摘要:We let subjects interact with anonymous partners in trust (investment) games
with and without one of two kinds of pre-play communication: numerical (tabular) only,
and verbal and numerical. We find that either kind of pre-play communication increases
trusting, trustworthiness, or both, in inter-subject comparisons, but that the inclusion of
verbal communication generates both a larger effect and one that is robust across both
inter-subject and intra-subject comparisons. In all conditions, trustors earn more when
they invest more of their endowment, trustors and trustees gravitate to ¡°fair and efficient¡±
interactions, and the majority of trustees adhere to their commitments, whether explicit or
implicit. Finally, we study trusting and trustworthiness in the sense of adhering to
agreements, and we find that both are enhanced when the parties can use words, and
especially when an agreement is reached with words and not only with the exchange of
numerical proposals.