On the concepts of trust and assurance
There are strong reasons to believe that different actors are more willing to cooperate if they are confident that other actors will do the same, both in the voluntary and regulated cases. This confidence can have different bases. For example, in the case of voluntary collective action, trusting the other actors seems particularly important, whereas political and institutional trust seems more important in the case of regulated collective action, i.e. trusting that the relevant authorities will enforce the relevant regulations.