Nonlinear Estimation and Formula Manipulation Commands

CONST

defines scalars as fixed (non-estimable) constants

DIFFER

create equations with analytic derivatives of formulas (FRMLs)

EQSUB

equation substitution, one formula into another

FIML

Full Information Maximum Likelihood estimation (system of linear or nonlinear equations, identities, implicit equations, general cross-equation restrictions, Multivariate Normal errors)

FRML

define a linear or nonlinear equation for estimation

GMM

Generalized Method of Moments estimation, nonlinear, with heteroskedasticity- and autocorrelation-robust standard errors

IDENT

same as FRML but for an identity -- no implied disturbance (for FIML)

LSQ

minimum distance estimation of single or multiple equation linear or nonlinear equations, general cross-equation restrictions, additive error terms (see SUR, 3SLS also)

ML

Maximum Likelihood estimation, log likelihood specified in FRML

MLPROC

Maximum Likelihood estimation, log likelihood specified in a PROC

NONLINEAR options

describes iteration methods and options used by ARCH, BJEST, LSQ, FIML, LOGIT, ML, MLPROC, PROBIT, TOBIT, SIML, SOLVE  

PARAM

defines scalars as estimable parameters, can supply starting values

SUR

Seeming Unrelated Regressions -- LSQ without instruments

3SLS

Three Stage Least Squares -- LSQ with instruments