Technological Improvement Rates vs Simple Patent Count (A), ratio of patents with greater than 20 citations (B), and average number of forward citations within 3 years of publication (C); the Pearson correlation coefficient (cp), the null hypothesis acceptance (cutoff at p = 0.05) and the values of the independent variable for the domains having maximum and minimum values are shown in the upper right corner.
There is an error in the second sentence of the third paragraph in the Results section. The correct sentence is: There seems to be a slight visual trend in the figure, the Pearson correlation is a moderate 0.38 and the p-value is slightly lower than is generally accepted for statistical significance, at 0.043.
Citation: Benson CL, Magee CL (2016) Correction: Quantitative Determination of Technological Improvement from Patent Data. PLoS ONE 11(3): e0151931. https://doi.org/10.1371/journal.pone.0151931
Published: March 21, 2016
Copyright: © 2016 Benson, Magee. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.