We present an algorithm for automatically constructing a decompositional shape model from examples. Unlike current approaches to structural model acquisition, in which one-to-one correspondences among appearance-based features are used to construct an exemplar-based model, we search for many-tomany correspondences among qualitative shape features (multi-scale ridges and blobs) to construct a ge...

This paper re-examines the problem of estimating risk premia in unconditional linear factor pricing models. Typically, data used empirical literature are characterized by weakness some factors, strong cross-sectional dependence errors, and (moderately) high dimensionality. Using an asymptotic framework where number assets/portfolios grows with time span while exposures weak factors local-to-zer...