Results 31 to 40 of about 2,664 (177)

Product Positioning and Incentives to Innovate

Journal of Economics &Management Strategy, EarlyView.
ABSTRACT This paper shows that product positioning affects the incentives to invest in process innovation. The result is found using a model of price competition with three firms under horizontal product differentiation—and then extended to a more general Bertrand triopoly.
Emanuele Bacchiega, Paolo G. Garella
wiley   +1 more source

An Augmented Lagrangian Approach for Sparse Principal Component Analysis [PDF]

, 2009
Principal component analysis (PCA) is a widely used technique for data analysis and dimension reduction with numerous applications in science and engineering. However, the standard PCA suffers from the fact that the principal components (PCs) are usually
Lu, Zhaosong, Zhang, Yong
core   +2 more sources

Sequential Outlier Detection in Nonstationary Time Series

Journal of Time Series Analysis, EarlyView.
ABSTRACT A novel method for sequential outlier detection in nonstationary time series is proposed. The method tests the null hypothesis of “no outlier” at each time point, addressing the multiple testing problem by bounding the error probability of successive tests, using extreme‐value theory. The asymptotic properties of the test statistic are studied
Florian Heinrichs, Patrick Bastian, Holger Dette   +2 more
wiley   +1 more source

Spatial dynamics for a non-monotone reaction-diffusion system with spatio-temporal delay

Mathematics in Applied Sciences and Engineering
In this paper, we study the spreading speed and traveling wave solutions of a non-monotone reaction-diffusion system with spatio-temporal delay. By constructing a pair of auxiliary systems and using the Schauder 's fixed point theorem, the existence of ...
Ge Tian, Na Liang
doaj   +1 more source

Belief Change in Nonmonotonic Multi-Context Systems [PDF]

, 2013
Brewka and Eiter's nonmonotonic multi-context system is an elegant knowledge representation framework to model heterogeneous and nonmonotonic multiple contexts. Belief change is a central problem in knowledge representation and reasoning. In this paper we follow the classical AGM approach to investigate belief change in multi-context systems ...
Yisong Wang, Zhiqiang Zhuang, Kewen Wang
openaire   +1 more source

Monotonicity and Robust Implementation Under Forward‐Induction Reasoning

Econometrica, Volume 94, Issue 2, Page 505-536, March 2026.
In sequential games, the set of paths consistent with rationality and forward‐induction reasoning may change nonmonotonically when adding transparent restrictions on players' beliefs. Yet, we prove that—in an incomplete‐information environment—predictions become sharper when the restrictions only concern initial beliefs about types.
Pierpaolo Battigalli, Emiliano Catonini
wiley   +1 more source

Spreading speeds and traveling waves for non-cooperative reaction-diffusion systems

, 2010
Much has been studied on the spreading speed and traveling wave solutions for cooperative reaction-diffusion systems. In this paper, we shall establish the spreading speed for a large class of non-cooperative reaction-diffusion systems and characterize ...
Wang, Haiyan
core   +1 more source

Asymptotic Profiles and Disease Prevalence at the Steady State for an SIS Patch Model

Studies in Applied Mathematics, Volume 156, Issue 1, January 2026.
ABSTRACT Infected individuals often display mobility patterns that differ significantly from those of healthy individuals—traveling less frequently, covering shorter distances, visiting fewer destinations, and altering their timing and modes of movement.
Daozhou Gao, Xin Li
wiley   +1 more source

Minimal wave speed on a diffusive SIR model with nonlocal delays

Electronic Journal of Differential Equations, 2018
This article concerns the minimal wave speed of a diffusive SIR model with nonlocal delays, in which the dynamics of disease has no positive outbreak threshold. By constructing a pair of super and sub-solutions, we establish the existence of traveling
Wei-Jian Bo, Guo Lin, Ben Xiong
doaj  

Spreading Speed, Traveling Waves, and Minimal Domain Size in\ud Impulsive Reaction-diffusion Models [PDF]

, 2012
How growth, mortality, and dispersal in a species affect the species’ spread and persistence constitutes a central problem in spatial ecology. We propose impulsive reaction-diffusion equation models for species with distinct reproductive and dispersal ...
Lewis, M. A., Li, B.
core