Non-Gaussianity and Excursion Set Theory: Halo Bias
  We study the impact of primordial non-Gaussianity generated during inflation on the bias of halos using excursion set theory. We recapture the familiar result that the bias scales as $k^{-2}$ on large scales for local type non-Gaussianity but explicitly identify the approximations that go into this conclusion and the corrections to it. We solve the more complicated problem of non-spherical halos, for which the collapse threshold is scale dependent. 
Peter Adshead, Eric J. Baxter, Scott Dodelson and Adam Lidz
astro-ph.CO gr-qc