export("binaryChoice")
export( "heckit" )
export( "heckit2fit" )
export( "heckit5fit" )
export( "heckitTfit" )
export( "heckitVcov" )
export( "invMillsRatio" )
export( "probit" )
export( "selection" )
export( "tobit2fit" )
export( "tobit2Bfit" )
export( "tobit5fit" )
export("treatReg")
export( "linearPredictors" )

import( "maxLik" )

importFrom( "Formula", "as.Formula" )
importFrom( "miscTools", "coefTable" )
importFrom( "miscTools", "nObs" )
importFrom( "miscTools", "nParam" )
importFrom( "mvtnorm", "dmvnorm" )
importFrom( "mvtnorm", "pmvnorm" )
importFrom( "stats", "as.formula" )
importFrom( "stats", "binomial" )
importFrom( "stats", "coef" )
importFrom( "stats", "complete.cases" )
importFrom( "stats", "contrasts" )
importFrom( "stats", "delete.response" )
importFrom( "stats", "dnorm" )
importFrom( "stats", "fitted" )
importFrom( "stats", "formula" )
importFrom( "stats", "lm" )
importFrom( "stats", "logLik" )
importFrom( "stats", "model.frame" )
importFrom( "stats", "model.matrix" )
importFrom( "stats", "model.response" )
importFrom( "stats", "na.action" )
importFrom( "stats", "na.pass" )
importFrom( "stats", "naresid" )
importFrom( "stats", "nobs" )
importFrom( "stats", "pchisq" )
importFrom( "stats", "pnorm" )
importFrom( "stats", "printCoefmat" )
importFrom( "stats", "residuals" )
importFrom( "stats", "terms" )
importFrom( "stats", "vcov" )
importFrom( "systemfit", "systemfit" )
importFrom( "utils", "tail" )
importFrom( "VGAM", "predictvglm" )
importFrom( "VGAM", "rhobitlink" )

S3method( "coef", "selection" )
S3method( "coef", "summary.selection" )
S3method( "fitted", "probit" )
S3method( "fitted", "selection" )
S3method( "linearPredictors", "probit" )
S3method( "logLik", "probit" )
S3method( "logLik", "selection" )
S3method( "model.frame", "binaryChoice" )
S3method( "model.frame", "selection" )
S3method( "model.matrix", "binaryChoice" )
S3method( "model.matrix", "selection" )
S3method( "nobs", "probit" )
S3method( "nObs", "probit" )
S3method( "nobs", "selection" )
S3method( "nObs", "selection" )
S3method( "predict", "probit" )
S3method( "predict", "selection" )
S3method( "print", "coef.selection" )
S3method( "print", "probit" )
S3method( "print", "selection" )
S3method( "print", "summary.probit" )
S3method( "print", "summary.selection" )
S3method( "residuals", "probit" )
S3method( "residuals", "selection" )
S3method( "summary", "probit" )
S3method( "summary", "selection" )
S3method( "vcov", "selection" )
