  In this paper we consider constraints on the cosmological density parameters
from the spatial power spectrum of QSOs. We first review an analytic approach
to the spatial power spectrum of QSOs, then we compare the result of the
analytic approach with a preliminary result of the power spectrum from the
two-degree Field QSO redshift (2QZ) survey. From a simple chi^2 test, we show
that a finite baryon fraction better explains observation of the QSO power
spectrum, which might suggest a possible detection of the baryonic oscillations
in the QSO power spectrum.
