Court of Appeals for the Ninth Circuit March 10, 2003, Nos. 01-56199, 01-56231 (Freeman v. San Diego Ass'n of Realtors)

*1140OPINION

KOZINSKI, Circuit Judge:

Competition is the mainspring of a capitalist economy. Sometimes, however, cooperation can make markets more efficient; setting industry standards and pooling market data are two examples of arrangements that often benefit consumers.