export(
	relative.effect,   
	pscore,   
	ps.makestrata,
	ps.match,   
	dist.plot,
	ps.balance,   
	ps.estimate
)

import(
	lme4
)

exportClasses(
		pscore,	      
		stratified.pscore,
	        stratified.data.frame,	      
	        matched.pscore,
	        matched.data.frame,
	        matched.data.frames
)

S3method(ps.makestrata, pscore)
S3method(ps.makestrata, data.frame)

S3method(ps.match, pscore)
S3method(ps.match, data.frame)

S3method(dist.plot, pscore)
S3method(dist.plot, stratified.pscore)
S3method(dist.plot, stratified.data.frame)
S3method(dist.plot, matched.pscore)
S3method(dist.plot, matched.data.frame)
S3method(dist.plot, matched.data.frames)
S3method(dist.plot, data.frame)

S3method(ps.balance, stratified.pscore)
S3method(ps.balance, stratified.data.frame)
S3method(ps.balance, matched.pscore)
S3method(ps.balance, matched.data.frame)
S3method(ps.balance, matched.data.frames)
S3method(ps.balance, data.frame)

S3method(ps.estimate, data.frame)
S3method(ps.estimate, stratified.pscore)
S3method(ps.estimate, stratified.data.frame)
S3method(ps.estimate, matched.pscore)
S3method(ps.estimate, matched.data.frame)
S3method(ps.estimate, matched.data.frames)

