HEMPSTEAD - A recent study found the immigrant population makes up 1 in 5 of Long Island's 2.9 million people, and it says they are having a positive impact on the local economy.

David Dyssegaard Kallick, the author of the study prepared by the Fiscal Policy Institute, says he found that 20 percent of the economic input on Long Island is due to immigrants.

That 20 percent amounts to about $18 billion.

"They are contributing to taxes, they are contributing to these communities and they are contributing as business owners," said Kallick.

According to the study, downtown areas across Long Island have seen a revitalization because of the influx of immigrants.