JSTOR Daily

Mutational Contributions to Genetic Variance-Covariance Matrices: An Experimental Approach Using Induced Mutations in Arabidopsis thaliana

This is a preview. Log in through your library . Abstract Genetic potential for evolutionary change and covariational constraints are typically summarized as the genetic variance-covariance matrix G, ...
Nature

Comparing G: multivariate analysis of genetic variation in multiple populations

The distribution of genetic variation among multiple traits is a key determinant of how a population will respond to selection (Lande, 1979; Schluter, 1996; Arnold et al., 2001). For the prediction of ...
International Monetary Fund

High-Dimensional Covariance Matrix Estimation: Shrinkage Toward a Diagonal Target

This paper proposes a novel shrinkage estimator for high-dimensional covariance matrices by extending the Oracle Approximating Shrinkage (OAS) of Chen et al. (2009) to target the diagonal elements of ...
JSTOR Daily

Mean-Variance Portfolio Selection with Either a Singular or Nonsingular Variance-Covariance Matrix

This is a preview. Log in through your library . Journal Information The Journal of Financial and Quantitative Analysis (JFQA) is published bimonthly in February, April, June, August, October, and ...