Working Papers

These papers (possibly in older versions) may also be available to download from SSRN or ResearchGate.

(with Jinnie Ooi)

People’s preferences about the fair distribution of resources vary within and between different popula- tions, and this affects many economic and political outcomes. We argue that a source of these differences is the social transmission of fairness norms from peers during adolescence. We ran an experiment on transmission of fairness norms in a friendship network of 11-15 year olds. Observing others’ choices affects young people’s fairness norms, as expressed in both their own choices and the attitudes they express. Our results show how young people can adopt redistributive norms via the social influence of their peer group. We also examine how the strength of social influence varies with friendship status and network position.

(with Itay Ron and Ro'i Zultan)

Cycles of intergroup revenge appear in large scale conflicts. We experimentally test the hypothesis that humans practice group-based reciprocity: if someone harms or helps them, they harm or help other members of that person’s group. Subjects played a trust game, then allocated money between other people. Senders whose partners returned more in the trust game gave more to that partner’s group members. The effect was about 60 per cent of the size of the direct reciprocity effect. Receivers’ allocations to group members did not depend on their partner’s play, suggesting that group reciprocity was only triggered when the partner’s intentions were unequivocal.

Previous political economy theories of globalization have focused on factor mobility's effect on different social groups. But factor mobility also increases competition between state rulers in providing services for their citizens. I ask how this interstate competition affects the process of political change in individual countries. In a simple model, interstate competition substitutes for democracy, by forcing rulers to invest in public goods so as to avoid capital and labor leaving the country. As a result, citizens are less willing to struggle for democracy, and rulers are less willing to oppose it, when interstate competition is strong. Therefore, there is less conflict over the level of democracy. The theory is tested on a post-war panel of countries, using the strength of neighboring countries' capital controls as a proxy for factor mobility. As the theory predicts, states experience fewer changes in their level of democracy when their neighbors are financially open.

Latest changes: New empirics using Chinn-Ito measure of financial openness.

(with David Reinstein)

Previous work has found that in social dilemmas, the selfish always free-ride, while others will cooperate if they expect their peers to do so as well. Outcomes may thus depend on conditional cooperators’ beliefs about the number of selfish types. An early round of the game may be played anonymously, so that contributions cannot be traced back to particular individuals. By protecting low contributors from potential sanctions, this encourages selfish types to reveal their true preferences in their play. We offer a simple model illustrating when revelation of types can increase contributions, and when only an anonymous game can separate types. As a proof of concept, we run a laboratory experiment involving a two-stage public goods game with an exclusion decision between stages. An anonymous first stage led to significantly higher stage-two cooperation than a revealed first stage, a slower decline across the 15 repetitions, unusually high final-stage contributions relative to previous work, and greater profits. Statistical analysis shows that the anonymous first stage reduced uncertainty about types, and this preserved cooperation and led to greater efficiency. Our results suggest that customs such as anonymous church donations may play an important role in building social trust.

Work in Progress

Empirical research on the norm of honesty.

About me

I'm a senior lecturer in the School of Economics at the University of East Anglia.

Contact me

D.Hugh-Jones at