Negotiations typically involve multiple issues: in addition to the transaction price, bargainers need to determine the scope of an agreement. We design a lab experiment to study behavior across different information and bargaining structures in a multi-issue context. Consistent with recent...

We let subjects in a voluntary contribution experiment make non-binding numerical announcements about their "possible" contributions and, in some treatments, send written promises to contribute specific amounts. We find that announcements were responded to both by others' announcements and by...