Rapid biodiversity loss has prompted global action to prevent further declines, yet
coordinated conservation action among nations remains elusive. As a result, species with …

Direct reciprocity is the tendency to repay others' cooperation. This tendency can be crucial
to maintain cooperation in evolving populations. Once direct reciprocity evolves, individuals …

Direct reciprocity is a powerful mechanism for the evolution of cooperation on the basis of
repeated interactions,,–. It requires that interacting individuals are sufficiently equal, such …

To better understand the mechanism of flight delay propagation at the system-level, we built
a delay causality network (DCN) based on the Granger causality test. Through topological …

American politicians repeatedly and strenuously invoke concerns about fairness when
pitching their trade policies to their constituents, unsurprisingly since fairness is one of the …

It has been widely recognized that delay propagation is a widespread phenomenon in air
transport systems. Regional air transport systems are vulnerable to severe systemic delay …

Background: Less aligned emphasis has been given to the COVID-19 infodemic
coordinating with the COVID-19 outbreak. Global profusion of tangled monikers and …

Reciprocity is a ubiquitous and important human trait. Still, the evolutionary origin is largely
unclear, partly because it is believed that our closest living relatives, other primates, do not …

Cooperation among self-interested players in a social dilemma is fragile and easily
interrupted by mistakes. In this work, we study the repeated n-person public-goods game …

Equitable and reasonable utilization (ERU), the cornerstone of international water law,
recognizes the rights of states to utilize shared water resources. However, there is ambiguity …