We derive asymptotic properties of estimators and test statistics to determine - in a grouped data setting - common versus group-specific factors. Despite the fact that our test statistic for the number of common factors, under the null, involves a parameter at the boundary (related to unit...

Underappreciated, Undervalued, and Misunderstood -- The Home Court Advantage -- The Long Haul -- The Titanium Playbook -- The Power of Micro-Verticals -- The Great Amplification Cycle -- Titanium Family Values -- Winning the Talent War -- Sustainability Should be the Last Word -- The Titanium...