Results 51 to 60 of about 481 (177)
Revista da Faculdade de Administração e Economia, 2021 Esta pesquisa teve a finalidade de analisar a dinâmica e a transmissão da volatilidade dos preços à vista e futuros do etanol pelos modelos ARCH, GARCH, EGARCH e TARCH. A amostra utilizada nesta pesquisa é composta pelas cotações diárias do etanol hidratado spot negociado na base de Paulínia (SP), disponibilizadas pelo CEPEA/ESALQ e das cotações ...
openaire +2 more sources
US Foreign Policy and the Gulf States: Changing Dynamics in a Multipolar World
World Affairs, Volume 188, Issue 4, Winter 2025.ABSTRACT This article focuses on US foreign policy toward the Gulf from Obama's Pivot to Asia to the initial period of the second Trump administration. It situates the role of the US within the broader context of the global energy transition and the Gulf states as geopolitical actors in a multipolar world order.
Steven Wright
wiley +1 more source
Animal Conservation, Volume 28, Issue 6, Page 803-816, December 2025.Our study projects significant climate change‐induced distribution shifts of a keratin‐feeding beetle Omorgus suberosus, with expansions into higher latitudes in Europe and North America and notable habitat losses in tropical regions by 2100. Ecological niche models predict a global habitat reduction of 9.5% under SSP2–4.5 and 20.8% under SSP5–8.5 ...
Janderson Batista Rodrigues Alencar +4 more
wiley +1 more source
CLIO América, 2014 El objetivo de esta investigación es determinar ¿cuál es el modelo que permite explicar con mayor precisión el comportamiento histórico del índice general de la bolsa de valores de Colombia (IGBC), durante el periodo comprendido entre el 01 de enero de ...
Edder Parody Camargo +2 more
doaj
Role of protected areas in mitigating range loss and local extinctions of terrestrial mammals
Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Protected areas (PAs) are a major tool in biodiversity conservation, but the extent to which they mitigate species declines is often unclear. We evaluated the effectiveness of PAs in mitigating range contraction and local extinction for 483 terrestrial mammal species.
Andrea Cristiano +5 more
wiley +1 more source
American Journal of Biological Anthropology, Volume 188, Issue 3, November 2025.ABSTRACT This article introduces the special issue Toward a Biocultural Synthesis of the Peopling of the Americas, which brings together contributions that explore the origins and diversity of Indigenous populations across North, Central, and South America and the Caribbean. The volume grew out of an invited symposium held at the 90th Annual Meeting of
Lumila Paula Menéndez, Mark Hubbe
wiley +1 more source
Ecological Solutions and Evidence, Volume 6, Issue 4, October–December 2025.Citizen scientists and an expert jointly monitor Biomphalaria snails (the intermediate host of Schistosoma mansoni) in rural areas of southwest Uganda, generating over 4500 georeferenced records. By comparing expert‐ and citizen‐based distribution models under perfect and imperfect detection, we demonstrate that site type and NDVI consistently ...
Noelia Valderrama‐Bhraunxs +5 more
wiley +1 more source
Ecology and Evolution, Volume 15, Issue 10, October 2025.This study evaluates the climatic and anthropogenic factors driving the habitat suitability of the invasive Cuban knight anole (Anolis equestris) in Florida and its potential impact on three threatened invertebrate species through habitat overlap. Using species distribution models (SDMs), we found that urbanization strongly influences the anole's ...
Alexander S. Romer +6 more
wiley +1 more source
Economía Teoría y Práctica, 2016 En este trabajo se utilizan los modelos arfima y garch, así como combinaciones de ellos para detectar algún tipo de memoria en el tipo de cambio nominal usd-mxn y el Índice de Precios y Cotizaciones de la Bolsa Mexicana de Valores durante el periodo 1991-
Héctor F. Salazar-Núñez +1 more
doaj
Os Efeitos Alavancagem e Feedback na Volatilidade do Mercado Acionário Brasileiro
Enfoque, 2017 O objetivo deste estudo foi realizar uma comparação das volatilidades entre o segmento tradicional e o Novo mercado da BOVESPA de janeiro de 2008 a dezembro de 2012.
Luciano Ferreira Carvalho +3 more
doaj +1 more source