Ro'i Zultan

Humans reciprocate by discriminating against group peers Motivated by cycles of intergroup revenge in real-world conflicts, we experimentally test the hypothesis that humans practice group-based reciprocity:…

If you include dictator games where the dictator divides money between two other participants, we had this as part of our design:
www.sciencedirect.com/science/arti...

When times get tough, CSR speaks loudest: a new lab experiment with E. Dadon and @rzultan.bsky.social shows that Corporate Social Responsibility is used and perceived as a signal of future employer support in moments of need—but only among male employers and male workers! doi.org/10.1016/j.je...

Standing against targeted harassment of Professor Michael Ben-Gad 21 October 2025 We, the undersigned, are deeply concerned by a targeted harassment campaign against Michael Ben-Gad, Professor of Economics at City St George’s, University of London, led by a group ca...

Is it acceptable for students to threaten professors with decapitation? If you think it is not, you may want to sign this:
docs.google.com/forms/d/e/1F...

@larakirfel.bsky.social @tobigerstenberg.bsky.social

A framework for blaming willful ignorance, published in Current Opinion in Psychology

People receive more blame for unanticipated consequences of their actions if they could have been informed of said consequences but chose not to. We review possible explanations in our new paper.
doi.org/10.1016/j.co...

By your definition, scientism is worse for qualitative compared to quantitative research (and I think both develop methodological tools to deal with it). So how do you explain the criticism going from qual to quant? Projection?

Coming up!

Abstract: In Weisel and Zultan (2016, 2021a, 2021b, 2022), we claim that whether intergroup conflict is perceived as a threat to the individual or to the group informs the behavioral responses to conflict. In this talk, I will provide an overview of this research program, and share some background and ruminations beyond the information contained in the published papers.

Cooperation Colloquium this week:

Ro'i Zultan @rzultan.bsky.social

Perceptions of intergroup conflict

Date: May 9
Time: 15:00 UTC+2 / 9 am NYC

Sign up: list.ku.dk/postorius/li...

Social image, observer identity and crowding up. Games and Economic Behavior 152:37–54.

Our paper is now in print. social image effects may be stronger if the observer is socially distant, as observed actions have a weaker effect on friends' beliefs. In a field experiment with adolescents, we find heterogenous effects for social distance across age groups.
doi.org/10.1016/j.ge...

This came up earlier in the literature. For example, Erev and Greiner's 1-800 critique or Gilboa, Potlewaite, Samuelson and Schmeidler's argument about rule-based vs. case-based disciplines.

“Poisson is a bitch” – Confucius

Is there also a lecture for young economists who are ambivalent about publishing?

I had a great time meeting people and hanging out!

Spring 2025 Cooperation Colloquia

We're delighted to present an exciting line-up of speakers including @ingelaalger.bsky.social, @al-cibiades.bsky.social, @rzultan.bsky.social, @cmolho.bsky.social, @fernandopsantos.bsky.social

Every 2nd Friday, 15:00 UTC+1

Sign up: list.ku.dk/postorius/li...

One more here, thanks.