Extending Fisher's measure of information
Extending Fisher's measure of information
复制标题
扩展费舍尔的信息测量
DOI:
10.1093/biomet/68.3.695
复制
发表时间:
1981
期刊:
影响因子:
2.7
通讯作者:
P. Ferreira
中科院分区:
文献类型:
--
作者:
P. Ferreira
SUMMARY This note investigates possible-extensions of Fisher's measure of information to the case where there is prior knowledge. parameter space. We assume that 0 = (a, b), a real open interval, finite or not. Further, we assume that a proper prior density e(0) exists and we denote by 5(0 j x) oc p(x j 0) e(0) the corresponding posterior density function. The expectations with respect to the likelihood, prior and posterior distributions are denoted by E,I0, Eo and Eo0I, respectively. The marginal density of the data is denoted by q(x). Further, in the following we require some regularity conditions, basically differentiability of p(x I 0) and 6(0) with respect to 0 and convergence and interchangeability of some integrals and limits. If 8(x) is a point estimate of 0 and iff (x, 0) = p(x I 0) e(0), then it follows that