Results 41 to 50 of about 364 (198)

Existence of a non‐stationary equilibrium in search‐and‐matching models: TU and NTU

Theoretical Economics, Volume 20, Issue 4, Page 1411-1460, November 2025.
This paper proves the existence of a non‐stationary equilibrium in the canonical search‐and‐matching model with heterogeneous agents. Non‐stationarity entails that the number and characteristics of unmatched agents evolve endogenously over time.
Christopher Sandmann, Nicolas Bonneton
wiley   +1 more source

From Simplices to Abstract Convex Spaces: A brief history of the KKM theory [PDF]

Results in Nonlinear Analysis, 2018
We review briefly the history of the KKM theory from the original KKM theorem on simplices in 1929 to the birth of the new partial KKM spaces by the following steps.
Sehie Park
doaj  

Early Postnatal Infection With Human Cytomegalovirus Has Long‐Term Consequences on Brain Structure of Former Preterm Born Children

Brain and Behavior, Volume 15, Issue 10, October 2025.
Cortical surface analyses of former preterm‐born children with (PT hCMV+) and without (PT hCMV−) early postnatal human Cytomegalovirus (hCMV) infection at ∼13 years of age. Note the strong effect of prematurity when compared to full‐term‐born children (FT, top), but the independent and even more widespread effect of HCMV infection (bottom).
Meike Müller, Karen Lidzba, Christian Gaser, Till‐Karsten Hauser, Rangmar Goelz, Klaus Hamprecht, Marko Wilke   +6 more
wiley   +1 more source

No bullying! A playful proof of Brouwer’s fixed-point theorem [PDF]

Journal of Mathematical Economics, 2018
We give an elementary proof of Brouwer's fixed-point theorem. The only mathematical prerequisite is a version of the Bolzano-Weierstrass theorem: a sequence in a compact subset of $n$-dimensional Euclidean space has a convergent subsequence with a limit in that set.
Petri, Henrik, Voorneveld, Mark
openaire   +5 more sources

Advancing causal inference in ecology: Pathways for biodiversity change detection and attribution

Methods in Ecology and Evolution, Volume 16, Issue 10, Page 2276-2304, October 2025.
Abstract Understanding the causes of biodiversity change is essential for addressing environmental challenges. While causal attribution has advanced in other fields, ecologists remain cautious about causal claims or misinterpret predictive models as causal.
Franziska Schrodt, Miriam Beck, Joaquim Estopinan, Diana E. Bowler, Colin Fontaine, Pierre Gaüzère, Romain Goury, Matthias Grenié, Inês S. Martins, Naia Morueta‐Holme, Luca Santini, Mickael Hedde, Gabrielle Martin, Emmanuelle Porcher, Sara Si‐Moussi, Marianne Tzivanopoulos, Grant Vernham, Cyrille Violle, Wilfried Thuiller   +18 more
wiley   +1 more source

Stockpiling and Shortages

International Economic Review, Volume 66, Issue 4, Page 1693-1712, October 2025.
ABSTRACT We examine the feedback loop between shortages and consumer stockpiling. The expectation of shortages induces consumers to stockpile, which amplifies the shortages they experience, which further encourages stockpiling. We show that, when aggregate supply is insufficient to meet aggregate demand and prices cannot adjust to clear the market ...
Tilman Klumpp, Xuejuan Su
wiley   +1 more source

Peer Effects in Binary Outcomes: Strategic Complementarity and Taste for Conformity With Endogenous Networks

Journal of Applied Econometrics, Volume 40, Issue 6, Page 608-626, September/October 2025.
ABSTRACT This paper introduces a generalized model of peer effects for binary outcomes, based on a network game that accounts for strategic complementarity (influence of the number of peers that select the same action) and conformity to social norms (penalizing deviations from the average peers' action).
Mathieu Lambotte
wiley   +1 more source

Existence and Uniqueness of Solutions to the Wage Equation of Dixit-Stiglitz-Krugman Model with No Restriction on Transport Costs

Discrete Dynamics in Nature and Society, 2017
In spatial economics, the distribution of wages is described by a solution to the wage equation of Dixit-Stiglitz-Krugman model. The wage equation is a discrete equation that has a double nonlinear singular structure in the sense that the equation ...
Minoru Tabata, Nobuoki Eshima
doaj   +1 more source

Some extensions of the Brouwer fixed point theorem [PDF]

We study the existence of fixed points for continuous maps $f$ from an $n$-ball $X$ in $\mathbb R^n$ to $\mathbb R^n$ with $n\geq 1$. We show that $f$ has a fixed point if, for some absolute retract $Y\subset\partial X$, $f(Y)\subset X$ and $\partial X-Y$ is an $(f, X)$-blockading set.
Jiehua Mai, Enhui Shi, Kesong Yan, Fanping Zeng   +3 more
openalex   +3 more sources

Contribution to a public good with altruistic preferences

Canadian Journal of Economics/Revue canadienne d'économique, Volume 58, Issue 3, Page 1092-1122, August 2025.
Abstract This paper presents a model of private provision of a public good where individuals have altruistic preferences and care about the private and public good consumption of the other members of their group. I compare the Nash level of the public good to the benchmark level of provision by a social planner who aggregates the preferences of group ...
Anwesha Banerjee
wiley   +1 more source