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| Politikevalueringsplaceboprov× | Difference-in-Differences (Diff-in-Diff)× | |
|---|---|---|
| Fagområde≠ | Kausal inferens | Økonometri |
| Familie | Regression model | Regression model |
| Oprindelsesår≠ | 1990s–2000s | 1994 |
| Ophavsperson≠ | Bertrand, Duflo & Mullainathan (2004 canonical formalization); Imbens & Wooldridge (2009 textbook treatment) | Card & Krueger (canonical 1994 application); Angrist & Pischke (textbook treatment) |
| Type≠ | Falsification / specification check | Causal inference / panel regression |
| Oprindelig kilde≠ | Imbens, G. W., & Wooldridge, J. M. (2009). Recent Developments in the Econometrics of Program Evaluation. Journal of Economic Literature, 47(1), 5-86. DOI ↗ | Angrist, J. D., & Pischke, J.-S. (2009). Mostly Harmless Econometrics: An Empiricist's Companion. Princeton University Press. ISBN: 978-0691120355 |
| Aliasser≠ | placebo test, falsification test, fake treatment test, placebo regression | diff-in-diff, DiD, Farkların Farkı (Diff-in-Diff) |
| Relaterede≠ | 4 | 5 |
| Resumé≠ | A policy evaluation placebo test is a falsification check used in quasi-experimental research to validate a causal identification strategy. The researcher applies the same estimation method to a pseudo-treatment — a time period, group, or outcome where the real policy could not have had an effect — and checks that no spurious effect is detected. A null placebo result builds confidence that the main estimate reflects a genuine causal impact rather than bias or confounding. | Difference-in-Differences is a causal-inference method that estimates the effect of an intervention by comparing how a treatment group and a control group change over time. Made famous by Card and Krueger's 1994 minimum-wage study and developed in Angrist and Pischke's Mostly Harmless Econometrics, it isolates the treatment effect as the difference between the two groups' before-after changes. |
| ScholarGateDatasæt ↗ |
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