Working paper Inference on Vertical Contracts between Manufacturers and Retailers Allowing for Nonlinear Pricing and Resale Price Maintenance Céline Bonnet, and Pierre Dubois IDEI Working Paper n. 583, May 2009 ReferenceCéline Bonnet, and Pierre Dubois, “Inference on Vertical Contracts between Manufacturers and Retailers Allowing for Nonlinear Pricing and Resale Price Maintenance”, IDEI Working Paper, n. 583, May 2009.