Read the paper in its entirety to understand how charters are depleting the resources of public schools without necessarily providing a better quality of education. Diane Ravitch explains: 'This new paper is a major analysis of the effects of charter schools on their host districts. Until now, there has been little attention paid to the ways that the expansion of charter schools affects the budget and policies of the district in which the charters open. Over the past twenty years, the United States has been developing a dual school system of public schools, open to all and responsible for all students who enroll, and charter schools, which are free of most state regulations and free to remove students they don't want. Baker is interested primarily in the fiscal impact of charters but he does consider the disciplinary policies of charters and also their segregating effects.