@techreport{NBERt0328,
 title = "Non-response in the American Time Use Survey:  Who Is Missing from the Data and How Much Does It Matter?",
 author = "Katharine G. Abraham and Aaron Maitland and Suzanne M. Bianchi",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Technical Working Paper Series",
 number = "328",
 year = "2006",
 month = "September",
 URL = "http://www.nber.org/papers/t0328",
}