Our paper is subject to several limitations. First, we use major customer disclosures that are required under SFAS 131. This guidance provides a threshold of 10 percent for identifying major customers; as a result, we do not observe significant customers that may be close to that threshold and we must assume that relationships have ceased when that threshold is not met. Further, companies sometimes choose not to identify the names of major customers, thus our sample of customer-supplier dyads may not capture all relationships. Nevertheless, given the contracting demands of major customers for information quality, the disclosure of a supplier ICW significantly reduces the level of trade within the supply chain. Finally, we observe only the dichotomous disclosure of an ICW, rather than a continuous measure of underlying internal control quality, which weakens the power of our tests. Despite these limitations, we believe that our paper provides valuable insight into the consequences of ICWs on the duration of supply chain relationships.