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Refining Public Policies with Machine Learning: The Case of Tax Auditing

Author

Listed:
  • Marco Battaglini
  • Luigi Guiso
  • Chiara Lacava
  • Douglas L. Miller
  • Eleonora Patacchini

Abstract

We study the extent to which ML techniques can be used to improve tax auditing efficiency using administrative data, without the need of randomized audits. Using Italy's population data on sole proprietorship tax returns, audits and their outcome, we develop a new approach to address the so called selective labels problem - the fact that a ML algorithm must necessarily be trained on endogenously selected data. We document the existence of substantial margins for raising revenue from audits by improving the selection of taxpayers to audit with ML. Replacing the 10% least productive audits with an equal number of taxpayers selected by our trained algorithm raises detected tax evasion by as much as 38%, and evasion that is actually payed back by 29%.

Suggested Citation

  • Marco Battaglini & Luigi Guiso & Chiara Lacava & Douglas L. Miller & Eleonora Patacchini, 2022. "Refining Public Policies with Machine Learning: The Case of Tax Auditing," NBER Working Papers 30777, National Bureau of Economic Research, Inc.
    • Handle: RePEc:nbr:nberwo:30777
    Note: PE
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    JEL classification:

    • H2 - Public Economics - - Taxation, Subsidies, and Revenue
    • H20 - Public Economics - - Taxation, Subsidies, and Revenue - - - General
    • H26 - Public Economics - - Taxation, Subsidies, and Revenue - - - Tax Evasion and Avoidance

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