“Positive” results by per-capita R&D expenditure in academia.

<p>Percentage of papers supporting a tested hypothesis in each US state plotted against the state's academic R&D expenditure per science and engineering doctorate holder in academia in 2003 (NSF data, in million USD). Papers were published between 2000 and 2007 and classified by the US state of the corresponding author. US states are indicated by official USPS abbreviations. For abbreviations legend, see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0010271#pone-0010271-g001" target="_blank">Figure 1</a>.