What is the difference between the classic meta-analysis (that aggregates effect sizes from a sample of studies to a summary effect size), meta-regression analysis and moderator analysis?
As I understood moderator analysis is used to explain heterogeneity in a meta-analysis by regressing a vector containing the effect sizes of each study on specific variables that could explain the heterogeneity (e.g. publication year,...). But what's the difference between moderator-analysis and meta-regression?
Thanks for your help!