“…Past aggregate level research has investigated the many influences and incentives affecting academic scientists' productivity (see, e.g., Foltz et al 2011;Stephan 2012); addressed the increase in incentives for faculty to compete for grants increasingly from National Science Foundation, National Institutes of Health and private sources rather than USDA (e.g., Huffman and Evenson 2006;Alston et al 2010); and explored the increase in commercial opportunities, which may be synergistic with, or detract from, time devoted to public science (e.g., Sampat 2006;Foltz, Kim, and Barham 2007;Thursby, Fuller, and Thursby 2009). Only Harter, Becker, and Watts (2011) have done something similar for academic economists, with more of an emphasis on the allocation of time across research and teaching activities than on the evolution of research productivity outcomes and how they relate to a broader suite of time measures.…”