A free-rider problem arises when a group choice between two alternatives has to be made on the basis of privately collected evidence, leading to insufficient effort in gathering evidence and an ex ante welfare loss for the group. To alleviate the free-rider problem, the group can commit to a...

In an assignment market with uncertainty regarding productive ability of participants, early contracting can occur as participants balance risk sharing and sorting efficiency. More promising agents may contract early with each other because insurance gains outweigh sorting inefficiency, whereas...

We present a model of delegation with self-interested and privately informed experts. A team of experts with extreme but opposite biases is acceptable to a wide range of decision makers with diverse preferences, but the value of expertise from such a team is low. A decision maker wants to...