Add NJ budget housing reforms

changelog.d/7763.added.md

@@ -0,0 +1 @@
+Added NJ StayNJ and ANCHOR budget housing reforms as separately toggleable contributed reforms.

policyengine_us/parameters/gov/contrib/states/nj/anchor/homeowner/senior/amount/lower_income.yaml

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+description: >-
+  New Jersey reduces the ANCHOR senior homeowner lower-income benefit to this amount
+  after the $250 bonus expires following FY2026.
+values:
+  2027-01-01: 1_500
+
+metadata:
+  unit: currency-USD
+  period: year
+  label: NJ ANCHOR senior homeowner lower-income amount (post-bonus)
+  reference:
+    - title: P.L. 2023, c.75, Section 15 - ANCHOR Senior Bonus (sunset FY2026)
+      href: https://pub.njleg.state.nj.us/Bills/2022/PL23/75_.PDF#page=11
+    - title: ANCHOR Program - How Benefits Are Calculated
+      href: https://www.nj.gov/treasury/taxation/anchor/calculated.shtml

policyengine_us/parameters/gov/contrib/states/nj/anchor/homeowner/senior/amount/upper_income.yaml

@@ -0,0 +1,15 @@
+description: >-
+  New Jersey reduces the ANCHOR senior homeowner upper-income benefit to this amount
+  after the $250 bonus expires following FY2026.
+values:
+  2027-01-01: 1_000
+
+metadata:
+  unit: currency-USD
+  period: year
+  label: NJ ANCHOR senior homeowner upper-income amount (post-bonus)
+  reference:
+    - title: P.L. 2023, c.75, Section 15 - ANCHOR Senior Bonus (sunset FY2026)
+      href: https://pub.njleg.state.nj.us/Bills/2022/PL23/75_.PDF#page=11
+    - title: ANCHOR Program - How Benefits Are Calculated
+      href: https://www.nj.gov/treasury/taxation/anchor/calculated.shtml

policyengine_us/parameters/gov/contrib/states/nj/anchor/in_effect.yaml

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+description: >-
+  New Jersey ANCHOR senior homeowner bonus expiry reform applies if this is true.
+values:
+  0000-01-01: false
+
+metadata:
+  unit: bool
+  period: year
+  label: NJ ANCHOR senior bonus expiry in effect
+  reference:
+    - title: P.L. 2023, c.75, Section 15 - ANCHOR Senior Bonus (sunset FY2026)
+      href: https://pub.njleg.state.nj.us/Bills/2022/PL23/75_.PDF#page=11
+    - title: NJ FY2027 Budget in Brief - ANCHOR Senior Renter Bonus Extension
+      href: https://www.nj.gov/treasury/omb/publications/27bib/BIB.pdf#page=18

policyengine_us/parameters/gov/contrib/states/nj/stay_nj/in_effect.yaml

@@ -0,0 +1,14 @@
+description: >-
+  New Jersey StayNJ budget reform applies if this is true.
+values:
+  0000-01-01: false
+
+metadata:
+  unit: bool
+  period: year
+  label: NJ StayNJ budget reform in effect
+  reference:
+    - title: NJ FY2027 Budget in Brief - Property Tax Relief
+      href: https://www.nj.gov/treasury/omb/publications/27bib/BIB.pdf#page=17
+    - title: Governor Sherrill Presents Fiscal Year 2027 Budget
+      href: https://www.nj.gov/governor/news/2026/20260310b.shtml

policyengine_us/parameters/gov/contrib/states/nj/stay_nj/income_limit.yaml

@@ -0,0 +1,15 @@
+description: >-
+  New Jersey reduces the StayNJ income threshold to this amount under the
+  Governor's FY2027 budget proposal.
+values:
+  2027-01-01: 250_000
+
+metadata:
+  unit: currency-USD
+  period: year
+  label: NJ StayNJ budget reform income limit
+  reference:
+    - title: NJ FY2027 Budget in Brief - Property Tax Relief
+      href: https://www.nj.gov/treasury/omb/publications/27bib/BIB.pdf#page=17
+    - title: P.L. 2023, c.75 - Stay NJ Act
+      href: https://pub.njleg.state.nj.us/Bills/2022/PL23/75_.PDF#page=1

policyengine_us/parameters/gov/contrib/states/nj/stay_nj/max_benefit.yaml

@@ -0,0 +1,15 @@
+description: >-
+  New Jersey caps the StayNJ maximum benefit at this amount under the
+  Governor's FY2027 budget proposal.
+values:
+  2027-01-01: 4_000
+
+metadata:
+  unit: currency-USD
+  period: year
+  label: NJ StayNJ budget reform max benefit
+  reference:
+    - title: NJ FY2027 Budget in Brief - Property Tax Relief
+      href: https://www.nj.gov/treasury/omb/publications/27bib/BIB.pdf#page=17
+    - title: P.L. 2023, c.75 - Stay NJ Act
+      href: https://pub.njleg.state.nj.us/Bills/2022/PL23/75_.PDF#page=1

