We analyze how environmental taxes should be optimally levied in a sequential game which regulators and firms face costs uncertainties. First, the regulator chooses intensity of emissions to reduce externalities. Then, facing common private information with noisy signals, compete marketplace choose outputs. show that, under nonuniform quality signals across firms, may calibrate differentiated t...

This paper studies a decentralized supply chain in which a manufacturer sells a common generic product through two traditional and online retailers under free riding market. We assume that the traditional retailer provides the value added services but the online retailer does not. Factors such as retail prices, local advertising of the retailers, global advertising of the manufacturer and servi...