FEDS Paper: Lost in Aggregation: Geographic Mismeasurement of Income and Spending
Sinem Hacioglu-Hoke, Leo Feler, and Jack ChylakUsing zip-code median income as a proxy for household income is common in economics but can mask heterogeneity and yield misleading conclusions. Using zip-code median income and self-reported household incomes from a representative panel of 150,000 U.S. households, we decompose average retail spending for 2018-2024. When using self-reported incomes, we observe substantial divergence in spending between low- and high-income households starting in mid-2021.