PPIC provides data on California as a free service. The PPIC data are not meant to be comprehensive. Rather, we cover areas in which we have expertise and for which data are not readily available from other sources. You may download data from the PPIC Data Depot for use in research, publications, or presentations. We ask that you acknowledge PPIC as the source of the data. For each data set, there is corresponding documentation that provides citation information, details on data construction and original sources, and important information on use and interpretation. For help with these data, please contact us.