Nonsampling Error: Although every effort (as described in the Data Processing section) is made in all phases of collection, processing, and tabulation to minimize errors, the survey is subject to nonsampling error such as the inability to obtain data for every variable for all units, inaccuracies in classification, mistakes in keying and coding, and coverage errors.
While the data records are ultimately from state government sources, the classification of finances among the different categories is entirely the responsibility of the Census Bureau. Therefore, classification might not reflect the actual classification or presentation as requested by the various state government respondents.
Response Distribution: The overall unit response rate for the 2007 Annual Survey of State Government Finances was 100 percent. All of the 50 state governments responded to the survey's request for administrative records, the core source materials for these statistics. Although some state-level dependent entities may not have responded to the Census Bureau's request for financial statements, as they are all part of a single unit of measure (i.e. the state government), unit response rates are measured based on the response of the central government to Census Bureau data requests.