Between 2000 and 2008, the Empire State had a net domestic outflow of more than 1.5 million, the biggest exodus of any state, with most hailing from New York City. The departures also have perilous budget consequences, since they tend to include residents who are better off than those arriving. Statewide, departing families have income levels 13% higher than those moving in, while in New York County (home of Manhattan) the differential was even more severe. Those moving elsewhere had an average income of $93,264, some 28% higher than the $72,726 earned by those coming in.
In 2006 alone, that swap meant the state lost $4.3 billion in taxpayer income. Add that up from 2001 through 2008, and it translates into annual net income losses somewhere near $30 billion. That trend is part of a larger march for New York: In 1950 the state accounted for 19% of all Americans, but by 2000 that number had fallen to 7%. The city's main saving grace has been its welcome mat for foreign immigrants, who have helped to replace some of those who flee.
The intelligence of those who saw the light and fled New York is handsomely exceeded by those who would never live there in the first place.