Résumé
The present paper investigates the pricing behavior of a green firm competing against a brown firm where the polluting good is sold in a perfect competitive market. The distorsion of the price to signal a green product is too great to face any demand. Pooling price equilibria emerge as the most plausible situations as long as the brown firm has the possibility to mimic the pricing behavior of the green firm. A green producer is thus constrained to practice uninformative prices which can conduct to the lemon outcome (Akerlof 1970)