Fig. 2From: Inferencing superspreading potential using zero-truncated negative binomial model: exemplification with COVID-19The estimation of dispersion parameter, k, under scenarios with different under-reporting ratios, w, of index cases who have 0 secondary case associated and different true values of k. In each panel, the curves show the log-likelihood profiles, and the triangular dots indicate the maximum likelihood estimates (MLE) of k. The zero-truncated version is shown in red, the non-truncated version is shown in blue, and the true values of k is indicated by the vertical green lineBack to article page