Before revision:  First, consumers can use disclosure to amplify competition between firms . Second, consumers can share information that induces a seller---even a monopolist---to make price concessions. Furthermore, whether consumer control improves consumer surplus depends on both the technology of disclosure and the competitivenessof the marketplace.
After revision:  First, consumers can use disclosure to amplify competition between firms . Second, consumers can disclose information to induce even a monopolist to lower prices. Whether consumer control improves consumer surplus depends on both the technology of disclosure and the competitivenessof the marketplace.