Computes the MRCE estimators (Rothman, Levina, and Zhu, 2010)
and has the dataset stock04 used in Rothman, Levina, and Zhu (2010),
originally analyzed in Yuan et al. (2007).
Rothman, A.J., Levina, E., and Zhu, J. (2010). Sparse multivariate regression with covariance estimation. Journal of Computational and Graphical Statistics 19:974--962.
Yuan, M., Ekici, A., Lu, Z., and Monteiro, R. (2007). Dimension reduction and coefficient estimation in multivariate linear regression. Journal of the Royal Statistical Society Series B 69(3):329--346.
Jerome Friedman, Trevor Hastie, Robert Tibshirani (2008). Sparse inverse covariance estimation with the graphical lasso. Biostatistics, 9(3), 432-441.
Jerome Friedman, Trevor Hastie, Robert Tibshirani (2010). Regularization Paths for Generalized Linear Models via Coordinate Descent. Journal of Statistical Software, 33(1), 1-22.