"Animal House" was a great box office success despite its limited production costs and started an industry trend, inspiring other comedies such as "Porky's", the "Police Academy" films, the "American Pie" films, "Up the Academy" (made by their rival magazine company: MAD), and "Old School" among others. One writer suggested, half-seriously, that the film's impact was such that future college students seeking to emulate Delta House's antics in real life lead to "a drop of American college students’ GPA's an average of .18 grade points, per semester." Belushi became the most successful male comedy star in the world until his 1982 death; Bacon also became a star, and he, Matheson, and Allen are among those who have had lengthy acting careers. Reitman, Landis, and Ramis became successful filmmakers; Landis' use of dramatic actors and soundtrack to make the comedy believable became the traditional approach for film comedies.