Rosholm, Michael - Institute for the Study of Labor (IZA) - 2008
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cifictreatmentimpactsdoesnotadduptothetotaltreatmenteffect, which
could be the case if e.g. specifictreatmentshave’exante’impacts,orifthe
knowledge of being in the treatment … variable. However, this precludes the case in which knowledge of the
experiment can have ex ante effects, hence, in our case …