The US government let the expanded child tax credit expire ... just as researchers produced a study showing giving parents money might help improve brain development in kids.

This episode was produced by Hady Mawajdeh, edited by Matt Collette, engineered by Paul Mounsey, fact-checked by Laura Bullard and Richard Sima, and hosted by Sean Rameswaram.

Transcript at vox.com/todayexplained  

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