Transcription of Causal inference using regression on the treatment variable
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Causal inference using regression on the treatment variable
CHAPTER 9 Causal inference using regression on thetreatment Causal inference and predictive comparisonsSo far, we have been interpreting regressionspredictively: given the values of severalinputs, the fitted model allows us to predicty, considering thendata points as asimple random sample from a hypothetical infinite superpopulation or probabilitydistribution. Then we can make comparisons across differentcombinations of valuesfor these chapter and the next considercausal inference , which concerns whatwouldhappento an outcomeyas a result of a hypothesized treatment or a regression framework, the treatment can be written as a variableT:1Ti={1 if unitireceives the treatment 0 if unitireceives the control, or, for a continuous treatment ,Ti= level of the treatment assigned to the usual regression context, predictive inference relates to comparisonsbetweenunits, whereas Causal inference addresses comparisons of different treatments ifapplied to thesameunits.}
In a regression framework, the treatment can be written as a variable T:1 Ti = ˆ 1 if unit i receives the “treatment” 0 if unit i receives the “control,” or, for a continuous treatment, Ti = level of the “treatment” assigned to unit i. In the usual regression context, predictive inference relates to comparisons between
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