Results for the power-law model of the curvature perturbations described by Eq. (25). Left panel: 1σ and 2σ contours of the posterior distributions on the amplitude A_ζ and the slope of the power spectrum n_s obtained by the analysis of DR2New. Right panel: 1σ and 2σ contours of the power spectra inferred from the DR2New analysis by picking 1000 random samples from the posteriors overlaid with the current constraints on the primordial power spectrum using the latest Planck data. The grey colour depicts the 2σ-confidence intervals. The green lines and purple shaded areas are the same as in Fig. 19.