The Program on Education Policy and Governance (PEPG) at Harvard University published a research study titled Changes in the Performance of Students in Charter and District Sectors of U.S. Education: An Analysis of Nationwide Trends. Due to limitations explained in this review, the study fails to advance our knowledge of charter school effectiveness and offers no solid base for policy recommendations regarding whether charters merit more or less investment, nor any insight into what practices and changes might benefit the charter sector.