Are charter schools like polluting industries? That’s a provocative analogy, but two University of Connecticut researchers explore it in a recent paper. They contend that, while some charter schools may help students, the sector needs stronger regulation to prevent harm to students and school districts. “I would argue that, even if there are benefits, that does not give you carte blanche to not regulate or mitigate the harms that occur,” Preston C. Green III, the paper’s lead author, told me.

“The authors describe how a “bubble” happens, how certain populations are targeted, how they clamor to get in to what appears to be a good deal, then stampede out when the bubble bursts. This may be happening now in urban African American communities,” writes Ravitch. “This article is worth your time.”