Equation 24 · Part 1 · Forty Million Clicks Through One Uneven Door

Symbol delta

\delta = 0.1

\delta

What this part means

the given bias.

Its job in the formula

delta is part of the quantity the equation computes from the expression on the right.

Full expressionSymbol deltaArticle meaning

Where the article explains it

Solving for the minimum defect correlation needed to produce a given bias $\delta$ , and taking the most generous possible bound for a roughly binary preference indicator, $\sigma_Y$ $\le$ 0.5 , gives what this article calls, for a specific country c , its Country Selection-Divergence Bound: $\mathrm{CSDB}_c(\delta)$ = $\frac{\delta}{\sigma_Y}$ $\sqrt{\frac{f_c}{1-f_c}}$ .

The passage around this formula

…extremes for n — 101 respondents at the low end, 448,125 at the high end [ 1 ] — is how small $\rho_{R,Y}$ would need to be, at illustrative (not dataset-matched) population scales, to produce a cross-country divergence of $\delta$ = 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 $\times$ 10^{-4} , giving $\mathrm{CSDB}$ $\approx$ 0.002 . For a nation of order 3 $\times$ 10^{8} residents sampled at n=448{,}125 :…

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Learn the underlying idea

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

[1] The Moral Machine experiment ↗

These citations provide research context; check each source for the exact claim it supports.