Assesses the completeness and reliability of 1975 survey data on landlord finances and management gathered in Brown County, Wisconsin, Site I of the Housing Assistance Supply Experiment (HASE). Fieldwork yielded 1,105 field-complete records for an overall sample completion rate of 81 percent. Extensive checks of data quality revealed that (1) virtually all survey interviews were conducted properly, (2) the data contain few unresolved errors, and (3) the incidence of unusable or missing responses is low. Record weights were computed for HASE use in estimating the characteristics of the county's rental properties and the attitudes of the county's landlords toward the housing allowance program. Application of the weights overestimates the number of large mobile home properties and properties with occupied and high-rent single-family units.