Template-type: ReDIF-Paper 1.0 Author-Name: Dr. Romain Baeriswyl Author-Name-First: Romain Author-Name-Last: Baeriswyl Author-Person: pba446 Author-Name: Camille Cornand Author-Name-First: Camille Author-Name-Last: Cornand Author-Person: pco917 Title: Reducing overreaction to central banks' disclosures:theory and experiment Abstract: Financial markets are known for overreacting to public information. Central banks can reduce this overreaction either by disclosing information to a fraction of market participants only (partial publicity) or by disclosing information to all participants but with ambiguity (partial transparency). We show that, in theory, both communication strategies are strictly equivalent in the sense that overreaction can be indifferently mitigated by reducing the degree of publicity or by reducing the degree of transparency. We run a laboratory experiment to test whether theoretical predictions hold in a game played by human beings. In line with theory, the experiment does not allow the formulation of a clear preference in favor of either communication strategy. This paper then discusses the opportunity for central banks to choose between partial transparency and partial publicity to control market reaction to their disclosures. Length: 60 pages Creation-Date: 2012 Contact-Email: forschung@snb.ch File-URL: https://www.snb.ch/en/publications/research/working-papers/2012/working_paper_2012_08 File-Format: text/html Number: 2012-08 Classification-JEL: C92, D82, D84, E58 Keywords: heterogeneous information, public information, overreaction, transparency, coordination, experiment Handle: RePEc:snb:snbwpa:2012-08