Predicting a Prior for Planck
  The quantum state of the universe combined with the structure of the
landscape potential implies a prior that specifies predictions for
observations. We compute the prior for CMB related observables given by the
no-boundary wave function (NBWF) in a landscape model that includes a range of
inflationary patches representative of relatively simple single-field models.
In this landscape the NBWF predicts our classical cosmological background
emerges from a region of eternal inflation associated with a plateau-like
potential. The spectra of primordial fluctuations on observable scales are
characteristic of concave potentials, in excellent agreement with the Planck
data. By contrast, alternative theories of initial conditions that strongly
favor inflation at high values of the potential are disfavored by observations
in this landscape.
