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Social Media, Web, and Panel Surveys: Using Non- Probability Samples in Social and Policy Research
, 2020 The use of online surveys has grown rapidly in social science and policy research, surpassing more established methods. We argue that a better understanding is needed, especially of the strengths and weaknesses of non-probability online surveys that can ...
V. Lehdonvirta +3 more
semanticscholar +1 more source
Wellcome Open Research, 2020 Protocol non-adherence is common and poses unique challenges in the interpretation of trial outcomes, especially in non-inferiority trials. We performed simulations of a non-inferiority trial with a time-fixed treatment and a binary endpoint in order to:
Yin Mo +3 more
doaj +1 more source
On the probability of cost-effectiveness using data from randomized clinical trials
BMC Medical Research Methodology, 2001 Background Acceptability curves have been proposed for quantifying the probability that a treatment under investigation in a clinical trial is cost-effective. Various definitions and estimation methods have been proposed.
Willan Andrew R
doaj +1 more source
Estimation of Distribution Overlap of Urn Models [PDF]
, 2012 A classical problem in statistics is estimating the expected coverage of a sample, which has had applications in gene expression, microbial ecology, optimization, and even numismatics.
Hampton, Jerrad, Lladser, Manuel E.
core +4 more sources
Annals of Abbasi Shaheed Hospital and Karachi Medical & Dental College, 2020 Objective: To estimate and compare the prevalence of depression among college students in Karachi. The analytical approach was aimed to minimize biases produced by profession, gender, and age of samples on the prevalence rate. Methods: A cross-sectional
Nuzhat Aisha Akram +5 more
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The Egyptian Journal of Radiology and Nuclear Medicine, 2021 Background The proximity of the maxillary sinus floor to the maxillary molar roots increases the probability of oroantral communication on conducting any surgical or endodontic procedure in the involved area.
Esraa Ahmed Eid +2 more
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Posterior contraction rates for support boundary recovery [PDF]
, 2020 Given a sample of a Poisson point process with intensity $\lambda_f(x,y) = n \mathbf{1}(f(x) \leq y),$ we study recovery of the boundary function $f$ from a nonparametric Bayes perspective.
Reiss, Markus, Schmidt-Hieber, Johannes
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Using Perturbed Underdamped Langevin Dynamics to Efficiently Sample from Probability Distributions [PDF]
Journal of statistical physics, 2017 In this paper we introduce and analyse Langevin samplers that consist of perturbations of the standard underdamped Langevin dynamics. The perturbed dynamics is such that its invariant measure is the same as that of the unperturbed dynamics.
A. Duncan, N. Nüsken, G. Pavliotis
semanticscholar +1 more source
Functional Calibration under Non-Probability Survey Sampling
, 2022 Non-probability sampling is prevailing in survey sampling, but ignoring its selection bias leads to erroneous inferences. We offer a unified nonparametric calibration method to estimate the sampling weights for a non-probability sample by calibrating functions of auxiliary variables in a reproducing kernel Hilbert space.
Wang, Zhonglei +2 more
openaire +2 more sources
Interplay between pairing and exchange in small metallic dots
, 2002 We study the effects of the mesoscopic fluctuations on the competition between exchange and pairing interactions in ultrasmall metallic dots when the mean level spacing is comparable or larger than the BCS pairing energy.
A. Di Lorenzo +24 more
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