Figure 3

Dependence of the duration of succeeding call on the gap as a function of ego age. (a) The regression slopes (β) characterizing the strength of the dependence of the duration of the succeeding call on the logarithm of the inter-call gap, plotted as a function of the ego age for the original data and the randomized data. The legends are same as in (b). (b) The regression slopes (\(\beta'\)) characterizing the strength of the dependence of the duration of the succeeding call on the logarithm of the inter-call gap, when both the duration and the gap are scaled by their respective averages. The error bars span the 95% confidence level.