Constrained preference elicitation
研究规划者如何不完全揭示代理人偏好，仅需识别其所属类型，并给出了类型空间可被揭示的充要条件。
A planner wants to elicit information about an agent's preference relation, but not the entire ordering. Specifically, preferences are grouped into “types,” and the planner wants only to elicit the agent's type. We first assume that beliefs about randomization are subjective, and show that a space of types is elicitable if and only if each type is defined by what the agent would choose from some list of menus. If beliefs are objective, then additional type spaces can be elicited, though a convexity condition must be satisfied. These results remain unchanged when we consider a setting with multiple agents.