Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Attack frequency by treatment and contribution decisions. Participants who contributed in the first phase, i.e., cooperators, are more willing to engage into a conflict against defectors, i.e., not contributors, especially in the egalitarian group treatment. Defectors, instead, do not discriminate between defectors and cooperators in the egalitarian group treatment, while they do in hierarchical treatments.
