RT Journal
A1 Golden R
T1 VOucher incentives to increase childhood immunization rates
JF JAMA
JO JAMA
YR 1999
FD February 24
VO 281
IS 8
SP 702
OP 703
DO 10-1001/pubs.JAMA-ISSN-0098-7484-281-8-jbk0224
UL http://dx.doi.org/10-1001/pubs.JAMA-ISSN-0098-7484-281-8-jbk0224
AB 
Assessment and referral is listed as an intervention, but
it occurred at all sites. Monitoring is referred to but never defined.
At one point, the authors imply that monitoring involves collecting
voucher incentive process data. If so, there cannot be monitoring
without voucher incentives. However, if monitoring means assessment and
referral, there cannot be voucher incentives without monitoring. Thus,
the data may be used to compare voucher incentives plus assessment and
referral vs assessment and referral, but they cannot be used to infer
the effects of voucher incentives or assessment and referral alone.