I’m sorry to hear this news. Joel contributed a lot to economic measurement.

OTOH, taxpayers with taxable income < 100k (that is, most taxpayers) use the tax tables and may be aware that an increase of $1 in taxable income can cause their tax to increase by up to $12. While not exactly the case addressed by the question, I can see the confusion.

I’n not an economic historian, but this Wikipedia article mentions demobilization of troops and competition for jobs and housing due to the Great Migration. en.wikipedia.org/wiki/Red_Sum...