In the United States today, millions of workers, many of them immigrants and people of colour, are labouring on the very lowest rungs of metropolitan labour markets, with limited prospects for improving the quality of their present positions or advancing to better jobs. It is an unfortunate but true fact that their immigration status, combined with their ethnic and racial origins has perhaps the greatest impact on the jobs they do, the compensation they receive, and the possibilities they have for redress when mistreated by employers, writes Janice Fine.