PROVIDENCE — The decline in Rhode Island’s population for the third straight year, as estimated by the U.S. Census Bureau, is being driven by the migration of young, college-educated people looking for better job opportunities in other states, according to experts. Losing these skilled people is an alarming trend, says University of Rhode Island economist Leonard Lardaro. He warns that a lack of educated people of working age makes it more difficult to attract high-tech companies, and their jobs, to Rhode Island. In a year in which the U.S. population topped 300 million for the first time, Rhode Island was...