This paper presents a formal theory of reciprocity. Reciprocity means that people reward kind actions and punish unkind …

prevalent at a very young age. However, direct and indirect reciprocity treatments do not increase overall cooperation rates, as …Understanding the roots of human cooperation among strangers is of great importance for solving pressing social … dilemmas and maintening public goods in human societies. We study the development of cooperation in 929 young children, aged 3 …

reciprocity, and third-party punishment – emerges earliest as a means to increase cooperation in a repeated prisoner's dilemma … reciprocate others' behavior, yet direct and indirect reciprocity do not increase overall cooperation rates. We also examine the …We study the development of cooperation in 929 young children, aged 3 to 6. In a unified experimental framework, we …

mechanism reliably supports the evolution of cooperation when actions vary continuously. Ambiguous reciprocity, a strategy …Repeated interactions provide a prominent but paradoxical hypothesis for human cooperation in one-shot interactions … generally ruled out in models of reciprocal altruism, completely undermines cooperation under repeated interactions, which …

), common economic interests, and a shared identity influences altruism, reciprocity and trust of EU citizens. We find that … priming the COVID-19 pandemic increases altruism and reciprocity towards compatriots, citizens of other EU countries, and non-EU … citizens. Priming common European values also boosts altruism and reciprocity but only towards compatriots and fellow Europeans …

organizational structure impacts the effectiveness of reciprocity and to derive specific empirical predictions. We use the UK …-WERS workplace compensation data set to confirm the predictions of our extended model. -- Optimal contracts ; reciprocity …

making ; choice behavior ; public goods ; experimental economics ; altruism ; fairness ; conditional reciprocity …

reduces reciprocity. -- trust ; reciprocity ; investment game ; group membership ; competition …