In science, attrition are ratios regarding the loss of participants during an experiment. Attrition rates are values that indicate the participant drop out. Higher attrition rates are found in longitudinal studies.
Fitzgerald, John; Gottschalk, Peter; Moffitt, Robert (1998). "An Analysis of Sample Attrition in Panel Data: The Michigan Panel Study of Income Dynamics" (PDF). Journal of Human Resources. 33 (2): 251–299. doi:10.2307/146433. JSTOR 146433.
Wooldridge, Jeffrey M. (2010). Econometric Analysis of Cross Section and Panel Data. Cambridge: MIT Press. pp. 837–842. ISBN9780262296793.
January 01, 1970
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