Marco Sunder

Axiomatic arguments for decomposing goodness of fit according to Shapley and Owen values

We advocate the decomposition of goodness of t into contri- butions of (groups of) regressor variables according to the Shapley value or|if regressors are exogenously grouped|the Owen value because of the attractive axioms associated with these values. A wage regression model with German data illustrates the method.

Upward and onward: High-society American women eluded the antebellum puzzle

We analyze archival evidence on the physical stature of 19th-century female US passport applicants. Heights in this group increased markedly at a time when the rest of the population was becoming shorter. While diseases may have affected the physical stature of everyone in the society, the fact that the height of elite women did not decline (and even increased) suggests that their families were wealthy enough to shield them completely from rising price of nutrients.