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Equation 27 · Part 1 · Forty Million Clicks Through One Uneven Door

Symbol f

f≈1.01×10−4f \approx 1.01\times10^{-4}
ff

What this part means

f is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

Its job in the formula

f is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

The passage around this formula

…scales, to produce a cross-country divergence of δ\delta = 0.1 , a magnitude in the range visible between clusters in the paper’s own Fig. 3b radar plot. For a nation of order 10^{6} residents sampled at n=101 : f ≈\approx 1.01×\times10^{-4} , giving CSDB\mathrm{CSDB} ≈\approx 0.002 . For a nation of order 3×\times10^{8} residents sampled at n=448{,}125 : f ≈\approx 1.49×\times10^{-3} , giving CSDB\mathrm{CSDB} ≈\approx 0.0077 . Both bounds sit an order of magnitude below the largest within-sample demographic coefficient…

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A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.

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Sources cited in the surrounding passage

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