Description
Measure signed calendar event days relative to a supplied treatment date.
Econometric calculations separate supplied residuals, regressors, weights, restrictions, panel groups and reference periods. One score or moment contribution is not a fitted estimator, and one scalar covariance term is not a standard error. Unit rescaling and event-time arithmetic preserve conventions without establishing model identification or causal interpretation.
Measure signed calendar event days relative to a supplied treatment date.
When to use this tool
Use Event Time Treatment Date Offset when you already have observationDate, treatmentDate and need to measure signed calendar event days relative to a supplied treatment date.
How to use the tool and how it works
- Enter observationDate, treatmentDate. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read eventDay. Use the output convention below.
Parse real UTC YYYY-MM-DD dates; return observationDate-treatmentDate in days, with treatment date equal to event day zero.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. |
| treatmentDate | Treatment Date | Required. Text; maximum UTF-16 length 8192. Real proleptic Gregorian YYYY-MM-DD; four-digit years 0000-9999 accepted. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| eventDay | Event Day | Required. Safe integer. |
{
"input": {
"observationDate": "2026-11-05",
"treatmentDate": "2026-11-01"
},
"output": {
"eventDay": 4
}
}Limitations and assumptions
- No treatment assignment, exposure timing, comparison group, event-study coefficient or causal effect is inferred.
- 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
Fit and evaluate the full specified model with appropriate data, grouping and uncertainty treatment for inference. Aggregate the required score/moment terms and use the complete covariance calculation; a local residual, cutoff flag or supplied coefficient transformation does not validate the estimator.
References
Similar or alternative tools
- Event Study Omitted Period Label
Record an explicit event-study omitted period and convention.
- Panel Missing Time Gap
Count missing expected steps between ordered panel indices.