Immigrant-owned businesses employ more than 19 million people and generate $4.8 trillion in revenue, according to the National Immigration Forum, figures that demonstrate the tremendous positive impact immigrants have on the US economy. Immigrants are important business creators, in addition to holding positions in the service, construction, and farming industries as well as in Silicon Valley. "This phenomenon is across all ethnicities and education levels," Dr. Kerr, a professor of entrepreneurship who has been tracking the topic for over ten years, says. "There are many reasons immigrants start more businesses. Among them: They tend to be more daring and less risk averse, considering they were brave enough to migrate here and tolerate change. Many come to the U.S. specifically to start a business. Others face discrimination in the job market and opt to become business owners."