2 papers
physics.soc-ph2026
Reputation and institutional certification as complementary trust mechanisms in a single online market
Yuta Kido, Yohsuke Ohtsubo
Reputation and institutional certification are the two main trust mechanisms under information asymmetry, yet their interaction remains poorly understood. We analyze nearly one mil…
physics.soc-ph2026
Partial exploiters sustain cooperation: the hump-shaped strategy stably coexists with unconditional cooperators
Kai Otsubo, Yuta Kido, Ryutaro Mori
From collective hunting to environmental problems, social dilemmas are pervasive in human societies. Prior research has documented highly heterogeneous behavioral patterns in such…