Results 1 to 10 of about 107 (63)

Asymptotic optimality of sequential designs for estimation [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 18, Issue 1, Page 147-150, 1995., 1995
This paper is concerned with the problem of allocating a fixed number of trials between K independent populations from the exponential family, in order to estimate a linear combination of the means with squared error loss. Introducing independent conjugate priors, a batch sequential procedure is proposed and compared with the optimal.
Kamel Rekab
core   +2 more sources

Asymptotic Optimality of Experimental Designs in Estimating a Product of Means [PDF]

open access: yesInternational Journal of Stochastic Analysis, Volume 3, Issue 1, Page 15-25, 1990., 1990
In nonlinear estimation problems with linear models, one difficulty in obtaining optimal designs is their dependence on the true value of the unknown parameters.
Rekab, Kamel
core   +3 more sources

A Proof of the Bomber Problem's Spend-It-All Conjecture [PDF]

open access: yes, 2010
The Bomber Problem concerns optimal sequential allocation of partially effective ammunition $x$ while under attack from enemies arriving according to a Poisson process over a time interval of length $t$.
Bartroff, Jay
core   +1 more source

Exact properties of Efron's biased coin randomization procedure [PDF]

open access: yes, 2010
Efron [Biometrika 58 (1971) 403--417] developed a restricted randomization procedure to promote balance between two treatment groups in a sequential clinical trial. He called this the biased coin design. He also introduced the concept of accidental bias,
Markaryan, Tigran   +1 more
core   +1 more source

Batched bandit problems [PDF]

open access: yes, 2015
Motivated by practical applications, chiefly clinical trials, we study the regret achievable for stochastic bandits under the constraint that the employed policy must split trials into a small number of batches.
Chassang, Sylvain   +3 more
core   +6 more sources

An asymptotic optimal design

open access: yesInternational Journal of Stochastic Analysis, Volume 4, Issue 4, Page 357-361, 1991., 1991
The problem of designing an experiment to estimate the product of the means of two normal populations is considered. A Bayesian approach is adopted in which the product of the means is estimated by its posterior mean. A fully sequential design is proposed and shown to be asymptotically optimal.
Kamel Rekab
wiley   +1 more source

Asymptotic theorems of sequential estimation-adjusted urn models [PDF]

open access: yes, 2006
The Generalized P\'{o}lya Urn (GPU) is a popular urn model which is widely used in many disciplines. In particular, it is extensively used in treatment allocation schemes in clinical trials.
Cheung, Siu Hung   +2 more
core   +2 more sources

On Optimal Allocation of a Continuous Resource Using an Iterative Approach and Total Positivity [PDF]

open access: yes, 2010
We study a class of optimal allocation problems, including the well-known Bomber Problem, with the following common probabilistic structure. An aircraft equipped with an amount~$x$ of ammunition is intercepted by enemy airplanes arriving according to a ...
Bartroff, Jay   +3 more
core   +2 more sources

Sequential monitoring with conditional randomization tests

open access: yes, 2012
Sequential monitoring in clinical trials is often employed to allow for early stopping and other interim decisions, while maintaining the type I error rate.
Plamadeala, Victoria   +1 more
core   +1 more source

Nonlinear sequential designs for logistic item response theory models with applications to computerized adaptive tests

open access: yes, 2009
Computerized adaptive testing is becoming increasingly popular due to advancement of modern computer technology. It differs from the conventional standardized testing in that the selection of test items is tailored to individual examinee's ability level.
Chang, Hua-Hua, Ying, Zhiliang
core   +1 more source

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