Besides that possibility, however, there are motives to cooperation that are not egoistic, but are more restricted than the kind of thing represented by the simplest psychological generalization of the preference schedule OR. There are general dispositions to cooperate which are conditional, and in particular are sensitive to costs: an agent will cooperate if it does not cost too much, but beyond this threshold he will not. The threshold may itself change over time. Moreover, failing perfect knowledge of the other agents' dispositions, he may take a risk on a cooperative initiative if the cost of being deceived falls below a certain threshold. In these various … (R3) A disposition to cooperate is cost sensitive.

DEFINE: Introduces the R3 disposition: cooperation is conditional and cost-sensitive, falling off beyond a threshold.

Diego Gambetta, Trust - Making and Breaking…, loc. 137