Immigrant entrepreneurs have become a critical engine of growth for New York City, according to a new study from the Center for an Urban Future. The report, A World of Opportunity: Understanding & Tapping the Economic Potential of Immigrant Entrepreneurs, documents that immigrant entrepreneurs are starting a greater share of new businesses than native-born residents, stimulating growth in sectors from food manufacturing to health care, creating loads of new jobs and transforming once-sleepy neighborhoods into thriving commercial centers.