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Logistic Regression Using SAS®: Theory and Application by Paul D. Allison

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8.5. Postdoctoral Training Example

The techniques that work for panel data also work for other kinds of clustered data. In this section, we’ll apply the GEE method and the fixed-effects method to data in which newly minted Ph.D.s are clustered within universities. The sample consisted of 557 male biochemists who got their doctorates from 106 American universities in the late 1950s and early 1960s (McGinnis, Allison and Long 1982). The outcome variable PDOC is coded 1 if they got postdoctoral training and 0 otherwise. The sample is about evenly split, with 49% getting some form of postdoctoral training immediately after receiving their degrees. Other variables examined here are

AGEAge in years at completion of the Ph.D.
MAR1 if married, 0 otherwise ...

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