United States. Bureau of Economic Analysis. "Real Personal Consumption Expenditures and Personal Income by State, 2020 : Regional Price Parity Methodology Revisions, December 14, 2021, BEA 21-64," Bureau of Economic Analysis (BEA) News Releases (December 14, 2021). https://fraser.stlouisfed.org/title/6148/item/610193/content/pdf/bea_newsreleases_20211214_method-rev, accessed on March 16, 2025.