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Derived variables for longitudinal studies

Authors
  • D. R. Cox
  • Nanny Wermuth
Publisher
The National Academy of Sciences
Publication Date
Oct 26, 1999
Source
PMC
Keywords
License
Unknown

Abstract

Suppose that for each individual a vector of features is measured at a number of time points. We look for a transformation of the features, the same at all time points, that will induce a simple dependency structure. In the simplest situation this requires that a certain asymmetric matrix has real nonzero eigenvalues. Extensions are considered.

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