Marginal mean and 68% CL error bars on cosmological parameters estimated with different data choices for the Plik likelihood, in comparison with results from alternate approaches or model. We assume a ΛCDM model and use variations of the Plik TT likelihood in most of the cases, in combination with a prior τ = 0.07 ± 0.02 (using neither low-ℓ temperature nor polarization data). The “Plik TT+tauprior” case (black dot and thin horizontal black line) indicates the baseline (HM, ℓ_min = 30, ℓ_max = 2508), while the other cases are described in Sect. 4.1 (and 4.2, 5.6, E.4). The grey bands show the standard deviation of the expected parameter shift, for those cases where the data used is a sub-sample of the baseline likelihood (see Eq. (53)). All the results were run with PICO except for few ones that were run with CAMB , as indicated in the labels.