[3][4] She became a writer and, later, a senior editor of the widely circulated TV Guide magazine in the 1960s and 1970s, where she wrote celebrity profiles, political columns and editorials.
In her editorials for TV Guide, Efron criticized what she saw as liberal media bias, and she defended conservative politicians Barry Goldwater and Ronald Reagan.
Efron and other columnists writing in TV Guide like Kevin Phillips and Pat Buchanan advocated the elimination of the Fairness Doctrine by the Federal Communications Commission, in order to permit conservative viewpoints greater access to the airwaves.
She was a contributing editor to Reason magazine from the 1970s until her death in 2001, where she wrote psychological studies of former President Bill Clinton and Supreme Court Justice Clarence Thomas.
The latter prompted Justice Thomas to declare that Efron had been the "only person" to understand what was going through his mind during the hearings that made him a household name, according to Reason editor Virginia Postrel.