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Producer Price Index Manual: Theory and Practice ... - METAC

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<strong>Producer</strong> <strong>Price</strong> <strong>Index</strong> <strong>Manual</strong><br />

Thus, to the accuracy of a second-order approximation,<br />

the direct Young index will exceed its time<br />

antithesis by a term equal to the direct Young index<br />

times the weighted variance of the deviations<br />

of the price relatives from their weighted mean.<br />

Thus, the bigger the dispersion in relative prices,<br />

the more the direct Young index will exceed its<br />

time antithesis.<br />

402

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