As with the PSP, we first conduct a series
of randomization checks. We predict a set of
pretreatment characteristics (e.g., mother’s race,
mother’s number of siblings, grandmother’s
education, etc.). Since all these variables were
determined before the younger sibling was born,
if the gender of the younger sibling is randomly
assigned, it should have no relationship with
these variables. Having a younger sister indeed
predicts none of these variables in the NLSY, bothfor male and female respondents
As with the PSP, we first conduct a seriesof randomization checks. We predict a set ofpretreatment characteristics (e.g., mother’s race,mother’s number of siblings, grandmother’seducation, etc.). Since all these variables weredetermined before the younger sibling was born,if the gender of the younger sibling is randomlyassigned, it should have no relationship withthese variables. Having a younger sister indeedpredicts none of these variables in the NLSY, bothfor male and female respondents
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