search for: eta_t

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2005 Feb 24
0
KalmanXXXX and deJong-Penzer statistic?
...been implemented in one of the S packages , SsfPack, as the book on that states on p 531 'the standardized smoothed disturbances may be interpreted as t-statistics for impulse intervention variable in the transition and measurement equations.' and equations for the statistic are: eta_t / sqrt(var(eta_t), where eta_t and var have hats over them. The second equation is identical, with 'eta' replaced by 'epsilon'. On page 524 we also have: "the smoothed disturbance estimates are the estimates of the measurement equation innovations epsilon and transition equati...
2002 Dec 10
1
autoregressive poisson process
Dear R users, I am trying to find a package that can estimate an autoregressive model for discrete data. I am imagining a Poisson or Gamma process in which the mean (say mu) follows a process such as mu_t = a + b*x + c*mu_{t-1} Suppose I have data on the time-series Poisson outcomes and x and would like to obtain ML estimates for b and c. Does anyone know of a package that can do this