HIGHLIGHTS
- who: World Bank Group from the (UNIVERSITY) have published the paper: World Bank Document, in the Journal: (JOURNAL)
- what: In the empirical estimation the authors determine the sign of each factor by requiring that the loading of the respective group's largest country be positive .
- future: A recently-developed alternative which the authors shall follow below builds on an extension of the principal component approach to multi-level models see e_g Wang Breitung and Eickmeier and Choi et al .
SUMMARY
Is block-diagonal, with the m-th block containing . . .
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