Starting with the aim of an actual contract implementation, this thesis contributes to the supply chain contracting literature at various levels in vertically differentiated settings.;We first identify the economic distortions that arise when a manufacturer sells vertically differentiated products through a retailer and propose several coordinating contracts in both monopolistic and competitive settings. We later derive the equilibrium when a gray market emerges and show the efficiency of wholesale pricing in the existence of gray markets. We also discuss how the performance of the supply chain contracts studied earlier in the literature starts to change in these settings. We then identify the inefficiencies in multi-supplier one-manufacturer settings where the manufacturer's decision is what quality to choose from each supplier. We propose various contracts to mitigate these inefficiencies. Finally, considering an inventory model with advance supply information, where the supply information is modeled as dynamic forecasts of capacity availability, we characterize the optimal policy for such systems and develop a heuristic and derive the operating environments under which information is more valuable.
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