Using findings from a federally mandated statewide study of homelessness in
the state of Iowa, this paper presents methodologies developed to address
various aspects of homeless research, including enumeration of the populati
on, screening for reporting duplications, estimating the annual number of i
ncidents of homelessness, and exploring county-level estimates of homelessn
ess. After implementing an algorithm to eliminate duplicate reporting, and
using the baseline unduplicated reported number of homeless persons, a stat
ewide estimate of the number of homeless individuals was derived. Following
further adjustments for differences in agency reporting practices and afte
r extrapolating for nonreported time periods, we Estimated the number of un
ique incidents of homelessness experienced in the state during the year of
the study (1997). The policy implications of these findings are discussed.