Results 41 to 50 of about 2,197 (146)

A central limit theorem for biased random walks on Galton–Watson trees [PDF]

Probability Theory and Related Fields, 2007
Let ${\cal T}$ be a rooted Galton-Watson tree with offspring distribution $\{p_k\}$ that has $p_0=0$, mean $m=\sum kp_k>1$ and exponential tails. Consider the $λ$-biased random walk $\{X_n\}_{n\geq 0}$ on ${\cal T}$; this is the nearest neighbor random walk which, when at a vertex $v$ with $d_v$ offspring, moves closer to the root with probability ...
Peres, Yuval, Zeitouni, Ofer
openaire   +3 more sources

Navigating Supply Shocks: Sector Resilience and Production Prices Through Stochastic Input–Output Modeling

Mathematical Finance, EarlyView.
ABSTRACT This study develops a novel multivariate stochastic framework for assessing systemic risks, such as climate and nature‐related shocks, within production or financial networks. By embedding a linear stochastic fluid network, interpretable as a generalized vector Ornstein–Uhlenbeck process, into the production network of interdependent ...
Giovanni Amici, Gianluca Fusai, Anna Maria Gambaro, Daniele Marazzina   +3 more
wiley   +1 more source

Zeros of Bessel functions: monotonicity, concavity, inequalities

Le Matematiche, 2007
We present a survey of the most important inequalities and monotonicity, concavity (convexity) results of the zeros of Bessel functions. The results refer to the definition Jνκ of the zeros of Cν (x) = Jν (x) cosα −Yν (x) sin&
Andrea Laforgia, Pierpaolo Natalini
doaj  

Weak Exogeneity, Driving Trends and Non‐Causality. Is Dynamic Adjustment Informative About Causality?

Oxford Bulletin of Economics and Statistics, EarlyView.
ABSTRACT In VECMs (or CVARs), the weak exogeneity of some of the variables (for the long‐run parameters) is related to the equilibrium adjustment dynamics. This has sometimes led to the statistical concept of weak exogeneity being given a causal interpretation.
Emanuele Lopetuso, Michael P. Clements
wiley   +1 more source

Decision‐Making and Family Planning among People with Clinical Depressiveness—Findings from a Representative German Panel Study

Studies in Family Planning, EarlyView.
Abstract Personally important decisions, like reproductive choices, may be challenging for individuals with clinical depressiveness, as indecisiveness is a common depressive symptom. This study examines whether decision‐making modes related to reproductive behavior differ between individuals with and without clinical depressiveness (H1) and whether ...
Marie Lehnert, Tanja Gabriele Baudson, Doris Erbe   +2 more
wiley   +1 more source

A novel dual‐decomposition method for non‐convex two‐stage stochastic mixed‐integer quadratically constrained quadratic problems

International Transactions in Operational Research, Volume 33, Issue 5, Page 3128-3157, September 2026.
Abstract We propose the novel p‐branch‐and‐bound method for solving two‐stage stochastic programming problems whose deterministic equivalents are represented by non‐convex mixed‐integer quadratically constrained quadratic programming (MIQCQP) models. The precision of the solution generated by the p‐branch‐and‐bound method can be arbitrarily adjusted by
Nikita Belyak, Fabricio Oliveira
wiley   +1 more source

Urban vs. Rural Lifestyles in terms of Theories of Cultural Globalization

جامعه شناسی کاربردی, 2013
Introduction   Globalization has indubitably caused local, national, and international sections to meet and intertwine in ways that have historically been unimaginable.
Mohammad Najjarzadeh
doaj  

Robust Tests of Forecast Accuracy for Factor‐Augmented Regressions With an Application to the Novel EA‐MD‐QD Dataset

Journal of Applied Econometrics, Volume 41, Issue 5, Page 549-566, August 2026.
ABSTRACT We present four novel tests of equal predictive accuracy and encompassing á Pitarakis (2023, 2025) for factor‐augmented regressions. Factors are estimated using cross‐section averages (CAs) of grouped series and our theoretical findings are empirically relevant: asymptotic normality, robustness to an overspecification of the number of factors,
Alessandro Morico, Ovidijus Stauskas
wiley   +1 more source

Theoretical foundations, practical applications and pedagogical challenges of the mathematics teacher's specialised knowledge model: A qualitative systematic review in secondary education

Review of Education, Volume 14, Issue 2, August 2026.
Abstract This systematic review analyses 32 studies published between 2013 and 2024 on the Mathematics Teacher's Specialised Knowledge (MTSK) model, with the aim of understanding its theoretical development, practical applications and contributions to teacher education in secondary and pre‐university contexts.
Daniel Martín‐Cudero
wiley   +1 more source

Improved optimal bounds using the Watson theorem.

Physical Review D, 1972
A method is presented to find an optimal lower bound on the quadratic functional integrals which appear in the derivation of bounds on the hadronic contribution to the muon magnetic moment, or on the Kl3 form factors, when one knows that the function and its derivative take some definite values at the origin and that its phase is given on a part of the
openaire   +3 more sources