You could just Google it. - There's https://www.census.gov/topics/income-poverty/poverty/about/history-of-the-poverty-measure.html https://www.census.gov/topic

You could just Google it. - There's https://www.census.gov/topics/income-poverty/poverty/about/history-of-the-poverty-measure.html https://www.census.gov/topics/income-poverty/poverty/about/h... which does say that the Official Poverty Measure is indeed based on food expenses multiplied by three. - On the other hand, there's also https://www.census.gov/library/visualizations/2021/demo/poverty_measure-how.html https://www.census.gov/library/visualizations/2021/demo/pove... which says that there are now two measures: the Official Poverty Measure and the newer Supplemental Poverty Measure that's intended to address some of the problems of the former. Mention of the Supplemental Poverty Measure doesn't seem to appear in the submitted post using a quick Ctrl-F. Draw your own conclusions.