Here's a recent report released by PACE entitled: "Beyond the Numbers: Understanding California's High School Dropouts".
Six of California’s largest urban school districts have joined together in the Partnership for Urban Education Research (PUER), to address the most pressing issues in urban education. The six PUER districts have agreed to work together to increase data availability, enhance internal research capacity, and promote collaboration and information sharing across district lines for the benefit of their students. PUER seeks to build a partnership in which participating districts can use their collective research capacity to carefully evaluate their own instructional programs and practices. In a new report, six PUER school districts—Fresno Unified School District (FUSD), Long Beach Unified School District (LBUSD), Los Angeles Unified School District (LAUSD), Sacramento City Unified School District (SCUSD), San Diego Unified School District (SDUSD), and San Francisco Unified School District (SFUSD)—joined efforts to identify opportunities for improving the current dropout reporting system, and to review district efforts to reduce dropout rates. The PUER districts are working with PACE to review and publish their research.