Figure 2

Reddit data set. Plot of the process \(\log _{10}(D^*_{t,1})-\log _{10}(D^*_{t,2})\) along time. The horizontal dashed red line represents the estimated limit value \({\widehat{u}}=-0.727\).
Reddit data set. Plot of the process \(\log _{10}(D^*_{t,1})-\log _{10}(D^*_{t,2})\) along time. The horizontal dashed red line represents the estimated limit value \({\widehat{u}}=-0.727\).