Fig. 4From: Optimized segmented regression models for the transition period of intervention effectsOutcome time series of total monthly births. July 2007 and June 2016 are the start and end time points, respectively, of the time series, while June 2013 represents the nominal intervention time point (free delivery services policy). The shaded area in the figure represents an example scenario of the transition period \([{T}_{0},{T}_{2}]\) corresponding to \(L=10\)Back to article page