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We study large scale structure in the cosmology of Coleman-de Luccia bubblecollisions. Within a set of controlled approximations we calculate the effectson galaxy motion seen from inside a bubble which has undergone such acollision. We find that generically bubble collisions lead to a coherent bulkflow of galaxies on some part of our sky, the details of which depend on theinitial conditions of the collision and redshift to the galaxy in question.With other parameters held fixed the effects weaken as the amount of inflationinside our bubble grows, but can produce measurable flows past the number ofefolds required to solve the flatness and horizon problems.

Bubble, Bubble, Flow and Hubble: Large Scale Galaxy Flow from Cosmological Bubble Collisions