it was illegal for private schools to have grad student unions until ~2016, as (private) graduate students were not classified as employees. https://www.aaup.o

it was illegal for private schools to have grad student unions until ~2016, as (private) graduate students were not classified as employees. https://www.aaup.org/brief/columbia-university-364-nlrb-no-90-august-23-2016 https://www.aaup.org/brief/columbia-university-364-nlrb-no-9...