The Research Seminar in Economics is a platform for invited speakers to present their current research, thereby facilitating the exchange between speakers and faculty members of the City University of London.
It covers empirical as well as theoretical contributions across all fields of economics. The Research Seminar in Economics is usually held weekly during the academic term.
This event is open to Department of Economics faculty and postgraduate students. Please contact firstname.lastname@example.org for any enquiries.
About the event
In the canonical persuasion model, comparative statics has been an open question. We answer it, delineating which shifts of the sender’s interim payoff lead her optimally to choose a more informative signal.
Our first theorem identifies an ordinal notion of ‘increased convexity’ that we show characterises those shifts of the sender’s interim payoff that lead her optimally to choose no less informative signals.
To strengthen this conclusion to ‘more informative’ requires further assumptions: our second theorem identifies the necessary and sufficient condition on the sender’s interim payoff, which strictly generalises the ‘S’-shape commonly imposed in the literature.
Ludvig Sinander (Oxford University)
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