he labor force participation rate of U.S. civilians 55 and older fell to 36.9% last month from 38.1% a year earlier, a shrinkage in the labor market that bolsters the business case for artificial intelligence, RSM US Chief Economist Joe Brusuelas said Monday. he labor force participation rate of U.S. civilians 55 and older fell to 36.9% last month from 38.1% a year earlier, a shrinkage in the labor market that bolsters the business case for artificial intelligence, RSM US Chief Economist Joe Brusuelas said Monday. he labor force participation rate of U.S. civilians 55 and older fell to 36.9% last month from 38.1% a year earlier, a shrinkage in the labor market that bolsters the business case for artificial intelligence, RSM US Chief Economist Joe Brusuelas said Monday. he labor force participation rate of U.S. civilians 55 and older fell to 36.9% last month from 38.1% a year earlier, a shrinkage in the labor market that bolsters the business case for artificial intelligence, RSM US Chief Economist Joe Brusuelas said Monday. he labor force participation rate of U.S. civilians 55 and older fell to 36.9% last month from 38.1% a year earlier, a shrinkage in the labor market that bolsters the business case for artificial intelligence, RSM US Chief Economist Joe Brusuelas said Monday.