In models of sequential decision making herd behaviour occurs if the signals smart(dumb) agents receive are (un)correlated and if agents have reputational concerns. We show thatintroducing costly effort to become informed about project payoffs (i) eliminates herdbehaviour and (ii) shifts...

We study committees that acquire information, deliberate and vote. A member cares about state-dependent decision payoffs and about his reputation for expertise. The state remains unobserved, even after the decision has been taken. In such inconclusive environments, in equilibrium, a member's...

Theory predicts that committees of experts may take decisions that look good but are bad and that they show a united front to impress evaluators. Although evaluators see through this behavior, committees persist in it only to avoid worse assessments. We investigate this theory in the lab, using...