Unauthorized Men Work Others More; 
Labor force participation differs substantially by sex and across the groups defined by immigration status. Among men ages 18–64, natives are the least likely to be in the civilian non-institutional labor force (83%) followed by legal immigrants (86%) and then by the group most likely to be working—the unauthorized (92%). There appear to be a number of factors associated with these differences. One of the simplest is age. Within this age range for workers, those who are older (e.g., 45–64) are more likely to be retired or disabled and so, not in the labor force. Very few unauthorized fall in this age range, so overall, they are simply more likely to be working.
Unauthorized Men Work Others More;  | Women Work Less Than Others  | Percent in Labor Force, 2004  | Unauthorized Migrants  | 92%  | 86%  | Legal Immigrants  | 83%  | Natives  | 73%  | 64%  | 56%  | Adult Men (18-64)  | Adult Women (18-64) 