The basics first: what's actually being switched, and why it isn't "broken" English. African American Vernacular English (AAVE) is a real, rule-governed dialect, not a degraded version of standard English -- established by linguist William Labov's landmark 1972 book Language in the Inner City, and later used as expert testimony in a 1979 federal case, Martin Luther King Jr. Elementary School Children v. Ann Arbor School District Board, where Labov's linguistic evidence helped establish that AAVE's systematic grammatical features (like habitual "be") were creating real barriers to literacy instruction when teachers treated the dialect as simply wrong instead of different. Code-switching, in this context, means moving fluently between that dialect (or its cultural register more broadly) and the standard, institutional English that professional, academic, and civic spaces default to -- a real linguistic skill, not a deficiency being corrected.
The point underneath the statistics: this gets misattributed to the wrong cause, and the real cause is older than any of the people carrying the burden today. The easy, common explanation for why this burden falls where it does reaches for poverty, family structure, or a vague "disinterest" in institutional norms -- circumstantial factors, fixable in theory by enough individual effort. That explanation doesn't survive contact with the data above: the burden rises with education and income, not falls, which rules out poverty as the load-bearing cause. Neither does it survive contact with a simpler test -- size, intellect, and achievement don't neutralize it for the people actually carrying it, the way those same traits reliably do for others in the identical room. The actual root sits further back, in the country's own founding documents: the Constitution of 1787 extended its rights and its default assumption of full personhood to property-owning white men, explicitly and by design -- not to women, not to enslaved or free Black Americans, both left entirely outside its "We the People." See who created whom and why these fields were never separate from American history to begin with for the fuller documentary record of that exclusion. Code-switching's cost, measured two centuries later, is a live downstream effect of a structural decision made at the country's founding -- not a modern social pathology with a modern social fix.
Why the register choice itself is the tell. "No fronting" and "do not pretend" can carry the identical underlying claim -- don't manufacture confidence you don't actually have. Only one of those two phrasings is legible inside a published paper, a courtroom filing, or a formal institutional record. That isn't a comment on which phrase is more correct. It's a fact about which communities' language gets treated as the neutral, default register everyone else has to translate into -- and translating fluently, correctly, every time, without the switch itself being visible to the room, is the actual labor the research above is measuring.
Most people never learn any of this, and that gap has a cause too, not just an effect. Most Americans move through daily life never encountering the founding-document exclusion above, the Labov/Ann Arbor case, or the actual cost this piece measures -- not because the record doesn't exist, but because the country's own civics curriculum was never funded to teach it. See three guardrails, and why they're not holding for the actual number: the federal government spends roughly $50 per student per year on STEM education and about 50 cents on civics, a hundred-to-one gap traced to a specific 2010 congressional funding shift. And see why these fields were never separate from American history to begin with for what it took to get even a partial version of this history taught anywhere: a 133-day student strike at San Francisco State in 1968-69, the longest in US history, to force the country's first Black Studies department into existence at all. Not knowing this isn't a personal failure of curiosity on the part of the person standing in front of someone carrying this cost. It's the predictable result of a funding decision and a curriculum fight, both real, both dated, both traceable -- the same kind of structural cause as everything else in this piece, one layer further back.
The cost measured in this piece is the downside of the same mechanism this site traces as an upside elsewhere -- see absorbing and unleashing talent is what built America for what happens, economically, once a constraint like this one actually lifts.