Humanities Indicators
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II-24a: Median Years to Doctorate,* by Primary Type of Financial Support and Broad Field of Study** for PhDs Graduating 2011–2013

* Time in doctoral program is measured as the difference between the month and year the doctorate was granted and the month and year the student started his or her doctoral program (or most recent master’s degree program, if the master’s was earned at the same institution as the doctorate).
** Life sciences includes agricultural sciences and natural resources; biological and biomedical sciences; and health sciences. Physical sciences includes mathematics and computer and information sciences. Social sciences includes psychology.

Source: National Science Foundation, National Center for Science and Engineering Statistics, Survey of Earned Doctorates (SED; a custom tabulation of SED data was prepared for the Humanities Indicators by NORC at the University of Chicago).

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