Results 61 to 70 of about 30,898 (244)
Análise da formação de carteiras de investimentos: uma aplicação no mercado acionário brasileiro [PDF]
Gestión Joven, 2009 O objetivo deste estudo é verificar a capacidade dos modelos financeiros teóricos de gestão de carteiras, em subsidiar a obtenção de retornos anormais no mercado acionário brasileiro.
Knebel Baggio, Daniel +3 more
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Shining light on the hospitalist work after dark
Journal of Hospital Medicine, EarlyView.Abstract Hospitalists work day and night, but the workloads of each shift are anything but uniform. Evening and overnight (“after‐hours”) work is not as visible to the health system. We aimed to increase the visibility of the after‐hours cross‐cover work by implementing standardized documentation practices that also facilitated appropriate billing for ...
Ellen Overson +3 more
wiley +1 more source
Minimização do risco em carteira: aplicação da moderna teoria do portfólio [PDF]
, 2016 TCC (graduação) - Universidade Federal de Santa Catarina. Centro Sócio-Econômico. Economia.O elevado nível de oscilação no preço dos ativos no mercado acionário, ocasionado por expectativas dos agentes econômicos resulta em alto risco para os ...
Albuquerque, Marcelo Masera de
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An Alternative Proof to Markowitz’s Model [PDF]
Journal of Finance and Economics, 2012 In the fundamental paper on portfolio selection, Markowitz (1952) described via geometric reasoning his innovative theory and provided the explicit optimal selection for the cases of 3 and 4 assets. Merton (1972) obtained for the general case the efficient portfolio frontiers explicitly by using Lagrange multipliers.
openaire +1 more source
Phytotherapy Research, EarlyView.ABSTRACT Asthma affects 260–300 million people worldwide. About 20%–35% of patients use medicinal plants with their asthma medication, often without telling their clinicians. Disclosure rates are low; up to 42% of asthma outpatients use herbal products, with no records in their charts.
Emine Kocyigit +5 more
wiley +1 more source
Sustainable Development, EarlyView.ABSTRACT Climate change is one of the most profound ethical and existential challenges of the 21st century. Beyond its physical, economic, and environmental consequences, it raises fundamental moral questions about justice, equity, responsibility, and the right to a livable planet.
Jacob Kwakye
wiley +1 more source
Markowitz model with constraints [PDF]
, 2011 Title: Markowitz model with constrains Author: Jan Němec Department: Department of Probability and Mathematical Statistics Supervisor: doc. RNDr. Petr Lachout, CSc.
Němec, Jan
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Traditional Markowitz portfolio optimization constrains daily portfolio variance to a target value, optimising returns, Sharpe or variance within this constraint. However, this approach overlooks the relationship between variance at different time scales, typically described by $σ(Δt) \propto (Δt)^{H}$ where $H$ is the Hurst exponent, most of the time ...
Nayar, Revant, Douady, Raphael
openaire +2 more sources
Right to Food in Sub‐Saharan Africa: Challenges, Policies, and Sustainable Strategies
Sustainable Development, EarlyView.ABSTRACT This article examines the multifaceted issue of food security in Sub‐Saharan Africa and the critical importance of upholding rights to food in the region. It explores the challenges posed by food insecurity, analyzes existing policies and interventions, and proposes sustainable strategies to enhance food security.
Helen Onyeaka +6 more
wiley +1 more source
A MODEL OF CONSTRUCTION OF A MINIMUM RISK PORTFOLIO BASED ON MARKOWITZ PORTFOLIO THEORY. APPLICATION ON BUCHAREST STOCK EXCHANGE [PDF]
In this paper, the authors test a model of an efficient portfolio with minimum risk, starting from the analysis of one year portfolio payoff and risk of ten securities from Bucharest Stock Exchange.
Assist. Laura Raisa Miloș Ph. D +1 more
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