In fact, there are signs that the labor market remains to be very solid — something Jerome H. Powell, the Fed chair, acknowledged this week. Other classes that experienced supersize growth throughout 2021 and 2022, including transportation, warehousing and knowledge technology, have been falling again to their prepandemic trends. Another handful of sectors, corresponding to retail, have been largely flat. That development might proceed if larger wages hold bringing people off the sidelines. The number of folks not in the labor drive who want a job has surged in current months, to 5.8 million, suggesting that they may leap back …