Paradoxes, anomalies and hypotheses -- Union density in a cross-national context -- The evolution of trade unions in the United States and Canada: the emergence of "the gap" in union density -- Social democratic Canada/free market United States -- Attitudes and values: an inverted relationship...

A detailed longitudinal dataset is assembled containing annual performance and biographical data for every player over the entire history of professional major league baseball. The data are then aggregated to the team level for the period 1920-2009 in order to test whether teams built on a more...