We continue the study of the distribution of nonsupersymmetric flux vacua in
IIb string theory compactified on Calabi-Yau manifolds, as in hep-th/0404116.
We show that the basic structure of this problem is that of finding
eigenvectors of the matrix of second derivatives of the superpotential, and
that many features of the results are determined by features of the generic
ensemble of such matrices, the CI ensemble of Altland and Zirnbauer originating
in mesoscopic physics. We study some simple examples in detail, exhibiting
various factors which can favor low or high scale supersymmetry breaking.Comment: 28 pages, JHEP Latex format. v2: a correction further favoring high
scale, v3: minor clarification