order individuals by wealth and compute the running sum: Lorenz curve. there is a special proportion p such that the top p of the population holds 1-p of the wealth, e.g., the top 1% holds 99% of the wealth.
hypothesize that smaller p means greater inequality. another similar measure is the Gini coefficient.
is it guaranteed that there is only one special p?
can p be read off a Lorenz curve?
what if the poorest have negative wealth?
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