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Binary Action Based Estimation of Propensities

Published online by Cambridge University Press:  01 January 2025

George T. Duncan*
Affiliation:
Carnegie-Mellon University
*
Requests for reprints should be sent to George T. Duncan, Department of Statistics, Carnegie-Mellon University, Pittsburgh, PA 15213.

Abstract

An observer is to make inference statements about a quantity p, called a propensity and bounded between 0 and 1, based on the observation that p does or does not exceed a constant c. The propensity p may have an interpretation as a proportion, as a long-run relative frequency, or as a personal probability held by some subject. Applications in medicine, engineering, political science, and, most especially, human decision making are indicated. Bayes solutions for the observer are obtained based on prior distributions in the mixture of beta distribution family; these are then specialized to power-function prior distributions. Inference about log p and log odds is considered. Multiple-action problems are considered in which the focus of inference shifts to the process generating the propensities p, both in the case of a process parameter π known to the subject and unknown. Empirical Bayes techniques are developed for observer inference about c when π is known to the subject. A Bayes rule, a minimax rule and a beta-minimax rule are constructed for the subject when he is uncertain about π.

Information

Type
Original Paper
Copyright
Copyright © 1978 The Psychometric Society

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