Firms change over time. Which changes are so damaging that consumers believe the firm’s very identity ceases to exist? We explored this question using Twitter data and eight experiments involving nearly 3,000 subjects. Consumers judged that moral deteriorations were particularly disruptive to...

Consider a two-product firm that decides on the quality of each product. Product quality is unknown to consumers. If the firm sells both products under the same brand name, consumers adjust their beliefs about quality subject to the performance of both products. We show that if the probability...