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EPIC: populace-nz — New Zealand dollar take-up engine on the Axiom stack

Status: Open.

#343 In PolicyEngine/populace;

· MaxGhenis opened on Jul 6, 2026

No take-up modeling on state credits: flat per-return credits overshoot actuals by the full take-up gap (CA YCTC +39%)

Status: Open.

#341 In PolicyEngine/populace;

· PavelMakarchuk opened on Jul 6, 2026

Sparse national-only release never persists input columns for tips/overtime/auto-loan/education/retirement-contribution/casualty/misc bases (absent-from-H5, engine defaults to 0)

Status: Open.

#340 In PolicyEngine/populace;

· PavelMakarchuk opened on Jul 6, 2026

Long-term CPS projections (2026–2100) have no populace replacement — decide rebuild / inherit / retire before #204 closes

Status: Open.

#333 In PolicyEngine/populace;

· MaxGhenis opened on Jul 6, 2026

Declare point-in-time (average-month) semantics for enrollment take-up flags and snapshot-month provenance

Status: Open.

#332 In PolicyEngine/populace;

· daphnehanse11 opened on Jul 6, 2026

Materialize Medicaid and CHIP take-up via anchored count-calibration (ACA stage pattern)

Status: Open.

#331 In PolicyEngine/populace;

· daphnehanse11 opened on Jul 6, 2026

Subtract modeled Medicare Part A premium and Part D IRMAA in the other-premium residual

Status: Open.

#329 In PolicyEngine/populace;

· daphnehanse11 opened on Jul 6, 2026

Export input-mass-parity gate references the raw base, flagging correct calibration gains on PUF-imputed columns

Status: Open.

#327 In PolicyEngine/populace;

· MaxGhenis opened on Jul 6, 2026

Calibration-stage cache/checkpoint identity omits solver config (no solver_config_sha256)

Status: Open.

#326 In PolicyEngine/populace;

· MaxGhenis opened on Jul 6, 2026

Build G: pin-bump validation pass (pe-us 1.752.2 → 1.764.0) before the next release build

Status: Open.

#324 In PolicyEngine/populace;

· MaxGhenis opened on Jul 6, 2026

Assign data-construction inputs added by recent policyengine-us merges (SNAP ABAWD discretionary exemptions, CHIP take-up)

Status: Open.

#323 In PolicyEngine/populace;

· MaxGhenis opened on Jul 6, 2026

CHIP enrollment targets are concept-mismatched: CMS total_chip_enrollment includes M-CHIP; model materializes separate CHIP only (20 states zero-support)

Status: Open.

#321 In PolicyEngine/populace;

· MaxGhenis opened on Jul 6, 2026