In 1973 , he received his Ph. D in government from Harvard University .
One of his professors at Cornell was Vladimir Nabokov , for whom Epstein worked part - time advising the writer on which recently released films he should see .
In 1973 , Epstein received Epstein 's Ph. D in government from Harvard University .
One of his professors at Cornell was Vladimir Nabokov , for whom Epstein worked part - time advising the writer on which recently released films he should see .