Gerson Lehrman Group | Expert network insider trading

The FBI agents questioning a consultant for Gerson Lehrman Group. Consultant shows the government's examination of the expert-network business is broader than Primary Global. Criminal and civil authorities are investigating whether these consultants passed inside information to clients, who pay the expert companies large fees for their services.

Bloomberg offers some prospects for the industry, which produces up to $ 500 million in revenue in 2009. Number of expert networks at domestic has increased from about 40 last year, about eight in 2001. Most of these companies is a Gerson Lehrman, who manages the network based in New York and offers perhaps 60 percent of the market.