The evolution of cooperation is a pivotal area of study, essential for understanding the
survival and success of complex biological and social systems. This paper investigates the …

Cooperation between strangers can be difficult to explain. Several mechanisms have been
shown to sustain cooperation among which one of the most general is Indirect Reciprocity …

We explore indirect reciprocity with optional interactions and private information and
stochastic evolution of staying together. Indirect reciprocity is cooperation based on …