One ingredient in the economy's special sauce: a sudden, salutary rebound in net immigration, which soared in 2022 to more than a million people, its highest level since 2017. We don't know whether this rebound will last, but it has been really helpful. It's an exaggeration, but one with some truth, to say that immigrants are saving the U.S. economy. (NYT 2024.4.13)