and Joe A. Oppenheimer) Political Methodology, 8, no. 1, 39 - 60.