Although the pharmaceutical company Merck spent $21 million on a 20-month investigation led by a former U.S. district judge, the report's conclusion that "executives at Merck had not knowingly put Vioxx patients in cardiovascular danger" may not boost the drugmaker's sagging reputation. "Some critics say the report is not credible because of Merck's board's involvement" and point out that Debevoise & Plimpton, the firm whose lawyers carried out the study, has a "pro-corporate" reputation.