With SpaceX shares soaring 20 percent on their first day of trading, the world’s richest person crossed another milestone — one with 13 digits.

© Adrees Latif/Reuters

A cohort of young Millennial and Gen Z politicians have centered their campaigns this year on housing costs, and the divide is more generational than partisan.

© Sophie Park for The New York Times

Elon Musk’s potential new status as a trillionaire demonstrates in real time why there has been such a rapid rise in the concentration of wealth at the top.

© Nicolas Ortega

A.I. tutoring is seductive, but ultimately ineffective.

© Sara Meneses Cuapio for The New York Times

The middle class is larger than you think, and growing.