Final answer:
The incorrect statement about illegal immigrants is that employers are required to maintain separate records on health and safety for them. Otherwise, illegal immigrants often hold low-wage jobs, contribute to the economy, and face potential exploitation at work.
Step-by-step explanation:
According to the study released by professors at Tulane University and the University of California at Berkeley, the statement that is not true of illegal immigrants is that the employer needs to maintain separate records on health and safety for illegal migrants working in hazardous occupations. While there are both low-wage-earning immigrants and high-earning immigrant workers, illegal immigrants often are trapped in low-wage jobs, contribute to the economy through their labor, and may face exploitation in the workplace. They are frequently found in jobs such as restaurant and hotel work, lawn care, and janitorial work. This influx into unskilled labor markets tends to lead to lower wages for these jobs, affecting low-skilled U.S. workers who have to compete with them.