If the regression of a response variable y on a k-vector of predictors x is denoted g(x)=E(yix), then the average derivative of y on x is defined as S=E(g'), where g'-ag/ax. This paper compares the statistical properties of four estimators of : a "direct" estimator , formed by averaging pointwise kernel estimators of the derivative g'(x); an "indirect"â€¦ (More)

This essay is mainly concerned with Walter Oi's Disneyland problem: pricing a fixed input (admission to the park, or Polaroid cameras) and a variable input (individual rides, or Polaroid film) to maximize profit, though profit-constrained welfare maximization is also treated. The structure of demand in such situations is fully described when customers areâ€¦ (More)

Continuing rapid growth in U.S. gasoline consumption threatens to exacerbate environmental and congestion problems. We use flexible semiparametric and nonparametric methods to guide analysis of household gasoline consumption in 1988 and 1991. The number of licensed drivers has a strong effect on consumption, and including this variable cuts the estimatedâ€¦ (More)