Issues

• UK: extended-hours usage draw (mean ~15 of 30) leaves free early-years spending at £5.8bn vs DfE £9.9bn

  PolicyEngine/microcosm#1126 · Filter by author vahid-ahmadi opened on Oct 7, 2026

• UK sparse selection: keep household mass, composition, nation shares and per-area ESS at a tractable size — test the target-weight rule and the L2 penalty first, dataset size only if they fall short

  PolicyEngine/microcosm#1124 · Filter by author juaristi22 opened on Oct 7, 2026
  

• UK local build (K=25, 2026-10-06): data-quality defects on the target surface and the spine

  PolicyEngine/microcosm#1123 · Filter by author juaristi22 opened on Oct 7, 2026

• Tax-input coverage gaps surfaced by the reform-validation registry on us-6.2.1 (tracker)

  PolicyEngine/microcosm#1117 · Filter by author PavelMakarchuk opened on Oct 6, 2026

• reform_validation registry: four state rows measure the wrong quantity at policyengine-us 2.2.1 (IA HF1020, MN WFC, ID CTC, CO CTC), and state SPM rate rows need a sampling SE

  PolicyEngine/microcosm#1116 · Filter by author PavelMakarchuk opened on Oct 6, 2026

• UK local-area exports: add the constituency_code_oa, la_code_oa and region_code_oa columns that policyengine.py and the simulation API read, and record the area-code frames in the release manifest

  PolicyEngine/microcosm#1114 · Filter by author juaristi22 opened on Oct 6, 2026

• UK domestic electricity and gas: record why ONS 04.5.1/04.5.2 is preferred over DESNZ × QEP, reconcile the two, and declare the price basis PE-UK should project from

  PolicyEngine/microcosm#1113 · Filter by author vahid-ahmadi opened on Oct 6, 2026
  1

• UK: main_residence_value stops at about £2.8m (about £3.0m in 2026), so there are no homes in the £3.5m+ surcharge bands

  PolicyEngine/microcosm#1112 · Filter by author vahid-ahmadi opened on Oct 6, 2026
  1

• Populate the UK prepayment-meter input from LCFS

  PolicyEngine/microcosm#1110 · Filter by author anth-volk opened on Oct 5, 2026

• Update two stale comments about the export-mass reviewed-exclusion register

  PolicyEngine/microcosm#1108 · Filter by author MaxGhenis opened on Oct 5, 2026

• UK: model landlord property income on the taxable (net of expenses) concept, not rent received

  PolicyEngine/microcosm#1106 · Filter by author vahid-ahmadi opened on Oct 5, 2026
  2

  

• UK: track the defects uk-data is fixing that microcosm still has

  PolicyEngine/microcosm#1095 · Filter by author juaristi22 opened on Oct 2, 2026
  2

  

• US pool: persist weeks_worked now that policyengine-us has no formula for it (SNAP work tests read it since pe-us#9716)

  PolicyEngine/microcosm#1094 · Filter by author DTrim99 opened on Oct 2, 2026

• ACS local release: real-data verification checklist for the first build of the #1019–#1023 stack

  PolicyEngine/microcosm#1093 · Filter by author DTrim99 opened on Oct 2, 2026

• Scottish private-rent targets: PIPR is BRMA-grain, so council cells cannot bind by translation

  PolicyEngine/microcosm#1090 · Filter by author MaxGhenis opened on Oct 2, 2026

• policyengine-uk 2.102.4+ needs policyengine-core 3.32.9+, which the certified US default refuses

  PolicyEngine/microcosm#1086 · Filter by author MaxGhenis opened on Oct 2, 2026
  3

• Overlay UK graph execution results in Orrery exports

  PolicyEngine/microcosm#1080 · Filter by author juaristi22 opened on Oct 1, 2026

• Export country-agnostic Microcosm graphs for Orrery, with the UK as the first consumer

  PolicyEngine/microcosm#1079 · Filter by author juaristi22 opened on Oct 1, 2026

• UK State Pension projection bundle: entitlement sidecar, abroad dataset, manifest and scorecard for PolicyEngine UK

  PolicyEngine/microcosm#1076 · Filter by author MaxGhenis opened on Oct 1, 2026

• UK static aging: ONS 2024-based projection reader and weights-only annual projections to 2050-51

  PolicyEngine/microcosm#1075 · Filter by author MaxGhenis opened on Oct 1, 2026

• Calibrate US federal student loan balances to Federal Student Aid portfolio targets and show them on the dashboard

  PolicyEngine/microcosm#1074 · Filter by author MaxGhenis opened on Sep 30, 2026
  

• Carry SCF education debt into the US build and allocate federal student loan balances to borrowers

  PolicyEngine/microcosm#1073 · Filter by author MaxGhenis opened on Sep 30, 2026
  

• US default has 3.55M more children than PEP V2024: the 15–19 band fits, but ages 15–16 are 40% high and 18–19 are 40% low

  PolicyEngine/microcosm#1070 · Filter by author MaxGhenis opened on Sep 30, 2026

• UK pensions: calibrate State Pension, Pension Credit and pension contributions to the resident administrative facts (PolicyEngine/chronicle#305), pin the State Pension age boundary, fix the pension spine stages, and the engine pieces a State Pension uprating analysis needs

  PolicyEngine/microcosm#1069 · Filter by author juaristi22 opened on Sep 30, 2026
  1

• US pensions: every CPS/PUF/ACS pension dollar lands on the private leaves, so public-pension state exemptions never apply

  PolicyEngine/microcosm#1068 · Filter by author MaxGhenis opened on Sep 30, 2026