Market structure and strategic bi-sourcing

We provide a new rationale for bi-sourcing, which refers to the situation where a final goods producer buys an input from an outside supplier and also produces it in-house. We also show the effects of the product market competition and the implications of different and common outside input suppliers on the profits of the final goods producers. In-house input production reduces the price charged by the outside input supplier, and may make bi-sourcing as a profitable strategy. Under bi-sourcing, the final goods producers may be better off by outsourcing to a common input supplier than by outsourcing to different input suppliers. In the presence of bi-sourcing, the final goods producers may not have the incentive for cooperation in the product market. Our results show that even if the final goods producer's marginal cost of in-house input production is higher than the outside supplier's marginal cost of input production, bi-sourcing makes the consumers better off compared to complete outsourcing.