TY - JOUR AU - Mullainathan,Sendhil AU - Schwartzstein,Joshua AU - Shleifer,Andrei TI - Coarse Thinking and Persuasion JF - National Bureau of Economic Research Working Paper Series VL - No. 12720 PY - 2006 Y2 - December 2006 UR - http://www.nber.org/papers/w12720 L1 - http://www.nber.org/papers/w12720.pdf N1 - Author contact info: Sendhil Mullainathan Department of Economics Littauer M-18 Harvard University Cambridge, MA 02138 Tel: 617/496-2720 Fax: 617/495-7730 E-Mail: mullain@fas.harvard.edu Joshua Schwartzstein Dartmouth College E-Mail: josh.schwartzstein@dartmouth.edu Andrei Shleifer Department of Economics Harvard University Littauer Center M-9 Cambridge, MA 02138 Tel: 617/495-5046 Fax: 617/496-1708 E-Mail: ashleifer@harvard.edu M3 - presented at "MIDM Conference", November 4, 2006 AB - We present a model of coarse thinking, in which individuals group situations into categories, and transfer the informational content of a given message from situations in a category where it is useful to those where it is not. The model explains how uninformative messages can be persuasive, particularly in low involvement situations, and how objectively informative messages can be dropped by the persuader without the audience assuming the worst. The model sheds light on product branding, the structure of product attributes, and several puzzling aspects of mutual fund advertising. ER -