“…Through a triangulated process of validation, I demonstrate that these measures capture what they intend. They (I) correlate strongly with the actual location of leading firms in the two industries, (2) successfully explain cross-national variation in manufacturing specialization in the two industries, (3) vary over time in ways that correspond to the historical record of the rise and fall of specific national industries, and ( 4) correlate positively with wages in the two industries (Mahutga 20 l 4a;2014b ).…”