Results 171 to 180 of about 257,172 (325)

Climate explains global functional trait variation in bees

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Climate is a fundamental driver of macroecological patterns in functional trait variation. However, many of the traits that have outsized effects on thermal performance are complex, multi‐dimensional, and challenging to quantify at scale.
Madeleine M. Ostwald, Kathryn Chen, Nicholas Alexander, Luning Ding, Victor H. Gonzalez, Katja C. Seltmann   +5 more
wiley   +1 more source

Market Risk VaR Historical Simulation Model with Autocorrelation Effect: A Note

The International Journal of Banking and Finance, 2009
The modern market risk model using Value at Risk (VaR) method in the banking area under the BASEL II Accord can take different forms of simulation.
Wantanee Surapaitoolkorn
doaj  

Geometric fractional Brownian motion model for commodity market simulation

, 2020
Siti Nur Iqmal Ibrahim, Masnita Misiran, Mohamed Faris Laham   +2 more
openalex   +1 more source

Bayesian Inference of Geometric Brownian Motion: An Extension with Jumps [PDF]

arXiv
This analysis derives the maximum likelihood estimator and applies Bayesian inference to model geometric Brownian motion, incorporating jump diffusion to account for sudden market shifts. The Bayesian approach is implemented using Markov Chain Monte Carlo simulations on S\&P 500 stock data from 2009 to 2014, providing a robust framework for analyzing ...
arxiv  

Bayesian StairwayPlot for Inferring Single Population Demographic Histories From Site Frequency Spectra

Molecular Ecology Resources, EarlyView.
ABSTRACT The StairwayPlot approach provides an elegant, flexible and powerful method to estimate complex demographic histories of single populations from site frequency spectrum data. It uses expected coalescent times to compute the expected site frequency spectrum within a multinomial likelihood function.
Sebastian Höhna, Ana Catalán
wiley   +1 more source

New perspectives on body size and shape evolution in dinosaurs

Biological Reviews, EarlyView.
ABSTRACT Diversity in the body shapes and sizes of dinosaurs was foundational to their widespread success during the Mesozoic era. The ability to quantify body size and form reliably is therefore critical to the study of dinosaur biology and evolution.
Matthew Dempsey, Samuel R. R. Cross, Susannah C. R. Maidment, John R. Hutchinson, Karl T. Bates   +4 more
wiley   +1 more source

Optimal Pricing of Public Franchises With Imperfectly Correlated Demand Shocks

Journal of Economics &Management Strategy, EarlyView.
ABSTRACT In a dynamic adverse selection setting with private information about stochastic consumer preferences, we study the pricing of franchise rights when the awarding government body has to balance between revenue collection and consumer welfare. In this environment, we show that optimal pricing requires an appropriate combination of fixed and time‐
Marco Buso, Cesare Dosi, Michele Moretto
wiley   +1 more source

Do temporary changes in earnings caused by mean reversion affect firms’ refinancing decisions?

Journal of Financial Research, EarlyView.
Abstract We develop a dynamic two‐stage trade‐off model with refinancing when earnings are mean reverting. Our model predicts a negative relation between profitability and leverage at refinancing due to conservative debt increases. With multiple rounds of refinancing, the leverage–profitability relation may turn positive when firms have substantial ...
Elettra Agliardi, Marios Charalambides, Md Shahedur R. Chowdhury, Nicos Koussis   +3 more
wiley   +1 more source

Size, not phylogeny, explains the morphology of the endosseous labyrinth in the crown clade Crocodylia

Journal of Anatomy, Volume 246, Issue 4, Page 558-574, April 2025.
Here, we present the most complete dataset to date on the endosseous labyrinths of extant crocodylians. Using 3D geometric morphometrics, we show that allometry constitutes a major contributor of the shape variation of the crocodylian endosseous labyrinths and that the development of this structure is likely linked to the braincase conformation, in all
Yohan Pochat‐Cottilloux, Gwendal Perrichon, Lionel Hautier, Nicolas Rinder, Romain Amiot, Irena Raselli, Jérôme Adrien, Joël Lachambre, Vincent Fernandez, Jeremy E. Martin   +9 more
wiley   +1 more source

Semicircular canal morphology in Rodentia and its relationship to locomotion

Journal of Anatomy, EarlyView.
Here, we present a selection of rodent inner ear 3D models in the lateral view, with rodents from seven locomotor categories (left to right: fossorial, semifossorial, semiaquatic, terrestrial, ricochetal, arboreal, and gliding). Semicircular canal (SCC) morphology, including radius of curvature and shape, can be differentiated between specialized forms
Lily Hou, Ornella C. Bertrand, Hiruni N. Mudannayake, Campbell Rolian, Susanne Cote   +4 more
wiley   +1 more source