title: Critical factors in counting the homeless: an invited commentary.
abstract: Several factors affect Wright and Devine's efforts to estimate the size of the homeless population. The most critical ones are the purpose of the estimate, implicit or explicit definitions of homelessness used in the estimate, and the time period covered by the data sets used in the calculations.
mesh_terms: D000328:Adult; D015982:Bias; D003430:Cross-Sectional Studies; D003625:Data Collection; D003710:Demography; D005260:Female; D006703:Ill-Housed Persons / Q000706:statistics & numerical data*; D006801:Humans; D015994:Incidence; D008145:Louisiana / Q000453:epidemiology; D008297:Male; D011638:Public Housing / Q000706:statistics & numerical data*; D014505:Urban Population / Q000706:statistics & numerical data*