Mathieu Faure : mathieu.faure[at]univ-amu.fr
Gaëtan Fournier : gaetan.fournier[at]univ-amu.fr
We propose a model of product reviews with honest and fake reviews inorder to study the value of information provided on platforms like TripAdvisor,Yelp, etc. In every period, a review is posted which is either honest, i.e., itreveals the reviewerís true experience with the product/service, or fake, i.e., itis fabricated in order to manipulate the publicís beliefs. We establish that theequilibrium is unique and derive a number of robust and interesting results.While fake agents are able to manipulate the publicís beliefs, aggregation ofinformation takes place as long as some of the reviews are honest.