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Reflections on“Lifting the Curse of Dimensionality: Measures of the Labor Legislation Climate in the States During the Progressive Era”

Fishback, Holmes and Allen begin their article " Lifting the Curse of Dimensionality: Measures of the Labor Legislation Climate in the States During the Progressive Era, " by observing that developing summary measures of the policy climate is " one of the most difficult problems in the social sciences. " The balance of the paper is an effort to construct such measures for labor legislation in the United States from 1899-1924, an era of substantial changes in the legal context of labor market transactions. Fishback, Holmes and Allen (hereafter F-H-A) describe the construction of four aggregate measures of the amount of labor legislation in effect in each U.S. state and document the extent of correlation among these measures at different points in time as well as the similarities and differences in the course of their evolution over time.