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Two Stage and Related Estimators and Their Applications [PDF]

open access: yesThe Review of Economic Studies, 1986
This paper aims to provide a unified treatment of the properties of two stage estimators. General conditions are set forth for consistency, efficiency and correct inferences. Applications of the general theorems are made to models with expectations and diagnostic tests. The general approach frequently enables much simpler derivation of existing results,
openaire   +2 more sources

Two-stage Estimation for Quantum Detector Tomography: Error Analysis, Numerical and Experimental Results

open access: yes, 2021
IEEE Quantum detector tomography is a fundamental technique for calibrating quantum devices and performing quantum engineering tasks. In this paper, a novel quantum detector tomography method is proposed.
Yokoyama, Shota   +7 more
core   +1 more source

Two-stage re-estimation adaptive design: a simulation study

open access: yesEpidemiology, Biostatistics and Public Health, 2013
Background: adaptive clinical trial design has been proposed as a promising new approach to improve the drug discovery process. Among the many options available, adaptive sample size re-estimation is of great interest mainly because of its ability to ...
Francesca Galli, Luigi Mariani
doaj   +1 more source

Two-Stage Channel Estimation for Semi-Passive RIS-Assisted Millimeter Wave Systems

open access: yesSensors, 2022
In a reconfigurable intelligent surface (RIS) assisted millimeter Wave (mmWave) communication system, the channel coefficient increases exponentially with the number of RIS elements which results in expensive pilot overhead.
Chengzuo Peng   +5 more
doaj   +1 more source

Estimation of Tropical Cyclone Intensity via Deep Learning Techniques from Satellite Cloud Images

open access: yesRemote Sensing, 2023
Estimating the intensity of tropical cyclones (TCs) is usually involved as a critical step in studies on TC disaster warnings and prediction. Satellite cloud images (SCIs) are one of the most effective and preferable data sources for TC research. Despite
Biao Tong   +5 more
doaj   +1 more source

The Robust Variance Estimator for Two-stage Models [PDF]

open access: yesThe Stata Journal: Promoting communications on statistics and Stata, 2002
This article discusses estimates of variance for two-stage models. We present the sandwich estimate of variance as an alternative to the Murphy–Topel estimate. The sandwich estimator has a simple formula that is similar to the formula for the Murphy–Topel estimator, and the two estimators are asymptotically equal when the assumed model distributions ...
openaire   +2 more sources

Millimeter-Wave Based Localization Using a Two-Stage Channel Estimation Relying on Few-Bit ADCs

open access: yesIEEE Open Journal of the Communications Society, 2021
Benefiting from the high resolution in beamspace, millimeter wave (mmwave) communication has been regarded as a high-accuracy localization solution, where the location information is embedded in the channel via angle and time delay, for example.
Kunlun Li   +2 more
doaj   +1 more source

Two-stage re-estimation adaptive design: a simulation study

open access: yesEpidemiology, Biostatistics and Public Health, 2022
  Background: adaptive clinical trial design has been proposed as a promising new approach to improve the drug discovery process. Among the many options available, adaptive sample size re-estimation is of great interest mainly because of its ...
Francesca Galli, Luigi Mariani
doaj  

Estimation in Two‐Stage Models with Heteroscedasticity

open access: yesInternational Statistical Review, 2006
SummaryA surprising number of important problems can be cast in the framework of estimating a mean and variance using data arising from a two‐stage structure. The first stage is a random sampling of “units” with some quantity of interest associated with the unit.
openaire   +3 more sources

Complementary analysis for donations—Two-stage estimation.

open access: yes, 2023
Complementary analysis for donations—Two-stage estimation.
Ann-Kathrin Koessler (12469474)   +2 more
core   +1 more source

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