Description Usage Arguments Examples
This function calculates the values of valid moment combinations for two-step Generalized Method of Moments using the extended classification method, applied to the zero-truncated count component ("positive Poisson") of a hurdle model for excess-zero longitudinal data. It allows for unbalanced longitudinal data, meaning subjects can be observed for different numbers of times. The function returns a vector "types" indicating validity of different moments conditions.
1 | validComb_EC_PP(yvec, Zmat, Xmat, betaI, Tvec, alpha, r)
|
yvec |
The vector of responses, ordered by subject, time within subject. |
Zmat |
The design matrix for time-independent covariates ((N*T) x K0). |
Xmat |
The design matrix for time-dependent covariates ((N*T) x Ktv). |
betaI |
The current or initial estimates of the model parameters (1+K0+Ktv x 1). |
Tvec |
The vector of times for each subject. |
alpha |
The significance level for inclusion of moment conditions. |
r |
The residuals from fitting an initial hurdle GEE model using the independent working correlation structure. |
1 |
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