Template-Type: ReDIF-Paper 1.0 Title: When and Why Do Buyers Rate in Online Markets? Author-Name: Xiang Hui Author-Email: Author-Name: Tobias J. Klein Author-Email: Author-Name: Konrad Stahl Author-Email: Classification-JEL: D83, L12, L13, L81 Keywords: Online Markets, Rating, Reputation Abstract: Anonymous markets would be very difficult to successfully operate without the possibility that buyers rate the seller. Yet many empirical results yield that ratings are non-random and concentrate on extreme experiences. We develop a model of rating decisions in which the buyer is willing to share publicly her opinion about a transaction, if its realized quality differs much from the quality expected by her, where expected quality is influenced by an aggregate of the seller’s past ratings. We demonstrate our results empirically using raw data from eBay. In spite of the non-randomness of responses, unweighted rating aggregates appear to rather well reflect reported buyer experience as long as expectations are not extreme. Note: Length: 42 Creation-Date: 2021-03 Revision-Date: File-URL: https://www.crctr224.de/research/discussion-papers/archive/dp267 File-Format: application/pdf Handle: RePEc:bon:boncrc:CRCTR224_2021_267v1