Fig. 2.
Average and standard deviation of the growth rate versus number of messages. (A) Results for OC1. The average growth rate of messages conditional to m 0 is almost constant and the standard deviation decays with an exponent βOC1 = 0.22 ± 0.01. (B) Results for OC2. The standard deviation conditional to m 0 decays with an exponent βOC2 = 0.17 ± 0.03. (C) Results for OC1, when the messages are shuffled, displaying βrnd = 1/2. (D) Results for OC2, when the messages are shuffled. In all cases, t 0 corresponds to half of the period of data acquisition and t 1 to the end, which we found to provide optimal statistics (see SI Appendix, Fig. 1).