There are a number of Legal Periodicals dedicated to Public Policy.
Sometimes a more pointed search is necessary when looking for strictly legal materials. There are hundreds of legal periodicals that publish articles that argue for policy changes. Use the link below to search in HeinOnline's Law Journal Library.
Select "Publication Title" from the drop-down and enter a basic search terms involving your area of regulation. For example a search for LABOR will locate journals that specifically print articles in that area.
There are a variety of publications and services that collect the statutory laws of the fifty states to compare and contrast the legal solutions taken in different regions.