Description
outcomeDifference = secondOutcome-firstOutcome; regressorDifference = secondRegressor-firstRegressor; residualDifference = outcomeDifference-slope*regressorDifference.
Panel transformations and regression weights depend on entity, period and weighting conventions. Demeaning or differencing a supplied value is separate from fitting fixed effects, validating panel structure or choosing a statistically appropriate weight.
outcomeDifference = secondOutcome-firstOutcome; regressorDifference = secondRegressor-firstRegressor; residualDifference = outcomeDifference-slope*regressorDifference.
When to use this tool
Use First Difference Two Period Error Term when checking one panel transformation or declared observation weight.
How to use the tool and how it works
- Enter firstOutcome, secondOutcome, firstRegressor, secondRegressor, slope. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read outcomeDifference, regressorDifference, residualDifference. Use the output convention below.
outcomeDifference = secondOutcome-firstOutcome; regressorDifference = secondRegressor-firstRegressor; residualDifference = outcomeDifference-slope*regressorDifference.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| firstOutcome | First Outcome | Required. Finite number. |
| secondOutcome | Second Outcome | Required. Finite number. |
| firstRegressor | First Regressor | Required. Finite number. |
| secondRegressor | Second Regressor | Required. Finite number. |
| slope | Slope | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| outcomeDifference | Outcome Difference | Required. Finite number. |
| regressorDifference | Regressor Difference | Required. Finite number. |
| residualDifference | Residual Difference | Required. Finite number. |
{
"input": {
"firstOutcome": 10,
"secondOutcome": 18,
"firstRegressor": 2,
"secondRegressor": 5,
"slope": 2
},
"output": {
"outcomeDifference": 8,
"regressorDifference": 3,
"residualDifference": 2
}
}Limitations and assumptions
- The supplied slope is held fixed. This one two-period model residual omits other covariates, interval scaling, estimation and identification assumptions.
- 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.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use a suitable complete estimator and validated data structure for panel inference, weighting and missing-data treatment.
References
Similar or alternative tools
- Panel Timegap Difference Sign
difference = currentValue-previousValue; elapsed = currentTime-previousTime; result is difference/elapsed when divideByGap, otherwise difference.
- Fixed Effect Within One Cell Term
transformed = value-groupMean, adding grandMean only when addGrandMean is true.