Description
Label a policy observation as before or after a supplied effective date.
Policy analysis depends on declared eligibility bounds, reference periods, indicator direction and resource denominators. A linear phase-in or household weight is an explicit scenario assumption. A preferred-direction change, age predicate or cost contribution does not establish policy effectiveness, causal impact, actual eligibility or the governing legal rule.
Label a policy observation as before or after a supplied effective date.
When to use this tool
Use Policy Exposure Before After Date Tag when you already have observationDate, suppliedEffectiveDate, includeEffectiveAsAfter and need to label a policy observation as before or after a supplied effective date.
How to use the tool and how it works
- Enter observationDate, suppliedEffectiveDate, includeEffectiveAsAfter. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read periodTag. Use the output convention below.
Parse real UTC dates. after means observation>effective, adding equality only when includeEffectiveAsAfter=true; otherwise before.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| observationDate | Observation Date | Required. Text; maximum UTF-16 length 8192. Real proleptic Gregorian YYYY-MM-DD; four-digit years 0000-9999 accepted. |
| suppliedEffectiveDate | Supplied Effective Date | Required. Text; maximum UTF-16 length 8192. Real proleptic Gregorian YYYY-MM-DD; four-digit years 0000-9999 accepted. |
| includeEffectiveAsAfter | Include Effective As After | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| periodTag | Period Tag | Required. Text; maximum UTF-16 length 8192. |
{
"input": {
"observationDate": "2026-11-01",
"suppliedEffectiveDate": "2026-11-01",
"includeEffectiveAsAfter": true
},
"output": {
"periodTag": "after"
}
}Limitations and assumptions
- The date and equality rule are supplied; no actual exposure, legal effectiveness or causal treatment assignment is verified.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
Alternative or Complementary methods
Use the full eligibility or phase-in rule and its source when evaluating a real policy record. For effectiveness questions, use a study design that addresses the comparator, timing and population; local costs or direction flags alone do not supply that evidence.
References
Similar or alternative tools
- Policy Eligibility Age Boundary
Check an age against supplied lower and upper eligibility bounds.
- Policy Review Deadline Source Code
Qualify an explicit policy-review deadline transcription by source.