Results 151 to 160 of about 166,125,689 (271)

Compact Manifolds With Unbounded Nilpotent Fundamental Groups and Positive Ricci Curvature

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT It follows from the work of Kapovitch and Wilking that a closed manifold with nonnegative Ricci curvature has a uniformly almost nilpotent fundamental group. Leftover questions and conjectures, have asked if in this context the fundamental group is actually uniformly almost abelian. The main goal of this work is to construct examples (Mk9,gk)$(
Elia Bruè, Aaron Naber, Daniele Semola
wiley   +1 more source

Structure and Asymptotic Theory for Nonlinear Models with GARCH Errors [PDF]

Nonlinear time series models, especially those with regime-switching and conditionally heteroskedastic errors, have become increasingly popular in the economics and finance literature.
Michael McAleer, Marcelo C. Medeiros, Felix Chan   +2 more
core  

Calibrated Model Criticism Using Split Predictive Checks. [PDF]

J Am Stat Assoc
Li J, Huggins JH.
europepmc   +1 more source

Weak* fixed point property and asymptotic centre for the Fourier-Stieltjes algebra of a locally compact group [PDF]

Journal of Functional Analysis, 2012
Fendler, Gero, Lau, Anthony To-Ming, Leinert, Michael   +2 more
openaire   +2 more sources

Efficiency and Perceptions in Public CSR: An Integrated Efficiency–Perception Analysis of Spanish Defence Delegations

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT Public organisations often experience a discrepancy between improvements in technical efficiency and stakeholders' perceptions of integrity and performance. This study analyses the mechanisms that may underlie this efficiency–perception discrepancy in Spanish Defence Delegations during 2020–2023.
José Solana‐Ibáñez, Manuel Caravaca‐Garratón   +1 more
wiley   +1 more source

Estimating Optimal Site-Specific Individualized Treatment Rules With Limited Data Sharing. [PDF]

Stat Med
Qiao N, Zhang J, Zhan Z.
europepmc   +1 more source

Adapting to Water Scarcity in Mediterranean Greenhouse Agriculture: Insights From Digital Irrigation and Regulated Water Governance in Southeastern Spain

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT Climate‐driven water scarcity is compounding adaptation pressures on Mediterranean greenhouse farming, particularly for small and micro agricultural firms governed by regulated water‐governance systems. This paper analyses differentiated adaptation profiles in Almería (Spain) based on an analysis of farm structure, digital irrigation adoption,
Luis J. Belmonte‐Ureña, Francisco Camacho‐Ferre, Francisco José Castillo‐Díaz   +2 more
wiley   +1 more source

Multitype SIR epidemics among a population partitioned into households with proportionate global mixing. [PDF]

J Math Biol
Ball F, Critcher L.
europepmc   +1 more source

Corporate Social Responsibility and Firm Profitability in South Africa: An Industry‐Level Analysis

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT This study examines the relationship between corporate social responsibility and profit on assets in South Africa using a panel dataset comprising 79 industries observed annually between 2017 and 2024. The study uses an industry‐level dataset which, unlike firm‐level inquiries, purges firm‐level noise and acknowledges the empirical regularity ...
Brian Tavonga Mazorodze
wiley   +1 more source

Alkali-Activated Mortars with Recycled Tyre Rubber Aggregates: A Preliminary Mechanical Study. [PDF]

Materials (Basel)
Costa I, Neves R, Duarte A, Bravo M.
europepmc   +1 more source