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Backdate California State Supplement (SSP) parameters#7787

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mattunrath:backdate-ca-ssp
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Backdate California State Supplement (SSP) parameters#7787
mattunrath wants to merge 2 commits intoPolicyEngine:mainfrom
mattunrath:backdate-ca-ssp

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@mattunrath mattunrath commented Mar 17, 2026

Summary

Backdates all 10 California State Supplementary Payment (SSP) parameter files from 2002 to 2024, filling the 34-year gap between the original 1991 and 2025 entries.

Closes #7786

Changes

  • Parameters backdated: 10 files, ~200 date entries added
  • Aged/disabled (single & married): Complete 2002-2025 with mid-year budget cut entries (May 2009, Jul 2009, Nov 2009, Jun 2011)
  • Blind (single, one-blind couple, two-blind couple): 2002-2011 from SSA sources, 2012-2025 via verified COLA chain
  • Dependent, food allowance, medical facility, out-of-home care: Same pattern with deduplicated unchanged values
  • References added: SSA State Assistance publications, CDSS legislative briefings, SSA POMS SI 01415.055
  • Tests updated: 13 existing tests corrected from 1991 fallback values to actual 2024 values; 5 historical test cases added (2005, 2010, 2017, 2022)

Regulatory Sources

Data Confidence

Parameter 2002-2011 2012-2025 Confidence
Aged/disabled (single & married) Primary (SSA + CDSS) Primary (CDSS briefings) High
Blind (3 files) Primary (SSA) Verified COLA chain High
Dependent Primary (SSA) Verified COLA chain High
Food allowance (2 files) Primary (SSA) Verified COLA chain High
Medical facility Primary (SSA) Estimated COLA chain Medium
Out-of-home care Primary (SSA) 2023-2025 only (different schedule) Low for 2012-2022

Test Plan

  • All 247 CA CDSS tests pass (including CAPI integration)
  • Historical tests verify 2005, 2010, 2017, 2022 values
  • make format passes

🤖 Generated with Claude Code

mattunrath and others added 2 commits March 16, 2026 21:34
Add historical payment standards for all 10 CA SSP parameter files,
filling the 34-year gap between the original 1991 and 2025 entries.
Includes mid-year budget cut entries (2009, 2011) and COLA chain
computed values verified against POMS 2023 and DHCS 2025 anchors.

Sources: SSA State Assistance publications (2002-2011), CDSS
legislative briefings (Dec 2020, Fall 2023, Fall 2024), SSA POMS
SI 01415.055, CDSS ACL 03-04.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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codecov bot commented Mar 18, 2026

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.31%. Comparing base (19ec305) to head (34990e7).
⚠️ Report is 24 commits behind head on main.

Additional details and impacted files
@@             Coverage Diff              @@
##              main    #7787       +/-   ##
============================================
- Coverage   100.00%   75.31%   -24.69%     
============================================
  Files            3     3909     +3906     
  Lines           33    56401    +56368     
  Branches         0      270      +270     
============================================
+ Hits            33    42481    +42448     
- Misses           0    13876    +13876     
- Partials         0       44       +44     
Flag Coverage Δ
unittests 75.31% <ø> (-24.69%) ⬇️

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Backdate California State Supplement (SSP) parameters

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