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. 2011 Dec 28;6(12):e29738. doi: 10.1371/journal.pone.0029738

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Matthews et al.

This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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Figure 4: — The number of full-time faculty (blue) in the biological sciences has decreased between 1981 and 2006, while the number of postdoctoral fellows (green) has increased, and number of nonfaculty full-time positions (red) has remained relatively steady. Faculty included full-time full, associate, and assistant professors plus instructors. Nonfaculty positions included research associates, adjunct appointments, lecturers, and administrative positions. SOURCE: National Science Foundation, Science and Engineering Indicators 2010.