The SNA concept of mixed income is similar to the NIPA concept of proprietors' income and is used as the balancing item for unincorporated enterprises that do not qualify as quasi-corporations (that is, for all the entities in the adjusted, SNA-based households and NPISH sector except for owner-occupiers, households leasing dwellings, and households employing domestic staff).
These adjustments provide estimates that are more consistent with the SNA, but further improvements to consistency will require reevaluating the assumption that none of the unincorporated enterprises qualify as quasi-corporations. Full consistency with SNA guidelines will also require the development of additional source data and methods to allow for the reclassification from the personal sector to the business sector of the income of unincorporated businesses that do qualify as quasi-corporations and conversely, for the reclassification from the business sector to the household sector of the production of unincorporated enterprises that do not qualify as quasi-corporations.
Government units that behave as corporations (or in the SNA, "public corporations") are treated as quasi-corporations and are classified in the corporations sector as long as they meet several criteria, including independence with respect to decisionmaking and finance, "economically significant" prices, and the existence of separate and complete accounts.
All federal government enterprises are reclassified under the assumption that they all qualify as quasi-corporations, but the characteristics of these enterprises have not been evaluated recently, and it is possible that they may not meet the criteria for quasi-corporations with respect to independence, separate and complete accounts, or market prices.