Pros

Meta-regression offers a systematic scientific approach to research synthesis and quantitative review of the evidence base.

Meta-regression methods can be used to formally test hypotheses and rival theories.

Meta-regression is particularly useful for explaining sources of the wide variation in reported econometric estimates.

Meta-regression can correct the evidence base for specification bias and reduce the effects of publication selection bias.

Involving simple regression analysis and standard software, with well-established guidelines and protocols, meta-regression is easy to implement.