In 2011, 29% of large and midsize employers offered windows, up from 18% in 2007, according to benefits consulting firm Aon Hewitt.

FORBES: Jumping Out The 401(k) Brokerage Window

As the world seeks to re-establish itself following the 2008 financial crisis and the 2010 Arab Spring, U.K. based risk consulting firm, Aon, published their political risk map with Roubini Global Economics on Tuesday.

FORBES: The World's Riskiest Nations

The new disclosure rules are "going to give employers more control and leverage to negotiate lower fees, " said Pamela Hess, director of retirement research at Aon Hewitt, a human-resources consulting company.

WSJ: 401(k) Plans Step Into the Sunshine

"Collective trusts provide the overall benefits of a mutual fund such as professional investment management, a broadly diversified portfolio of holdings, and the like generally at a much more effective price point, " says Winfield Evens, a partner and director at Aon Hewitt, a human-resources consulting firm based in Lincolnshire, Ill.

WSJ: Why 'Collective Trusts' Are Worth Considering

Hewitt's chief executive, Russ Fradin, will run the combined consulting and outsourcing operation, which will be called Aon Hewitt.

FORBES