Pre-K Now, the advocacy group underwritten by The Pew Charitable Trusts, has put out a helpful, dispassionate report that provides journalists and policy makers with very helpful tools for analyzing the many studies that calculate precise economic benefits of high quality preschool. What I like about the report, by Albert Wat, is that it gives journalists these analytical tools in a way that even non-economists can understand. It's a good resource that you should keep on your desk. (I know, under that enormous pile of other reports that seems like it's always about to slide off into your lap, burying you forever--or, at least until your editor comes over looking for you.)