Admissibility in statistical decision theory

Results 91 to 100 of about 119 (119)

Blinded‐Into‐Unblinded Interim Analyses for Clinical Trials With Time‐to‐Event Endpoints

Biometrical Journal, Volume 68, Issue 4, August 2026.
ABSTRACT A large proportion of clinical trials do not meet their recruitment targets. Trials using time‐to‐event endpoints come along with the additional complexity that the amount of available information depends on the number of observed events, which is random for a specified point in time.
Stephen Schüürhuis +4 more
wiley +1 more source

The Huang–Yang Formula for the Low‐Density Fermi Gas: Upper Bound

Communications on Pure and Applied Mathematics, Volume 79, Issue 8, Page 1919-1972, August 2026.
ABSTRACT We study the ground state energy of a gas of spin 1/2$1/2$ fermions with repulsive short‐range interactions. We derive an upper bound that agrees, at low density ϱ$\varrho$, with the Huang–Yang conjecture. The latter captures the first three terms in an asymptotic low‐density expansion, and in particular the Huang–Yang correction term of order
Emanuela L. Giacomelli +3 more
wiley +1 more source

Communications on Pure and Applied Mathematics, Volume 79, Issue 8, Page 1831-1918, August 2026.
ABSTRACT We give a rigorous proof for the existence of a finite‐energy, self‐similar solution to the focusing cubic Schrödinger equation in three spatial dimensions. The proof is computer‐assisted and relies on a fixed point argument that shows the existence of a solution in the vicinity of a numerically constructed approximation.
Roland Donninger, Birgit Schörkhuber
wiley +1 more source

Invariant Measure and Universality of the 2D Yang–Mills Langevin Dynamic

Communications on Pure and Applied Mathematics, Volume 79, Issue 8, Page 1973-2102, August 2026.
ABSTRACT We prove that the Yang–Mills (YM) measure for the trivial principal bundle over the two‐dimensional torus, with any connected, compact structure group, is invariant for the associated renormalised Langevin dynamic. Our argument relies on a combination of regularity structures, lattice gauge‐fixing and Bourgain's method for invariant measures ...
Ilya Chevyrev, Hao Shen
wiley +1 more source

The Weak Core, Partition‐Based Universal Stability, and Their Risk Associations Through A Partial Order

Naval Research Logistics (NRL), Volume 73, Issue 5, Page 810-835, August 2026.
ABSTRACT We are concerned with the stability of a transferable‐utility cooperative (TU) game. First, the concept of core can be weakened so that the blocking of changes is limited to only those with multilateral backings. This principle of consensual blocking, as well as the traditional core‐defining one of unilateral blocking and one straddling in ...
Jian Yang
wiley +1 more source

Tackling hate speech in schools – A systematic review of programme quality from a scientific and school practice perspective

Review of Education, Volume 14, Issue 2, August 2026.
Abstract Hate speech is a global issue. Intentional expressions of group‐related derogation have become more widespread in recent years and they potentially bear negative consequences for individuals, communities and societies. After the internet, the school is a context where children and adolescents perpetrate and/or witness hate speech or become ...
Julia Kansok‐Dusche +3 more
wiley +1 more source

Testing for Contagion in International Financial Markets: To See More, Go Higher

Financial Review, Volume 61, Issue 3, Page 725-763, August 2026.
ABSTRACT Traditional measures of financial contagion rely on correlation shifts, overlooking higher moments such as skewness and kurtosis. We examine contagion during two major financial crises, incorporating lower‐ and higher‐moment measures. We analyze stock market returns from 22 major markets at different frequencies, offering a global perspective ...
Simeon Coleman, Vitor Leone
wiley +1 more source

Large‐Dimensional Cointegrated Threshold Factor Models: The Global Term Structure of Interest Rates

Oxford Bulletin of Economics and Statistics, Volume 88, Issue 4, Page 677-689, August 2026.
ABSTRACT In this paper we extend the two‐level factor model to account for cointegration between group‐specific factors in large datasets. We propose two nonlinear specifications: (i) a threshold vector error correction model (VECM) that allows for asymmetric adjustment across regimes; and (ii) a band VECM that captures state‐dependent adjustment which
Daniel Abreu, Paulo M. M. Rodrigues
wiley +1 more source

Detecting Sparse Cointegration

Oxford Bulletin of Economics and Statistics, Volume 88, Issue 4, Page 726-741, August 2026.
ABSTRACT We propose a two‐step procedure for detecting sparse cointegration in high‐dimensional single‐equation models. First, we employ the adaptive lasso to identify the subset of integrated covariates driving the long‐run equilibrium relationship.
Jesús Gonzalo, Jean‐Yves Pitarakis
wiley +1 more source

How Input Subsidies Boost Food Security in Developing Countries: Micro‐Level Evidence From Zambia

Review of Development Economics, Volume 30, Issue 3, Page 2067-2082, August 2026.
ABSTRACT While previous studies have examined the effects of input subsidies on income and yields, we study their impact on food security, measured through household dietary diversity, a key dimension of nutritional well‐being—examined across specific pathways.
Terence Jude Wood +3 more
wiley +1 more source