addColumns	addColumns
addCorData	addCorData
addPeriods	addPeriods
defData	defData
defDataAdd	defDataAdd
defMiss	defMiss
defRead	defRead
defReadAdd	defReadAdd
defSurv	defSurv
genCluster	genCluster
genCorData	genCorData
genData	genData
genMiss	genMiss
genObs	genObs
genSurv	genSurv
mergeData	mergeData
trtAssign	trtAssign
trtObserve	trtObserve
