Ad fraud has serious consequences for brands. However, only limited theoretical works have addressed this topic, and empirical research is scarce. In this paper, we examine ad fraud behavior at different levels of vertical contractual structure. Using two unique data sets separately containing...

We construct a model of market-share contracts with vertical externalities. When a dominant supplier offers a linear wholesale price to a retailer, vertical externalities, well-recognized as double-marginalization problems, arise in the vertical relation. The dominant supplier facing vertical...