In one extension of a two-sector AK model, the growth rate of this stock is equal to its own constant marginal productivity.  
The premise that equality removes constraints on accumulating this entity led Galor and Moav to argue that equality stimulated growth during the late Industrial Revolution. In one extension of a two-sector AK model, the growth rate of this stock is equal to its own constant marginal productivity.  A 1985 paper posited that increasing returns to scale on specific forms of this stock could explain the sexual division of labor. Long-term growth in the Uzawa-Lucas model arises from accumulation of this factor. Jacob (*) Mincer developed his namesake regression equation to determine rates of return of investment in this factor. Blau and Kahn found that the gender wage gap is not explained by variation in this factor. Models of this factor's accumulation often include trade-offs with work and leisure. Gary Becker wrote a 1964 book on, for 10 points, what kind of capital that can be improved through on-the-job training or schooling, which includes the skill and knowledge of workers?
The premise that equality removes constraints on accumulating this entity led Galor and Moav to argue that equality stimulated growth during the late Industrial Revolution.
human capital [accept just human after "capital" is mentioned; prompt on capital; prompt on education, schooling, or close synonyms] 