Ferris Bueller may have missed his economics lesson on tariffs the day he cut class, but one of Washington’s biggest trade groups is making sure President Donald Trump and other policymakers don’t. The National Retail Federation is starting an advertising campaign this week featuring actor and commentator Ben Stein, who’s reprising his role as the economics teacher from the 1986 teen comedy “Ferris Bueller’s Day Off,” arguing that tariffs are “B-A-D Economics” and hurt consumers. The NRF declined to say how much it’s spending on the campaign, beyond “six figures.” The group will air a television commercial in Washington on shows including the early-morning “Fox & Friends,” which Trump is known to watch, as well as in digital ads nationwide.