"An Ad Man Tests the Limits" (In Depth, Mar. 3, 2008)"An Ad Man Tests the Limits" (In Depth, Mar. 3) incorrectly stated that GroupM CEO Irwin Gotlieb had accompanied Steve Ridley, who runs subsidiary Kinetic in the Americas, on calls to U.S. outdoor advertising companies to discuss a plan to revise ad-purchasing arrangements; Ridley's visits were made without Gotlieb. The story also inaccurately said that advertising rebates are prohibited in France. While France set strict limits on rebates in 1993, requiring that the terms of any such arrangements be spelled out contractually, it did not ban them outright. The story should have included GroupM's assertion that its policy is to include any rebate arrangements in client contracts. While the article correctly noted that Gotlieb expects GroupM to continue to expand its sources of revenue, it incorrectly stated that he predicted GroupM might eventually stop representing advertisers at all."The Customer Service Champs" (Special Report, Mar. 3, 2008)A table accompanying "The Customer Service Champs" (Special Report, Mar. 3) mischaracterized the incentives Wachovia (WB) uses to reward employees who provide exceptional customer service. Honorees receive certificates and become eligible for monthly cash drawings."Housing's Deep Dive" (News You Need to Know, Mar. 10, 2008)A chart entitled "Housing's Deep Dive" (News You Need to Know, Mar. 10, 2008) was incorrectly labeled. The figures measure home-price changes year over year, not month over month."E*Trade's New Fees" (Personal Business, Mar. 10, 2008)"E*Trade's (ETFC) New Fees" (Personal Business, Mar. 10, 2008) cited incorrect expense ratios for the Vanguard 500 Index fund and Vanguard Developed Markets Index fund. The correct figures are 0.15% and 0.22%, respectively.