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Non-response in the American time use survey : who is missing from the data and how much does it matter?
Abraham, Katharine G.; Maitland, Aaron; Bianchi, Suzanne M. - 2006
Persistent link: https://www.econbiz.de/10003382837
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Inference with "difference in differences" with a small number of policy changes
Conley, Timothy G.; Taber, Christopher - 2005
Persistent link: https://www.econbiz.de/10003030220
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The NBER manufacturing productivity database
Bartelsman, Eric J.; Gray, Wayne B. - 1996
Persistent link: https://www.econbiz.de/10001590480