An important characteristic of any buyer‐supplier relationship is the amount and type of information that is exchanged between the contracting parties. Buyer‐supplier networks are characterized by greater information exchange than arm’s‐length transactions. This enhanced information exchange allows for greater production efficiency but increases the potential for information misappropriation. In this paper we characterize the set of innovations for which each of these forms of exchange relationships is efficient. We then explore the effect of an initial information linkage between the buyer and supplier. Such linkages increase the set of innovations for which networks are efficient. However, such linkages have a negative effect on the buyer’s incentive to innovate and an ambiguous effect on the supplier’s incentive to invest in flexible production techniques. Finally, we identify settings in which the buyer‐supplier surplus is greater with such linkages.