Tofauti-katika-Tofauti (Diff-in-Diff)
Tofauti-katika-Tofauti ni njia ya kukisia-athari-sababishi inayokadiria athari ya uingiliaji kwa kulinganisha jinsi kikundi cha matibabu na kikundi cha udhibiti vinavyobadilika kwa muda. Ilijulikana sana kupitia utafiti wa Card na Krueger wa 1994 kuhusu kima cha chini cha mshahara na kuendelezwa katika kitabu cha Angrist na Pischke kiitwacho Mostly Harmless Econometrics, inatenga athari ya matibabu kama tofauti kati ya mabadiliko ya kabla-na-baada ya vikundi viwili.
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Method map
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Vyanzo
- Angrist, J. D., & Pischke, J.-S. (2009). Mostly Harmless Econometrics: An Empiricist's Companion. Princeton University Press. ISBN: 978-0691120355
- Card, D., & Krueger, A. B. (1994). Minimum Wages and Employment: A Case Study of the Fast-Food Industry in New Jersey and Pennsylvania. American Economic Review, 84(4), 772-793. link ↗
Jinsi ya kunukuu ukurasa huu
ScholarGate. (2026, June 1). Difference-in-Differences Estimator. ScholarGate. https://scholargate.app/sw/econometrics/difference-in-differences
Which method?
Set this method beside its closest kin and read them side by side — the library lays the books on the table; the choice is yours.
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