Merge pull request #913 from PolicyEngine/nikhilwoodruff/issue912

Add Winter Fuel Allowance

changelog_entry.yaml

@@ -0,0 +1,4 @@
+- bump: minor
+  changes:
+    added:
+    - Winter Fuel Allowance.

policyengine_uk/parameters/gov/dwp/winter_fuel_payment/amount/higher.yaml

@@ -0,0 +1,8 @@
+values:
+  2000-01-01: 300
+metadata:
+  unit: currency-GBP
+  label: Winter Fuel Payment higher amount
+  reference:
+    - href: https://www.legislation.gov.uk/uksi/2000/729/regulation/2
+      title: The Social Fund Winter Fuel Payment Regulations 2000

policyengine_uk/parameters/gov/dwp/winter_fuel_payment/amount/lower.yaml

@@ -0,0 +1,8 @@
+values:
+  2000-01-01: 200
+metadata:
+  unit: currency-GBP
+  label: Winter Fuel Payment lower amount
+  reference:
+    - href: https://www.legislation.gov.uk/uksi/2000/729/regulation/2
+      title: The Social Fund Winter Fuel Payment Regulations 2000

policyengine_uk/parameters/gov/dwp/winter_fuel_payment/eligibility/higher_age_requirement.yaml

@@ -0,0 +1,9 @@
+description: Age requirement to qualify for the higher Winter Fuel Payment.
+values:
+  2000-01-01: 80
+metadata:
+  unit: year
+  label: Winter Fuel Payment higher amount age requitement
+  reference:
+    - href: https://www.legislation.gov.uk/uksi/2000/729/regulation/2
+      title: The Social Fund Winter Fuel Payment Regulations 2000

policyengine_uk/parameters/gov/dwp/winter_fuel_payment/eligibility/require_benefits.yaml

@@ -0,0 +1,9 @@
+description: Whether receipt of means-tested benefits is required to qualify for the Winter Fuel Payment.
+values:
+  2000-01-01: false
+metadata:
+  unit: bool
+  label: Winter Fuel Payment means-tested benefits requirement
+  reference:
+    - href: https://www.legislation.gov.uk/uksi/2000/729/regulation/2
+      title: The Social Fund Winter Fuel Payment Regulations 2000

policyengine_uk/parameters/gov/dwp/winter_fuel_payment/eligibility/state_pension_age_requirement.yaml

@@ -0,0 +1,9 @@
+description: Whether individuals must be State Pension Age to qualify for the Winter Fuel Payment.
+values:
+  2000-01-01: true
+metadata:
+  unit: bool
+  label: Winter Fuel Payment State Pension Age requirement
+  reference:
+    - href: https://www.legislation.gov.uk/uksi/2000/729/regulation/2
+      title: The Social Fund Winter Fuel Payment Regulations 2000

policyengine_uk/variables/gov/dwp/WFA.py

@@ -16,4 +16,44 @@ class winter_fuel_allowance(Variable):
     value_type = float
     unit = GBP
 
-    adds = ["winter_fuel_allowance_reported"]
+    def formula(household, period, parameters):
+        age = household.members("age", period)
+        is_SP_age = household.members("is_SP_age", period)
+        wfp = parameters(period).gov.dwp.winter_fuel_payment
+        on_mtb = (
+            add(
+                household,
+                period,
+                [
+                    "pension_credit",
+                    "income_support",
+                    "ESA_income",
+                    "JSA_income",
+                ],
+            )
+            > 0
+        )
+        meets_mtb_requirement = on_mtb | ~wfp.eligibility.require_benefits
+        print(wfp.eligibility.require_benefits)
+        meets_spa_requirement = (
+            household.any(is_SP_age)
+            | ~wfp.eligibility.state_pension_age_requirement
+        )
+        meets_higher_age_requirement = household.any(
+            age >= wfp.eligibility.higher_age_requirement
+        )
+        qualifies_for_higher = (
+            meets_mtb_requirement
+            & meets_spa_requirement
+            & meets_higher_age_requirement
+        )
+        qualifies_for_lower = (
+            meets_mtb_requirement
+            & meets_spa_requirement
+            & ~meets_higher_age_requirement
+        )
+
+        return (
+            wfp.amount.higher * qualifies_for_higher
+            + wfp.amount.lower * qualifies_for_lower
+        )