November 17, 2010. This report shows the big overall immigrant contribution to Long Island’s economy, stressing the diversity of immigrant jobs, but also looking at whether immigrants are displacing U.S.-born workers or lowering wages. For nearly all Long Island residents the answer is no. However, there is reason for concern about African American men with a high school diploma or less. They seem to be losing ground (higher unemployment rates) as immigrant share of the labor force increases. This issue deserves attention despite the fact that unemployment rates on Long Island were too high even before much immigration.