Rate of publication hastens, but number of publications slows academic promotion.

Openings for an assistant professor often attract a hundred or more applicants. This allows hiring committees to select highly productive candidates based on their number of publications. Applicants with more rapid publication would be hired with little or no postgraduate experience, but those with slower rates of publication would need more postgraduate experience. Our results show an association of more postgraduate experience, slower rates of publication, a smaller research group, and slower promotion when years are measured from PhD granting; conversely little or no postgraduate experience is generally associated with more rapid publication, a larger research group, and faster promotion. These results suggest the unexpected result that the number and rate of publication have opposite effects on the years from PhD granting to promotion which parametric survival analysis using a log-logistic distribution with gamma frailty confirmed. Statistical analysis revealed that number and rate of publication are reciprocal suppressor variables which were individually weaker predictors of years to promotion, but much more powerful when combined. Intuitively, this is probably because number and rate of publication contain information about other variables with: (1) number of publications being associated with more postgraduate experience, a smaller research group, and slower rates of publication; and (2) rate of publication being associated with a larger research group, and less postgraduate experience. Further, we found that promotion committees closely follow institutional tenure policy requiring promotion a fixed number of years after hiring as an assistant professor which may partially explain why promotion committees fail adjust the number and rate of publication for research group size as fairness in promotion might favor. Our results suggest that both postgraduate experience and research group size influence a professor's career.