  Recently, three reactor neutrino experiments, Daya Bay, Double Chooz and RENO
have directly measured the neutrino mixing angle $\theta_{13}$. In this paper,
another important oscillation parameter, effective $\Delta m_{31}^2$ (= $\Delta
\tilde{m}_{31}^2$) is measured using baseline dependence of the reactor
neutrino disappearance. A global fit is applied to publicly available data and
$\Delta \tilde{m}_{31}^2 = 2.95^{+0.42}_{-0.61} \times 10^{-3}$ eV$^2$,
$\sin^22\theta_{13} = 0.099^{+0.016}_{-0.012}$ are obtained by setting both
parameters free. This result is complementary to $\Delta tilde{m}_{31}^2$ to be
measured by spectrum shape analysis. The measured $\Delta \tilde{m}_{31}^2$ is
consistent with $\Delta \tilde{m}_{32}^2$ measured by $\nu_{\mu}$ disappearance
in MINOS, T2K and atmospheric neutrino experiments within errors. The minimum
$\chi^2$ is small, which means the results from the three reactor neutrino
experiments are consistent with each other.
