From 1968 to 1978, he and Paul Samuelson participated in the Economics Cassette Series, a biweekly subscription series where the economist would discuss the days' issues for about a half-hour at a time.
Od 1968. do 1978. on i Paul Samuelson sudjelovao u seriji Economics Cassette Series, dvotjednoj serijui u kojoj su ekonomisti raspravljali dnevne probleme oko pola sata.