I am a Junior Professor in the area of Corporate Development and Business Ethics at the University of Cologne since May 2015. My current research is mostly focused on group behavior. I am interested in the effect of group identity, mob formation, dilution of morality via groups and group decision-making.


Faculty of Management, Economics and Social Sciences

Chair of Corporate Development and Business Ethics

Universitätstraße 22a

Universität zu Köln


“Friend or foe? Social ties in bribery and corruption” with J. D. Zheng and A. Schram (Accepted at Experimental Economics)

“Deception and reciprocity” with D. Alempaki and S. Saccardo. 2019. Experimental Economics, 22(4), 980-1001. Open access journal article here.

“How to choose your victim” with K. Abbink. 2019. Games and Economic Behavior, 113:482-496. Final version: August 2018. Journal article here.

“Collusion in a buyer-seller network formation game”. 2018. Journal of Economic Behavior and Organization, 155:445-457. Full-text here.

“Spoils division rules shape aggression between natural groups” with L. Glowacki and H. Rusch. 2018. Nature Human Behaviour, 2(5): 322-326. Full-text here.

“The effect of link costs on simple buyer-seller networks” with M. van Assen and J. Potters. 2013. Games and Economic Behavior, 77(1): 229-246.

“Testing models of pure exchange” with M. van Assen. 2009. Journal of Mathematical Sociology, 33: 97-128.

“The stability of exchange networks” with M. van Assen, A. van de Rijt, and V. Buskens. 2009. Social Networks, 31: 118-125.

Working Papers:

“Lying in a foreign language?” with D. Alempaki and Y. Yang (supercedes “When in Rome: Lying in a foreign language” this version: September 2019, R&R in JEBO)

“Social groups with selfish individuals” (this version: May 2020)

“Ingroup love drives ingroup bias within natural groups” with L. Glowacki and H. Rusch (May 2020)

Sleepy paper: “Lying to be fair” with R. Roggema (this version: September 2015)

Work In Progress:

“Pyramid schemes” with Kenan Kalaycı and Priscilla Man (manuscript under preparation)

“Social exclusion” (manuscript under preparation)

“(Anti-)Social learning in groups” with Lukas Wenner

“A model of lying and reciprocity”