International trade,secondary output and concentration in Canadian manufacturing industries, 1979 |
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| Authors: | John R Baldwin Paul K Gorecki John S McVey |
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| Institution: | 1. Department of Economics , Queen's University , Kingston , Ontario , K7L3N6 , Canada;2. Economic Council of Canada , P.O. Box 527, Ottawa , Ontario , K1P5V6 , Canada;3. Statistics Canada , R. H. Coats Building, Tunney's Pasture, Ottawa , Ontario , K1A 0T6 , Canada |
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| Abstract: | Census concentration measures do not account for either secondary output or imports. Taking these into account, for Canada in 1979, shows that measured concentration substantially overstates the degree to which a small number of firms controls a large proportion of industry output. Correcting for imports has a much greater effect than correcting for secondary output. These results are much more apparent in national than regional industries. On the other hand, taking into account exports has virtually no effect on estimates of concentration. These findings strengthen, as well as throw additional light on earlier work for the UK and Canada, which made ad hoc corrections to census concentration measures. |
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