15.4 Review the two-step fitting method for the model of Example 15.7 of Heckman (1976). Contrast the

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15.4 Review the two-step fitting method for the model of Example 15.7 of Heckman (1976). Contrast the assumptions made by that method and by the ML fitting procedure in Problem 15.3 (see e.g., Little 1985a).

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Statistical Analysis With Missing Data

ISBN: 9780470526798

3rd Edition

Authors: Roderick J. A. Little, Donald B. Rubin

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