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arxiv: 2605.15428 · v1 · pith:QDPGSJFVnew · submitted 2026-05-14 · 📊 stat.ME

Modeling Misclassification in Spousal Violence Reporting: Evidence from Bayesian Quantile Regression

Pith reviewed 2026-05-19 15:10 UTC · model grok-4.3

classification 📊 stat.ME
keywords bayesian quantile regressionmisclassificationbinary outcomesspousal violencemcmclatent variablefalse negativefalse positive
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The pith

Bayesian quantile regression for misclassified binary outcomes introduces a latent true response and models false negative and false positive errors separately.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper develops a Bayesian quantile regression method tailored to binary outcomes that suffer from misclassification, such as self-reports of spousal violence. It adds an unobserved true response variable and parameterizes the probabilities of false negatives and false positives in the observed reports. A dedicated MCMC algorithm estimates all components together. Simulations across different misclassification rates and priors show gains over standard models that ignore errors. When fit to real spousal violence data, the approach finds underreporting exceeds overreporting at most quantiles and produces different estimates for how employment and household wealth relate to the outcome.

Core claim

A Bayesian quantile regression framework for misclassified binary outcomes introduces a latent true response and explicitly models false negative and false positive reporting errors. Estimation uses a novel Markov chain Monte Carlo algorithm. Simulations under varying priors and misclassification rates show better performance than models that ignore misclassification. Applied to self-reported spousal violence data, the method indicates underreporting exceeds overreporting across quantiles and that correcting for misclassification can change substantive conclusions about associations with employment status and household wealth after adjusting for socio-demographic factors.

What carries the argument

A latent true binary response variable together with separate parameters for false-negative and false-positive misclassification probabilities, estimated jointly by a custom MCMC sampler inside the Bayesian quantile regression.

Load-bearing premise

Misclassification rates for underreporting and overreporting can be identified and estimated separately from the quantile-specific covariate effects without destabilizing the MCMC procedure.

What would settle it

Apply the model to a dataset where true misclassification rates are known from an external validation study and check whether the corrected quantile estimates recover the known underlying associations more closely than an uncorrected model.

Figures

Figures reproduced from arXiv: 2605.15428 by James Stamey, Joon Jin Song, Mohammad Arshad Rahman, Yoo-Mi Chin.

Figure 1
Figure 1. Figure 1: Representative trace plots of the parameters in the misclassification model, based [PITH_FULL_IMAGE:figures/full_fig_p038_1.png] view at source ↗
read the original abstract

Quantile regression extends regression analysis beyond the conditional mean, providing a richer characterization of covariate effects across the outcome distribution. For sensitive binary outcomes, however, misclassification due to underreporting can substantially bias inference. We propose a Bayesian quantile regression framework for misclassified binary outcomes that introduces a latent true response and explicitly models false negative and false positive reporting errors. Estimation is performed through a novel Markov chain Monte Carlo (MCMC) algorithm. Simulation studies under varying prior specifications and misclassification rates demonstrate improved performance over models that ignore misclassification. We apply the method to self-reported spousal violence data, examining associations with employment status and household wealth while adjusting for socio-demographic factors. The results indicate that underreporting exceeds overreporting across quantiles and that accounting for misclassification can change substantive conclusions.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

3 major / 2 minor

Summary. The manuscript proposes a Bayesian quantile regression framework for binary outcomes subject to misclassification. It introduces a latent true response variable and explicitly parameterizes false-negative and false-positive reporting probabilities, with estimation via a novel MCMC algorithm. Simulation studies under different prior specifications and misclassification rates are used to demonstrate improved performance relative to models that ignore misclassification. The method is applied to self-reported spousal violence data to examine associations with employment status and household wealth (adjusting for socio-demographics), concluding that underreporting exceeds overreporting across quantiles and that accounting for misclassification alters substantive conclusions.

Significance. If the central claims hold, the work provides a useful methodological extension for handling misclassification in quantile regression for sensitive binary outcomes, which is relevant for social-science applications involving underreporting. The explicit separation of latent true responses from observed misclassified data, combined with MCMC estimation, offers flexibility across quantiles. Simulation evidence and the empirical application to spousal violence data are presented as demonstrating practical impact on inferences about employment and wealth effects.

major comments (3)
  1. [§2] §2 (model specification), observed-data likelihood: the mixture form P(observed=1) = (1−FN)·P(true=1|X,τ) + FP·(1−P(true=1|X,τ)) does not establish separate identification of the misclassification rates from the quantile-specific coefficients when FN or FP are permitted to depend on the same covariates (employment, wealth) that enter the quantile model; the paper provides no formal identification argument or sensitivity checks for this case, which is load-bearing for the claim that real-data conclusions change after adjustment.
  2. [Simulation studies] Simulation studies section: performance is reported as 'improved' under varying misclassification rates, but the design does not include scenarios in which FN/FP rates covary with the same covariates as the main quantile effects (precisely the pattern expected in spousal-violence reporting); without this check, the simulation results do not directly support robustness of the application findings.
  3. [Application] Application results: the statement that 'accounting for misclassification can change substantive conclusions' is not accompanied by side-by-side tables or figures comparing quantile coefficient estimates (and their uncertainty) with versus without the misclassification adjustment; this weakens the empirical claim.
minor comments (2)
  1. [Methods] The abstract and methods describe the MCMC algorithm as 'novel' without a clear statement of what distinguishes it from standard data-augmentation or Metropolis-within-Gibbs schemes for binary quantile regression; a short comparison paragraph would improve clarity.
  2. [Simulations] Table or figure captions for the simulation results should report quantitative metrics (bias, RMSE, coverage) with standard errors or intervals rather than qualitative statements of improvement.

