What's the tax advantage of 401(k)s?
Munnell, Alicia Haydock, Laura Quinby, and Anthony Webb. “What's the tax advantage of 401(k)s?”. Issue in Brief 12-4, Chestnut Hill, Mass.: Center for Retirement Research at Boston College, February 2012. http://hdl.handle.net/2345/bc-ir:103942.