Marginal mean and 68% CL error bars on cosmological parameters estimated adopting different data choices for the Plik likelihood, in comparison with results from alternate approaches or model. Top: TE tests; we assume a ΛCDM model and use the Plik TE+tauprior likelihood in most of the cases, with a prior on τ = 0.07 ± 0.02 (we do not use low-ℓ temperature or polarization data here.). The “Plik TE+tauprior” case (black dot and thin horizontal black line) indicates the baseline (HM, ℓ_min = 30, ℓ_max = 1996), while the other cases are described in Appendix C.3.5. The grey bands show the standard deviation of the expected parameter shift, for those cases where the data used are a sub-sample of the baseline likelihood (see Eq. (53)). All the cases shown in these TE plots are run with PICO , except for the “Plik EE+tauprior, CAMB ” case, which is run with CAMB (see Appendix C.5 for further details). Bottom: EE tests; the same as the top plots, but for the Plik EE+tauprior likelihood. For these EE plots we used CAMB instead of PICO to run all the cases (including Plik TT+tauprior and Plik TE+tauprior).