And here is a brief summary of her detailed empirical analysis---
"This is an analysis of the unforeseen consequences of the City of Alexandria, Virginia privatizing many services that it has traditionally provided to its homeowners. Alexandria was first settled in the mid-1700s and over the years has been home to the likes of George Washington, Robert E. Lee, Richard Nixon, Gerald Ford, and Jim Morrison, lead singer of The Doors. Today, after three major annexations of land in 1915, 1930, and 1952, Alexandria now occupies 15.6 square miles directly across the Potomac River from the District of Columbia and is home to an estimated 142,000 people, making it one of the more densely populated cities in the United States. On a functional basis, however, Alexandria today is two separate “cities” of relatively equal physical size and population that differ markedly in community structure and political influence. In one of these “cities,” the average homeowner pays their taxes and receives all their services from City Hall. In the other “city,” the average homeowner pays their taxes, but receives only some of their services from City Hall."
Here are two links to the page, in case one doesn't work: