Auditing Marketing Budget Allocation with Hindsight Regret

Fuente: arXiv
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Autori principali: Pathak, Nilavra, Jeunen, Olivier, Lambert, Eric
Natura: Preprint
Pubblicazione: 2026
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author Pathak, Nilavra
Jeunen, Olivier
Lambert, Eric
author_facet Pathak, Nilavra
Jeunen, Olivier
Lambert, Eric
contents Organizations routinely make strategic budget allocations under operational constraints, but often lack a principled way to assess whether realized allocations were close to the best feasible choices in hindsight. We present a retrospective auditing framework based on hindsight regret, defined as the opportunity cost of the realized allocation relative to a constraint-faithful benchmark under the same budget and stability guardrails. The framework estimates regime-specific spend--response functions from historical logs, computes feasible hindsight allocations via constrained optimization, and propagates uncertainty through Monte Carlo evaluation to produce regret distributions, expected lift, and probability-of-improvement summaries. This separates allocation inefficiency from uncertainty in the estimated response surfaces. Experiments on real marketing allocation logs show that the framework yields interpretable post-hoc diagnostics and reveals a practical trade-off between allocation flexibility and detectability: moderate feasible reallocations often capture most measurable gain, while larger shifts move into weak-support regions with higher uncertainty. The result is a practical method for auditing historical budget decisions when online experimentation is costly or infeasible.
format Preprint
id arxiv_https___arxiv_org_abs_2604_25977
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Auditing Marketing Budget Allocation with Hindsight Regret
Pathak, Nilavra
Jeunen, Olivier
Lambert, Eric
Econometrics
Artificial Intelligence
Machine Learning
Portfolio Management
H.4.2; G.3; I.2.6; I.2.8; J.4
Organizations routinely make strategic budget allocations under operational constraints, but often lack a principled way to assess whether realized allocations were close to the best feasible choices in hindsight. We present a retrospective auditing framework based on hindsight regret, defined as the opportunity cost of the realized allocation relative to a constraint-faithful benchmark under the same budget and stability guardrails. The framework estimates regime-specific spend--response functions from historical logs, computes feasible hindsight allocations via constrained optimization, and propagates uncertainty through Monte Carlo evaluation to produce regret distributions, expected lift, and probability-of-improvement summaries. This separates allocation inefficiency from uncertainty in the estimated response surfaces. Experiments on real marketing allocation logs show that the framework yields interpretable post-hoc diagnostics and reveals a practical trade-off between allocation flexibility and detectability: moderate feasible reallocations often capture most measurable gain, while larger shifts move into weak-support regions with higher uncertainty. The result is a practical method for auditing historical budget decisions when online experimentation is costly or infeasible.
title Auditing Marketing Budget Allocation with Hindsight Regret
topic Econometrics
Artificial Intelligence
Machine Learning
Portfolio Management
H.4.2; G.3; I.2.6; I.2.8; J.4
url https://arxiv.org/abs/2604.25977