We replicate and extend Sorenson and Sorensen’s (2007) study how corporate demography shapes workforce wage inequality across region-industries by: (i) replicating their original results from Danish regions in 1992-1998 using a close to identical dataset of industry-regions in neighboring Sweden during the same time-period, (ii) extending the study to 2012 to gauge the corporate demography – wage inequality relationship during a period of rapidly increasing inequality, and (iii) expanding the scope of the model by two new measures of organizational form diversity. Our findings suggest a fairly strong test-retest validity, an enhanced effect of corporate demography over time, but that more nuanced measure of organization form diversity do not necessarily enhance the model’s explanatory power.