policyengine_us/reforms/reforms.py

@@ -177,6 +177,12 @@
 from .congress.watca import (
     create_watca_reform,
 )
+from .states.nj.stay_nj import (
+    create_nj_stay_nj_reform,
+)
+from .states.nj.anchor import (
+    create_nj_anchor_reform,
+)
 
 
 from .states.ga.sb520 import (
@@ -346,6 +352,8 @@ def create_structural_reforms_from_parameters(parameters, period):
     ct_hb5009 = create_ct_hb5009_reform(parameters, period)
     ga_sb520 = create_ga_sb520_reform(parameters, period)
     watca = create_watca_reform(parameters, period)
+    nj_stay_nj = create_nj_stay_nj_reform(parameters, period)
+    nj_anchor = create_nj_anchor_reform(parameters, period)
 
     reforms = [
         afa_reform,
@@ -428,6 +436,8 @@ def create_structural_reforms_from_parameters(parameters, period):
         ct_tax_rebate_2026,
         ga_sb520,
         watca,
+        nj_stay_nj,
+        nj_anchor,
     ]
     reforms = tuple(filter(lambda x: x is not None, reforms))
 

policyengine_us/reforms/states/nj/__init__.py

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+from .stay_nj import create_nj_stay_nj_reform, nj_stay_nj_budget_reform
+from .anchor import create_nj_anchor_reform, nj_anchor_budget_reform

policyengine_us/reforms/states/nj/anchor/__init__.py

@@ -0,0 +1,4 @@
+from .nj_anchor_reform import (
+    create_nj_anchor_reform,
+    nj_anchor_budget_reform,
+)

policyengine_us/reforms/states/nj/anchor/nj_anchor_reform.py

@@ -0,0 +1,107 @@
+from policyengine_us.model_api import *
+from policyengine_core.periods import period as period_
+
+
+def create_nj_anchor() -> Reform:
+    class nj_anchor(Variable):
+        value_type = float
+        entity = TaxUnit
+        label = "New Jersey ANCHOR benefit"
+        unit = USD
+        definition_period = YEAR
+        reference = (
+            "https://www.nj.gov/treasury/taxation/anchor/",
+            "https://www.nj.gov/treasury/taxation/anchor/calculated.shtml",
+        )
+        defined_for = "nj_anchor_eligible"
+
+        def formula(tax_unit, period, parameters):
+            p_baseline = parameters(period).gov.states.nj.tax.income.credits.anchor
+            p_reform = parameters(period).gov.contrib.states.nj.anchor
+
+            reform_active = p_reform.in_effect
+
+            gross_income = add(tax_unit, period, ["nj_gross_income"])
+            greater_age = tax_unit("greater_age_head_spouse", period)
+            is_senior = greater_age >= p_baseline.age_threshold
+
+            pays_property_taxes = add(tax_unit, period, ["real_estate_taxes"]) > 0
+            pays_rent = tax_unit("rents", period)
+            is_homeowner = pays_property_taxes & ~pays_rent
+            is_renter = pays_rent & ~pays_property_taxes
+
+            lower_income = gross_income <= p_baseline.homeowner.income_limit.lower
+
+            # Senior homeowner amounts: reform overrides when active
+            baseline_senior_lower = p_baseline.homeowner.senior.amount.lower_income
+            baseline_senior_upper = p_baseline.homeowner.senior.amount.upper_income
+            reform_senior_lower = p_reform.homeowner.senior.amount.lower_income
+            reform_senior_upper = p_reform.homeowner.senior.amount.upper_income
+
+            senior_lower = where(
+                reform_active,
+                reform_senior_lower,
+                baseline_senior_lower,
+            )
+            senior_upper = where(
+                reform_active,
+                reform_senior_upper,
+                baseline_senior_upper,
+            )
+
+            homeowner_senior_amount = where(lower_income, senior_lower, senior_upper)
+
+            # Non-senior homeowner amounts: unchanged from baseline
+            homeowner_non_senior_amount = where(
+                lower_income,
+                p_baseline.homeowner.non_senior.amount.lower_income,
+                p_baseline.homeowner.non_senior.amount.upper_income,
+            )
+            homeowner_amount = where(
+                is_senior,
+                homeowner_senior_amount,
+                homeowner_non_senior_amount,
+            )
+
+            # Renter amounts: unchanged from baseline
+            renter_amount = where(
+                is_senior,
+                p_baseline.renter.senior.amount,
+                p_baseline.renter.non_senior.amount,
+            )
+
+            return where(
+                is_homeowner,
+                homeowner_amount,
+                where(is_renter, renter_amount, 0),
+            )
+
+    class reform(Reform):
+        def apply(self):
+            self.update_variable(nj_anchor)
+
+    return reform
+
+
+def create_nj_anchor_reform(parameters, period, bypass: bool = False):
+    if bypass:
+        return create_nj_anchor()
+
+    p = parameters.gov.contrib.states.nj.anchor
+
+    reform_active = False
+    current_period = period_(period)
+
+    for _ in range(5):
+        if p(current_period).in_effect:
+            reform_active = True
+            break
+        current_period = current_period.offset(1, "year")
+
+    if reform_active:
+        return create_nj_anchor()
+    else:
+        return None
+
+
+nj_anchor_budget_reform = create_nj_anchor_reform(None, None, bypass=True)

