SIHS SEMINAR Series
SIHS SEMINAR Series
2026年5月29日(金) May 29 (Fri.), 2026 5:20PM-6:50PM
報告者/Presenter: Hyundam Je (University of Seoul)
Title: Does the Size of the Signal Space Matter?
場所：2号館11階経済学部会議室B
Venue: 11th Floor, Bldg. No.2 Meeting Room B
幹事/Organizer：長谷部拓也/Takuya Hasebe & 橋立洋祐/Yosuke Hashidate
言語/Language：英語/English
要旨/Abstract: How does signal space size affect demand for information? We run laboratory experiments where signals vary in cardinality but hold instrumental value constant under expected utility. In our main setting, subjects purchase signals revealing which state determines the outcome of a compound lottery, and willingness to pay rises with signal space size—contradicting expected utility theory. Robustness tests show bids track instrumental value when it varies,ruling out misunderstanding. In another setting where lotteries include a free signal, valuations no longer increase with space size. We propose an entropy-based framework where people derive non-instrumental utility from uncertainty reduction, reflecting curiosity-driven motives.
SIHSセミナーは、上智大学・人間の安全保障研究所 (SIHS) が主催するオープンな学術セミナーです。学内・学外を問わず、興味のある研究者・院生・学生の方はお気軽にご参加ください。The SIHS Seminar series is hosted by Sophia Institute for Human Security (SIHS). Our academic seminar series is open to anyone who is interested; all researchers, graduate students, and undergrad students are welcome. Feel free to participate if you are interested.