In addition to ranking Manhattan’s biggest brokerage firms by listings (see charts on adjacent pages) as it had done in years past, The Real Deal ran its first-ever ranking of Manhattan firms by closed deals (encompassing only sales above $1 million) in its May 2013 issue. The ability to rank firms based on closed sales rather than on a snapshot of listings was the result of improved data-gathering methods as well as better transparency in the industry. Data was provided by the website StreetEasy with additional research by The Real Deal.