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Intermediate sumsquares overflow loses finite variance and Welch results in weightstats

type-bug

Status: Open.

#10252 In statsmodels/statsmodels;

· tasuku-kobayashi opened on Sep 14, 2026

BUG: CovDetMCD/CovDetS/CovDetMM raise ValueError when nobs < 2*k_vars + 4

Status: Open.

#10241 In statsmodels/statsmodels;

· subsriram opened on Sep 10, 2026

BUG: "lbfgs" optimizer in MixedLM: fixed effects silently returned as 0.0 when Var(RE) falls below tol in get_fe_params but returing convergence "true" when using l

type-bug

Status: Open.

#10239 In statsmodels/statsmodels;

· BastiLi opened on Sep 8, 2026

ENH: numerical overlap and balance diagnostics for TreatmentEffect

Status: Open.

#10234 In statsmodels/statsmodels;

· kirilklein opened on Sep 5, 2026

ENH: GLM outcome models in TreatmentEffect (part of #8987)

type-enh

Status: Open.

#10227 In statsmodels/statsmodels;

· kirilklein opened on Sep 2, 2026

ENH: effect_group (ATET/ATC) for TreatmentEffect.aipw and aipw_wls

type-enh

Status: Open.

#10226 In statsmodels/statsmodels;

· kirilklein opened on Sep 1, 2026

ENH: overlap diagnostics and explicit trimming for TreatmentEffect

type-enh

Status: Open.

#10224 In statsmodels/statsmodels;

· kirilklein opened on Sep 1, 2026

MAINT: Remove hasattr/getattr anti-patterns by initializing attributes to None

maintenance

type-task

Status: Open.

Task

#9880 In statsmodels/statsmodels;

· Aniketsy opened on Jul 1, 2026

Broken links on Examples wiki page

Status: Open.

#9841 In statsmodels/statsmodels;

· Aniketsy opened on Jun 15, 2026

Feature proposal: Johansen cointegration test with Fourier-type smooth nonlinear trends (Kurita & Shintani, 2025)

Status: Open.

#9806 In statsmodels/statsmodels;

· merwanroudane opened on May 23, 2026

BUG/ENH (sandbox) OnewayLS pairwise comparison - effective degrees of freedom

comp-regression

comp-stats

Status: Open.

#9777 In statsmodels/statsmodels;

· josef-pkt opened on Apr 1, 2026

MAINT: Improve codebase maintainability and fix Kalman filter corner case

Status: Open.

#9740 In statsmodels/statsmodels;

· un1u3 opened on Jan 13, 2026