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title = {{Too Many {PhD} Graduates or Too Few Academic Job Openings: The Basic Reproductive Number R 0 in Academia}},  journal = {Syst. Res.},  }  @article{Cyranoski_2011,  doi = {10.1038/472276a},  url = {http://dx.doi.org/10.1038/472276a},  year = {2011},  month = {apr},  publisher = {Nature Publishing Group},  volume = {472},  number = {7343},  pages = {276--279},  author = {David Cyranoski and Natasha Gilbert and Heidi Ledford and Anjali Nayar and Mohammed Yahia},  title = {{Education: The {PhD} factory}},  journal = {Nature},  }