@article{publications2116,
          volume = {vol. 70},
          number = {n? 3},
          author = {Philippe Bontems and Vincent R{\'e}quillart},
           title = {Remarks on Good vs Bad Characteristics in Vertical Differenciation},
       publisher = {Elsevier},
         journal = {Economics Letters},
           pages = {427--429},
            year = {2001},
             url = {https://publications.ut-capitole.fr/id/eprint/2116/}
}