Snow that has snarled travel from Georgia to Maine since December has hit the nation’s most populous city hard.

UBS AG economists said a Jan. 12 storm in the eastern U.S. may have shortened U.S. payrolls by as many as 50,000 positions.

The absence of hard data makes it difficult to quantify the snow’s economic impact, said Frank Barconi, chief economist at the Office of City Comptroller John Liu. Tax receipts, unemployment numbers, and passenger traffic at airports and train stations are delayed at least a month, he said.