On the tension between growth rate and CMB data
  We analyze the claimed tension between redshift space distorsions
measurements of $f(z)\sigma_8(z)$ and the predictions of standard $\Lambda$CDM
(Planck 2015 and 2018) cosmology. We consider a dataset consisting of 17 data
points extending up to redshift $z=1.52$ and corrected for the Alcock-Paczynski
effect. Thus, calculating the evolution of the growth factor in a $w$CDM
cosmology, we find that the tension for the best fit parameters $w$, $\Omega_m$
and $\sigma_8$ with respect to the Planck 2018 $\Lambda$CDM parameters is below
$2\sigma$ in all the marginalized confidence regions.
