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2013 Jun 17
0
Invert a positive definite symmetric Block Toeplitz Matrix
...kelihood of the observations Y_T=(Y_1, ..., Y_T) of an n-dimensional time-series (Y_t) and second, finding an approximation of the MLE by using e.g. the BFGS algorithm. As this algorithm does not function properly (no convergence), I thought that maybe the inversion of the big covariance matrix EY_T Y_T' may be a source a trouble. Thanks for inputs in advance!