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28.3 National estimates are based on the concepts and conventions embodied in SNA93, but for regional estimates there is no separate international standard. Although national concepts are generally applicable to State accounts, there remain several conceptual and measurement issues that either do not apply or are insignificant nationally. Most of the problems arise in the measurement of gross State product for the transport and storage, communication services, and finance and insurance industries, where production often takes place across State borders. In these cases, a number of conceptual views can be applied to the allocation of value added by State.
Full definitions for each of the statistical units in the model are given in Chapters 5 and 6. The brief definitions below omit certain qualifications/exceptions.
28.5 Most economic collection used in the compilation of State accounts are conducted in respect of management units or establishments. Economic collections based on the establishment unit are the most appropriate for compiling State accounts aggregates from the domestic product account because, for most industries, they relate to the productive activity undertaken within a particular State. However, for some industries the establishment is not confined to a single State.
28.6 The definition of the establishment adopted for each industry class is provided in the Australian and New Zealand Standard Industrial Classification (ANZSIC). The establishment is not confined to a single State for the communication services industry, for a significant number of classes in the transport industry, and for defence, research and scientific institutions. By definition, the operations of such units are not delineated on a State basis, even though operations are carried out at locations throughout Australia (an example being Telstra). For these industries, the convention of notional State producer units has been adopted. Such units are notional because of the non-availability of gross operating surplus and value added in respect of them. Various indirect indicators of activity are used to allocate total gross operating surplus across individual States to obtain estimates for the notional State producer units in each of these industries.
28.7 The concept of a single location encompasses the notion of a base of operations which is relevant in situations where operations are carried out by a mobile work force. Accordingly, in certain industries where mobile work forces exist, such as fishing and construction, a single physical location unit applies even though all its economic activity does not take place within the confines of that location.
28.8 For those ABS economic collections which are based on the management unit it is not possible to directly compile estimates by State by classifying each management unit to a particular State. However, such collections usually include a dissection of some data items such as employment, total turnover or total sales. These dissections are obtained by asking each respondent to provide a State split for a very limited number of data items. In the absence of genuine establishment data, the State data collected from management unit collections are used as a proxy for allocating aggregates such as gross operating surplus and gross mixed income by State.