Photo from Camili biosphere reserve, Macahel, Artvin, Turkey
I am a junior professor at the Chair of Business Ethics at the University of Cologne.
My research is mostly focused on (mostly unethical) group behavior in a variety of contexts. A few of my projects concerns the effect of group identity on individual decisions and ingroup bias.
I am always happy to discuss new research ideas. Please contact me at: gonul2517(at)gmaildotcom
“Are strangers just enemies you have not yet met? Group homogeneity, not intergroup relations, shapes ingroup bias in three natural groups” with L. Glowacki and H. Rusch. 2022. Philosophical Transactions of the Royal Society B 377.1851 (2022): 20210419. Journal article here.
Former title: “Ingroup love drives ingroup bias within natural groups”
“Lying in a foreign language?” with D. Alempaki and Y. Yang. (supercedes “When in Rome: Lying in a foreign language”) 2021. Journal of Economic Behavior and Organization. Final version here. Journal article here.
“Friend or foe? Social ties in bribery and corruption” with J. D. Zheng and A. Schram. 2021. Experimental Economics. Final version here. Journal article here.
“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.
"Group image concerns" with A. Apffelstaedt and F. Hoffmann (this version: July 2024)
“Pyramid schemes” with K. Kalaycı and P. Man (this version: October 2024)
“Social learning in groups” with L. Wenner (October 2024)
“Social groups with selfish individuals” (this version: May 2020)
Sleepy paper: “Lying to be fair” with R. Roggema (this version: September 2015)
Social exclusion
Does social exclusion affect task performance, if so, is it through the information it conveys or psychological costs?
Authoritarian preferences (with L. Strang)
We propose a novel measurement of preferences for authoritarian voting rules and test it in a representative German population, compare East and West Germany.
Issue-driven ingroup bias and elections (with M. Büyükboyacı and S. Küçükşenel)
In five waves, we measure individuals' issue positions on political and non-political issues, how much they exhibit ingroup bias based on issue positions, and whether national elections impact them.
Media bias and national image (with L. Müller and L. Strang)
Is covid19 news coverage more positive than reality?
Greenpeace campaign impact on firms' financial performance (with S. Grundner)