Lübbers, T.: Is Cartelisation Profitable? A Case Study of the Rhenish Westphalian Coal Syndicate, 1893-1913. (2009), 42 pp.

Lüdemann, J.: Rechtsetzung und Interdisziplinarität in der Verwaltungsrechtswissenschaft. (2009)

Magen, S.: Rechtliche und ökonomische Rationalität im Emissionshandelsrecht. (2009)

Morell, A.; Glöckner, A.; Towfigh, E. V.: Sticky Rebates: Target Rebates Induce Non-Rational Loyalty in Consumers. (2009)

Nicklisch, A.; Wolff, I.: Cooperation norms in multiple-stage punishment. (2009)

Nikiforakis, N.; Normann, H.-T.; Wallace, B.: Asymmetric Enforcement of Cooperation in a Social Dilemma. (2009)

Petersen, N.: Abkehr von der internationalen Gemeinschaft? – Die aktuelle Rechtsprechung des US Supreme Court zur innerstaatlichen Wirkung von völkerrechtlichen Verträgen –. (2009)

Petersen, N.: The Reception of International Law by Constitutional Courts through the Prism of Legitimacy. (2009)

Petersen, N.: Review Essay: How Rational is International Law? (2009)

Rincke, J.; Traxler, C.: Deterrence Through Word of Mouth. (2009)

Traxler, C.: Majority Voting and the Welfare Implications of Tax Avoidance. (2009)

Traxler, C.; Winter, J.: Survey Evidence on Conditional Norm Enforcement. (2009)

von Weizsäcker, C. C.: Asymmetrie der Märkte und Wettbewerbsfreiheit. (2009)

Weinschenk, P.: Persistence of Monopoly and Research Specialization. (2009), 27 pp.

Hennig-Schmidt, H.; Geng, H.: Sensitivity to Corruption - An Experimental Investigation in China, (2009)

Hennig-Schmidt, H.; Geng, H.; Walkowitz, G.: Are groups Better in Capitalizing on Power than Individuals?, (2009)

Hennig-Schmidt, H.; Geng, H.; Walkowitz, G.: On Fairness in Symmetric and Asymmetric Ultimatum Games – An Experimental Investigation in China and Germany, (2009)

Hennig-Schmidt, H.; Leopold-Wildburger, U.: Path Dependence of Cooperation – An Experimental Investigation on the Prisoner’s Dilemma Game, (2009)

Hennig-Schmidt, H.; Selten, R.; Wiesen, D.: How Payment Systems Affect Physicians' Provision Behavior - An Experimental Investigation, (2009)

Hennig-Schmidt, H.; Yan, Z.: Equity and Prominence in Asymmetric Bargaining – An Experimental Study on Aspiration Formation and Adaptation in Germany and P. R. China, (2009)