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- W4289552826 abstract "A common problem in econometrics, statistics, and machine learning is to estimate and make inference on functions that satisfy shape restrictions. For example, distribution functions are nondecreasing and range between zero and one, height growth charts are nondecreasing in age, and production functions are nondecreasing and quasi-concave in input quantities. We propose a method to enforce these restrictions ex post on point and interval estimates of the target function by applying functional operators. If an operator satisfies certain properties that we make precise, the shape-enforced point estimates are closer to the target function than the original point estimates and the shape-enforced interval estimates have greater coverage and shorter length than the original interval estimates. We show that these properties hold for six different operators that cover commonly used shape restrictions in practice: range, convexity, monotonicity, monotone convexity, quasi-convexity, and monotone quasi-convexity. We illustrate the results with two empirical applications to the estimation of a height growth chart for infants in India and a production function for chemical firms in China." @default.
- W4289552826 created "2022-08-03" @default.
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- W4289552826 date "2018-09-04" @default.
- W4289552826 modified "2023-10-05" @default.
- W4289552826 title "Shape-Enforcing Operators for Point and Interval Estimators" @default.
- W4289552826 doi "https://doi.org/10.48550/arxiv.1809.01038" @default.
- W4289552826 hasPublicationYear "2018" @default.
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