システム情報系 社会工学域
平成26年度 ファカルティ・セミナー
(Faculty Seminar)
日 時 : 2014年12月25日(木) 15:00-17:00
場 所 : 第三学群F棟 3F1223
講演者 : 千葉 早織(ちば さおり)
[Department of Management Università
Ca' Foscari Venezia]
司会者 : 栗野 盛光
演 題 : Extensions and
Vagueness of Language under
Two-Dimensional State Uncertainty
We examine languages under
two-dimensional uncertainty about the state—the type and support of the
state-distribution as well as the state is ex-ante uncertain. We consider
communication between an uninformed decision maker and an imperfectly
informed speaker. We show that this two-dimensional uncertainty leads the
extension of language to be vague in the sense that the speaker with different
knowledge of the state-distribution uses the same symbol for the different
extent of information on the state. We also explore languages when the players
contract over the number of symbols due to bounded rationality and when they
possesses different prior beliefs.