policyengine_us/reforms/states/nj/stay_nj/__init__.py

@@ -0,0 +1,4 @@
+from .nj_stay_nj_reform import (
+    create_nj_stay_nj_reform,
+    nj_stay_nj_budget_reform,
+)

policyengine_us/reforms/states/nj/stay_nj/nj_stay_nj_reform.py

@@ -0,0 +1,102 @@
+from policyengine_us.model_api import *
+from policyengine_core.periods import period as period_
+
+
+def create_nj_stay_nj() -> Reform:
+    class nj_staynj_eligible(Variable):
+        value_type = bool
+        entity = TaxUnit
+        label = "New Jersey Stay NJ Property Tax Credit program eligibility"
+        definition_period = YEAR
+        reference = (
+            "https://pub.njleg.state.nj.us/Bills/2022/PL23/75_.HTM",
+            "https://www.nj.gov/treasury/taxation/staynj/index.shtml",
+        )
+        defined_for = StateCode.NJ
+
+        def formula(tax_unit, period, parameters):
+            p_baseline = parameters(period).gov.states.nj.tax.income.credits.staynj
+            p_reform = parameters(period).gov.contrib.states.nj.stay_nj
+
+            reform_active = p_reform.in_effect
+
+            greater_age = tax_unit("greater_age_head_spouse", period)
+            age_eligible = greater_age >= p_baseline.age_threshold
+
+            gross_income = add(tax_unit, period, ["nj_gross_income"])
+            baseline_income_eligible = gross_income < p_baseline.income_limit
+            reform_income_eligible = gross_income < p_reform.income_limit
+            income_eligible = where(
+                reform_active,
+                reform_income_eligible,
+                baseline_income_eligible,
+            )
+
+            pays_property_taxes = add(tax_unit, period, ["real_estate_taxes"]) > 0
+            pays_rent = tax_unit("rents", period)
+            is_homeowner = pays_property_taxes & ~pays_rent
+
+            return age_eligible & income_eligible & is_homeowner
+
+    class nj_staynj(Variable):
+        value_type = float
+        entity = TaxUnit
+        label = "New Jersey Stay NJ Property Tax Credit"
+        unit = USD
+        definition_period = YEAR
+        reference = (
+            "https://pub.njleg.state.nj.us/Bills/2022/PL23/75_.HTM",
+            "https://www.nj.gov/treasury/taxation/staynj/index.shtml",
+        )
+        defined_for = "nj_staynj_eligible"
+
+        def formula(tax_unit, period, parameters):
+            p_baseline = parameters(period).gov.states.nj.tax.income.credits.staynj
+            p_reform = parameters(period).gov.contrib.states.nj.stay_nj
+
+            reform_active = p_reform.in_effect
+
+            property_taxes = add(tax_unit, period, ["real_estate_taxes"])
+
+            max_benefit = where(
+                reform_active,
+                p_reform.max_benefit,
+                p_baseline.max_benefit,
+            )
+            target_benefit = min_(property_taxes * p_baseline.rate, max_benefit)
+
+            anchor_benefit = tax_unit("nj_anchor", period)
+            senior_freeze = tax_unit("nj_senior_freeze", period)
+
+            return max_(target_benefit - anchor_benefit - senior_freeze, 0)
+
+    class reform(Reform):
+        def apply(self):
+            self.update_variable(nj_staynj_eligible)
+            self.update_variable(nj_staynj)
+
+    return reform
+
+
+def create_nj_stay_nj_reform(parameters, period, bypass: bool = False):
+    if bypass:
+        return create_nj_stay_nj()
+
+    p = parameters.gov.contrib.states.nj.stay_nj
+
+    reform_active = False
+    current_period = period_(period)
+
+    for _ in range(5):
+        if p(current_period).in_effect:
+            reform_active = True
+            break
+        current_period = current_period.offset(1, "year")
+
+    if reform_active:
+        return create_nj_stay_nj()
+    else:
+        return None
+
+
+nj_stay_nj_budget_reform = create_nj_stay_nj_reform(None, None, bypass=True)