Results 141 to 150 of about 503,738 (312)

Real exchange rates in latin america: The ppp hypothesis and fractional integration [PDF]

, 2008
This paper tests for PPP in a group of seventeen Latin American (LA) countries by applying fractional integration techniques to real exchange rate series. Compared to earlier studies on these economies, this approach has the advantage of allowing for non-
Caporale, GM
core  

Current practices in caesarean section training: A cross‐sectional study comparing high‐ and low‐middle‐income countries

International Journal of Gynecology &Obstetrics, EarlyView.
Abstract Objective This study identifies and describes global caesarean section (CS) training practices, comparing high‐income countries (HIC) and low‐ and middle‐income countries (LMIC). Methods A convergent parallel mixed‐methods study was conducted with a cross‐sectional survey.
Liesl de Waard, Elize Archer, Kathryn Chu, Christoffel Joseph Brand Muller, Stefan Gebhardt   +4 more
wiley   +1 more source

Understanding pre‐eclampsia and fetal growth restriction at high altitude: A narrative review

International Journal of Gynecology &Obstetrics, EarlyView.
Abstract Pre‐eclampsia (PE) and fetal growth restriction (FGR) are among the leading causes of maternal and perinatal morbidity and mortality worldwide. Both conditions are more frequent and severe at high altitudes due to physiological changes in oxygen availability and vascular adaptation.
Víctor S. Rangel, Juliana Malagón Castillo, Juan David Duarte, Mariana Abril Barreto, Alejandra Vivas Ramirez, José Alejandro Daza, Ángela María Ruiz‐Sternberg   +6 more
wiley   +1 more source

Diversity and conservation status of palms (Arecaceae) in two hotspots of biodiversity in Colombia and Ecuador

Plants, People, Planet
Societal Impact Statement Palms provide vital plant resources and ecosystem services to people across the tropics. To improve conservation guidance, a “health check” of palms in two highly threatened biodiversity hotspots in Colombia and Ecuador was ...
Thomas L. P. Couvreur, Nayeli Jijon, Rommel Montúfar, Paula A. Morales‐Morales, Maria José Sanín, Juan Carlos Copete, Alix Lozinguez, Álvaro J. Pérez, Emily Beech   +8 more
doaj   +1 more source

Elucidating the origin of open‐circuit voltage in ternary organic solar cells with a nonfullerene and a fullerene acceptor

InfoMat, EarlyView.
Fullerenes tend to alloy with polymer:nonfullerene acceptor hosts, yielding composition‐dependent increases in open‐circuit voltage while recombination remains governed by the charge‐transfer state energy and is independent of the nature of the third component.
Dominic Blätte, Marcella Günther, Carlito S. Ponseca Jr., Andreas Weis, Rik Hooijer, Lucie Quincke, Miguel A. T. Cachafeiro, Wolfgang Tress, Jose D. Perea, Salvador Leon, Ali Shuaib, Pavel Chabera, Tönu Pullerits, Thomas Bein, Tayebeh Ameri   +14 more
wiley   +1 more source

Gossypium survey. Collecting in Peru (III), collecting in Mexico (IV), present survival of sub-spontaneous cotton [PDF]

, 1984
Ces dernières années, le CIRP a organisé avec le concours de l'Institut français de recherches du coton et textiles exotiques (IRCT) une mission en plusieurs phases pour récolter des spécimens de cotonniers subspontanés.
Ano, Georges, Schwendiman, Jacques
core  

Evaluating Youth Participatory Action Research in the Americas: Comparative Insights on Empowerment, Methodologies, and Social Change

Journal of Adolescence, EarlyView.
ABSTRACT Introduction Youth Participatory Action Research (YPAR) positions adolescents as co‐researchers to investigate and address social issues affecting their lives. While YPAR has gained global prominence, comparative research examining how it is conceptualized and practiced across regional contexts remains limited.
John Diaz, Paola Velasquez Quintero, Cody Gusto, Ivan Muñoz‐Echeverri, Camilo Norena Herrera, Laura Valencia   +5 more
wiley   +1 more source

Forecasting Natural Gas Prices in Real Time

Journal of Applied Econometrics, EarlyView.
ABSTRACT This paper provides a comprehensive analysis of the forecastability of the real price of natural gas in the United States at the monthly frequency considering a universe of models that differ in complexity and economic content. We find that considerable reductions in mean‐squared prediction error relative to a no‐change benchmark can be ...
Christiane Baumeister, Florian Huber, Thomas K. Lee, Francesco Ravazzolo   +3 more
wiley   +1 more source

The PCDID Approach to Treatment Effects Estimation: A Further Investigation

Journal of Applied Econometrics, EarlyView.
ABSTRACT In the present paper, we study the so‐called “PCDID” approach to treatment effects estimation in panels with interactive effects where the factors represent trends whose effect need not be parallel across the cross‐sectional units. Our interest in this step‐wise approach originates with the observation that the interactive effects are ignored ...
Tilman Bretschneider, Joakim Westerlund
wiley   +1 more source

A second species of Cotopaxia (Umbelliferae/ Apiaceae), from Colombia A second species of Cotopaxia (Umbelliferae/ Apiaceae), from Colombia

Caldasia, 1984
Cotopaxia whitei (Umbelliferae/ Apiaceae) , a new species from the Sierra Nevada de Santa Marta, Dpto. Magdalena, Colombia, is here described andillustrated. The other known species of Cotopaxia, C.
Constance Lincoln, Alverson William S.
doaj