ci mean notvotewoman if education=="Postgraduate degree (MA, MBA, JD, PhD, etc.)" & redgreen=="Red,Green"
ci mean notvotewoman if education=="Postgraduate degree (MA, MBA, JD, PhD, etc.)" & redgreen!="Red,Green"

ci mean notvoteblack if education=="Postgraduate degree (MA, MBA, JD, PhD, etc.)" & redgreen=="Red,Green"
ci mean notvoteblack if education=="Postgraduate degree (MA, MBA, JD, PhD, etc.)" & redgreen!="Red,Green"

tab education
gen grad = 0
tab education, mi
replace grad = 1 if education=="Postgraduate degree (MA, MBA, JD, PhD, etc.)"

gen highquality=0                              // This line of code is from line 286 of the Bateson 2020 code
replace highquality=1 if redgreen=="Red,Green" // This line of code is from line 287 of the Bateson 2020 code

prtest highquality, by(grad)