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<meta property="og:title" content="Compare average tax rates by percentile — compare_avg_tax_rates" />
<meta property="og:description" content="To determine the effects of bracket creep on a proposed tax policy,
a common task is calculate the change in the average tax rates for each percentile.
This function accepts a sample file and a baseline sample file, and returns a 100-row table
giving the mean change in average tax rates for each percentile, compared to the