A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. Identifying causal relationships from observational data is not easy. Still, ...

Economic panel data often exhibit cross-sectional dependence, even after conditioning on appropriate explanatory variables. Two approaches to modeling cross-sectional dependence in economic panel data ...

This is a preview. Log in through your library . Abstract This paper proposes a dual-level inefficiency model for analysing datasets with a sub-company structure, which permits firm inefficiency to be ...

WEST LAFAYETTE, Ind. — Companies and governments have regularly invested in solar farms and lost money when weather degradation unexpectedly cut panel lifetime short. As electricity generated from ...