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- Domar aggregation is an approach to aggregating growth measures associated with industries to make larger sector or national aggregate growth rates. The issue comes up in the context of national accounts and multifactor productivity (MFP) statistics. The objective is to construct the growth rate of an aggregate MFP residual, a sector or national total, as a weighted average of the growth rates of the MFP residuals of its component industries or firms, usually to discuss how industry-specific changes affected the aggregate. The weights on each industry are called Domar weights. The Domar weight for each industry when adding their MFPs together is the ratio of the nominal value of each industry's gross output to GDP, the sum of value-added output of all the industries together. The objective is to properly account for effects of productivity changes in intermediate goods and industries whose goods are both output and inputs for other industries. The term "market value of the industry's output" can be used in place of the accounting term "gross output." By construction, Domar weights sum up to a figure larger than 1.0, because the revenue of some firms comes from the sales of intermediate to other firms so some revenues are multiply counted in the firm by firm accounting, in the numerators of the Domar weights, but are netted out in GDP. Example: a tire-maker's sales might go mainly to the makers of cars, trucks, bicycles, and so forth who sell their products with tires included, so tire revenues are multiply counted. (en)
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- Domar aggregation is an approach to aggregating growth measures associated with industries to make larger sector or national aggregate growth rates. The issue comes up in the context of national accounts and multifactor productivity (MFP) statistics. (en)
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