Simulated Author's Rebuttal

3 responses · 0 unresolved

We thank the referee for their constructive and detailed comments, which have prompted us to strengthen several aspects of the manuscript. We respond to each major comment below.

read point-by-point responses
  1. Referee: §2 (model specification), observed-data likelihood: the mixture form P(observed=1) = (1−FN)·P(true=1|X,τ) + FP·(1−P(true=1|X,τ)) does not establish separate identification of the misclassification rates from the quantile-specific coefficients when FN or FP are permitted to depend on the same covariates (employment, wealth) that enter the quantile model; the paper provides no formal identification argument or sensitivity checks for this case, which is load-bearing for the claim that real-data conclusions change after adjustment.

    Authors: We acknowledge that separate identification of covariate-dependent misclassification probabilities from the quantile coefficients is not automatic and requires careful justification. In the submitted manuscript FN and FP are specified as constants (independent of covariates), which sidesteps the issue for the main results; however, to support the broader claim that adjustment alters substantive conclusions, we will add an explicit identification discussion in Section 2. This will clarify the role of the Bayesian prior structure and the quantile-specific modeling in aiding separation. We will also include sensitivity analyses in which FN and FP are allowed to depend on employment and wealth, reporting how the quantile coefficient estimates change under these specifications. revision: yes

  2. Referee: Simulation studies section: performance is reported as 'improved' under varying misclassification rates, but the design does not include scenarios in which FN/FP rates covary with the same covariates as the main quantile effects (precisely the pattern expected in spousal-violence reporting); without this check, the simulation results do not directly support robustness of the application findings.

    Authors: We agree that the simulation design would be more convincing if it incorporated covariate-dependent misclassification rates matching the application setting. We will expand the simulation studies to include additional scenarios in which FN and FP are generated as functions of employment status and household wealth. Performance metrics (bias, coverage, and interval width) will be reported for these cases and compared against the constant-misclassification and naive models. revision: yes

  3. Referee: Application results: the statement that 'accounting for misclassification can change substantive conclusions' is not accompanied by side-by-side tables or figures comparing quantile coefficient estimates (and their uncertainty) with versus without the misclassification adjustment; this weakens the empirical claim.

    Authors: We accept that direct visual and tabular comparisons are needed to substantiate the claim. In the revised manuscript we will add a new table (and accompanying figure) that reports posterior means and 95% credible intervals for the employment and wealth coefficients at each quantile under both the proposed misclassification-adjusted model and the standard quantile regression model that ignores misclassification. This will allow readers to see precisely where and by how much the inferences differ. revision: yes

Circularity Check

0 steps flagged

No circularity: new latent-variable Bayesian quantile model with MCMC estimation is self-contained

full rationale

The paper defines a Bayesian quantile regression model for binary outcomes subject to misclassification by introducing a latent true response variable whose quantiles are modeled via covariates, then layering separate false-negative and false-positive probabilities to generate the observed data. Estimation proceeds via a custom MCMC algorithm whose target is the joint posterior of the quantile coefficients, misclassification parameters, and latent indicators. Performance is assessed on simulated data generated under known misclassification rates and on real spousal-violence survey data. None of the reported quantities (quantile effects, under- versus over-reporting rates, or changes in substantive conclusions) are obtained by fitting a parameter to a subset of the target data and then relabeling that fit as a prediction; no self-citation supplies a uniqueness theorem or ansatz that the present derivation merely renames; and the simulation design is external to the fitted values. The derivation therefore remains independent of its own outputs.

Axiom & Free-Parameter Ledger

1 free parameters · 1 axioms · 0 invented entities

Only the abstract is available, so the ledger is necessarily incomplete. The model introduces a latent true response variable and misclassification probability parameters that function as free parameters estimated via MCMC; the key domain assumption is that reporting errors are separable from the quantile effects and can be identified from the observed data.

free parameters (1)
  • false negative and false positive rates
    These are explicitly modeled as parameters that must be estimated or given priors to correct for misclassification in the binary outcome.
axioms (1)
  • domain assumption A latent true binary response exists that is related to covariates via quantile regression, and observed reports differ from it only through modeled false negative and false positive errors.
    This premise is required to introduce the latent variable and error structure in the proposed framework.

pith-pipeline@v0.9.0 · 5670 in / 1358 out tokens · 89635 ms · 2026-05-19T15:10:26.911427+00:00 · methodology

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