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It's too annoying : who drops out of educational text messaging programs and why
Fricke, Hans; Kalogrides, Demetra; Loeb, Susanna - In: Economics letters 173 (2018), pp. 39-43
Persistent link: https://www.econbiz.de/10012022880
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A simple test for exogeneity in probit, logit, and Poisson regression models
Grogger, Jeff - In: Economics letters 33 (1990) 4, pp. 329-332
Persistent link: https://www.econbiz.de/10001090859