The transition of the advertising market from traditional media to the internet has induced a proliferation of marketing agencies specialized in bidding in the auctions that are used to sell ad space on the web. We analyze how collusive bidding can emerge from bid delegation to a common...

This study provides an empirical test of the Bolton, Freixas and Shapiro (2012) credit ratings model using data from art auctions. Our empirical work discovers that, despite the fact that art and bonds belong to totally different asset classes, financial intermediaries and investors behave in...