 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.
<clarity>  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.
 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.