Human capital has been seen to be a key factor for current and future economic growth. In a broader sense, it appears that we are moving towards a knowledge economy driven by human capital, technological progress and digitalization. However, although this evolution may be a new trend, similar...

Over the course of the 20th century American wages increased by a factor of about 100, while the wages of professional baseball players increased by a factor of 450, but that increase was neither smooth nor consistent. We use a unique and expansive dataset of salaries and performance variables...