https://usbig.net/wp-content/uploads/2023/03/USBIG-logo-1a.png00Michael Howardhttps://usbig.net/wp-content/uploads/2023/03/USBIG-logo-1a.pngMichael Howard2013-08-21 00:06:412013-08-21 00:06:41“Attrition Bias in Experimental and Panel Data: The Gary Income Maintenance Experiment.”
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