We are working on getting more materials up online. It’s a long process, but to start, here are some documents describing the process used in our current round of meta-analyses.

This diagram describes our process. The meta-analyses follow the standard stages: (1) topic selection; (2) a search for relevant papers; (3) screening of papers; (4) data extraction; and (5) data analysis. In addition, we pay attention to (6) dissemination and (7) updating of results, so as to allow our work to serve as a resource for others and improve the overall data quality.

The hyperlinked documents also describe our methodology and coding practices in more detail. The first link, in particular, goes through all the stages represented in the diagram, in turn.