Determining the Hubble constant from Hubble parameter measurements
  We use 28 Hubble parameter, $H(z)$, measurements at intermediate redshifts
$0.07 \leq z \leq 2.3$ to determine the present-day Hubble constant $H_0$ in
four cosmological models. We measure $H_0 = 68.3^{ +2.7}_{ -2.6 }, 68.4^{ +2.9
}_{ -3.3 }, 65.0^{ +6.5 }_{ -6.6 }$ and $ 67.9^{ +2.4}_{-2.4}$ km s${}^{-1}$
Mpc${}^{-1}$ (1$\sigma$ errors) in the $\Lambda$CDM (spatially flat and
non-flat), $\omega$CDM and $\phi$CDM models, respectively. These measured $H_0$
values are more consistent with the lower values determined from recent cosmic
microwave background and baryon acoustic oscillation data, as well as with that
found from a median statistics analysis of Huchra's compilation of $H_0$
measurements,but include the higher local measurements of $H_0$ within the
2$\sigma$ confidence limits.
