Household and individual survey data, through topcoding high-income respondents, made the rapid growth of top incomes unobservable until tax data were incorporated into the data infrastructure.

Evidence (1)

What counts as productive? Redefining ‘producers’ in economic discourse, 1890–1960 — Conceptual framework: discursive demarcations, material boundary work, and statistical representations

it became impossible to observe the rapid growth of incomes at the top of the earnings distribution

https://doi.org/10.1080/03085147.2024.2404355#unit-2-p7

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