The Economics of Clear Advice and Extreme Options
研究委托人如何通过限制代理人可选行动（如剔除中间选项）来激励其收集信息，适用于风险厌恶或风险中性的代理人。
I study a principal-agent model in which the agent collects information and then chooses a verifiable action. I show that the principal can find it desirable to constrain the agent's action set even though there is no disagreement about the ranking of actions ex post. The elimination or penalization of "intermediate" actions, which are optimal when information is poor, improves incentives for information collection. I characterize optimal action sets when the agent is infinitely risk averse with respect to income shocks and optimal incentive schemes when the agent is risk neutral. Copyright 2005, Wiley-Blackwell.