题目: Measuring Ambiguity Attitudes for All (natural) Events

主讲人: 黄振兴，上海财经大学

时间：2017年4月5日 13:30-14:45

地点：暨南大学中惠楼106B室

主办方：暨南大学经济与社会研究院

主讲人简介:

黄振兴现任上海财经大学副教授，他在丁伯根经济研究所和鹿特丹伊拉斯姆斯大学获得博士学位，于丁伯根经济研究所和阿姆斯特丹自由大学获得经济学硕士学位，于复旦-格罗宁根大学获得双学士学位。他的研究领域为决策理论、行为经济学、实验经济学、金融经济学。他的研究成果发表于American Economic Review 、Journal of Institutional and Theoretical Economics 等国际著名期刊。

Abstract:

Measurements of ambiguity attitudes have so far focused on artificial events,
where subjective beliefs can be derived from symmetry assumptions. For natural
events such assumptions usually are not available, creating a difficulty in calibrating
subjective beliefs and, hence, in measuring ambiguity attitudes. This paper introduces
a simple control for subjective beliefs even when they are unknown. We thus allow
for a tractable and completely revealed-preference based measurement of ambiguity
attitudes for all events, including natural ones. We introduce indexes of ambiguity
aversion and ambiguity perception (or understanding) that generalize and unify many
existing indexes. Our indexes are valid under many ambiguity theories. They do not
require expected utility for risk, which is desirable for empirical purposes.
Furthermore, they are easy to elicit in practice. An experiment on ambiguity under
time pressure shows the tractability of our method. It gives plausible results,
supporting the validity of our indexes.