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https://www.readbyqxmd.com/read/28076383/time-varying-transition-probability-matrix-estimation-and-its-application-to-brand-share-analysis
#1
Tomoaki Chiba, Hideitsu Hino, Shotaro Akaho, Noboru Murata
In a product market or stock market, different products or stocks compete for the same consumers or purchasers. We propose a method to estimate the time-varying transition matrix of the product share using a multivariate time series of the product share. The method is based on the assumption that each of the observed time series of shares is a stationary distribution of the underlying Markov processes characterized by transition probability matrices. We estimate transition probability matrices for every observation under natural assumptions...
2017: PloS One
https://www.readbyqxmd.com/read/28074782/the-need-for-a-life-cycle-based-aging-paradigm-for-nanomaterials-importance-of-real-world-test-systems-to-identify-realistic-particle-transformations
#2
Denise M Mitrano, Bernd Nowack
Assessing the risks of manufactured nanomaterials (MNM) has been almost exclusively focused on the pristine, as-produced materials with far fewer studies delving into more complex, real world scenarios. However, when considering a life-cycle perspective, it is clear that MNM released from commercial products during manufacturing, use and disposal are far more relevant both in terms of more realistic environmental fate and transport as well as environmental risk. The quantity in which the particles are released and their (altered) physical and chemical form should be identified and it is these metrics that should be used to assess the exposure and hazard the materials pose...
January 11, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28070548/stock-market-index-data-and-indicators-for-day-trading-as-a-binary-classification-problem
#3
Renato Bruni
Classification is the attribution of labels to records according to a criterion automatically learned from a training set of labeled records. This task is needed in a huge number of practical applications, and consequently it has been studied intensively and several classification algorithms are available today. In finance, a stock market index is a measurement of value of a section of the stock market. It is often used to describe the aggregate trend of a market. One basic financial issue would be forecasting this trend...
February 2017: Data in Brief
https://www.readbyqxmd.com/read/28068361/the-use-of-mixed-effects-models-for-obtaining-low-cost-ecosystem-carbon-stock-estimates-in-mangroves-of-the-asia-pacific
#4
Jacob J Bukoski, Jeremy S Broadhead, Daniel C Donato, Daniel Murdiyarso, Timothy G Gregoire
Mangroves provide extensive ecosystem services that support local livelihoods and international environmental goals, including coastal protection, biodiversity conservation and the sequestration of carbon (C). While voluntary C market projects seeking to preserve and enhance forest C stocks offer a potential means of generating finance for mangrove conservation, their implementation faces barriers due to the high costs of quantifying C stocks through field inventories. To streamline C quantification in mangrove conservation projects, we develop predictive models for (i) biomass-based C stocks, and (ii) soil-based C stocks for the mangroves of the Asia-Pacific...
2017: PloS One
https://www.readbyqxmd.com/read/28050584/dataset-for-petroleum-based-stock-markets-and-gauss-codes-for-samem
#5
Ahmed A A Khalifa, Pietro Bertuccelli, Edoardo Otranto
This article includes a unique data set of a balanced daily (Monday, Tuesday and Wednesday) for oil and natural gas volatility and the oil rich economies' stock markets for Saudi Arabia, Qatar, Kuwait, Abu Dhabi, Dubai, Bahrain and Oman, using daily data over the period spanning Oct. 18, 2006-July 30, 2015. Additionally, we have included unique GAUSS codes for estimating the spillover asymmetric multiplicative error model (SAMEM) with application to Petroleum-Based Stock Market. The data, the model and the codes have many applications in business and social science...
February 2017: Data in Brief
https://www.readbyqxmd.com/read/28049481/expanding-access-to-parasite-based-malaria-diagnosis-through-retail-drug-shops-in-tanzania-evidence-from-a-randomized-trial-and-implications-for-treatment
#6
Kathleen Maloney, Abigail Ward, Bonnie Krenz, Nora Petty, Lindsay Bryson, Caitlin Dolkart, Theodoor Visser, Arnaud Le Menach, Valerie K Scott, Justin M Cohen, Esther Mtumbuka, Sigsbert Mkude
BACKGROUND: Tanzania has seen a reduction in the fraction of fevers caused by malaria, likely due in part to scale-up of control measures. While national guidelines require parasite-based diagnosis prior to treatment, it is estimated that more than half of suspected malaria treatment-seeking in Tanzania initiates in the private retail sector, where diagnosis by malaria rapid diagnostic test (RDT) or microscopy is illegal. This pilot study investigated whether the introduction of RDTs into Accredited Drug Dispensing Outlets (ADDOs) under realistic market conditions would improve case management practices...
January 3, 2017: Malaria Journal
https://www.readbyqxmd.com/read/27994468/relationship-between-suicide-rate-and-economic-growth-and-stock-market-in-the-people-s-republic-of-china-2004-2013
#7
Honglei Yin, Lin Xu, Yechang Shao, Liping Li, Chengsong Wan
OBJECTIVES: The objective of this study was to estimate the features of suicide rate and its association with economic development and stock market during the past decade in the People's Republic of China. METHODS: Official data were gathered and analyzed in the People's Republic of China during the period 2004-2013. Nationwide suicide rate was stratified by four year age-groups, sex, urban/rural areas, and regions (East, Central, and West). Annual economic indexes including gross domestic product (GDP) per capita and rural and urban income per capita were all adjusted for inflation...
2016: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/27990041/supplying-trees-in-an-era-of-environmental-uncertainty-identifying-challenges-faced-by-the-forest-nursery-sector-in-great-britain
#8
Richard Whittet, Joan Cottrell, Stephen Cavers, Mireia Pecurul, Richard Ennos
In recent years, numerous articles have addressed management strategies aimed at assisting forests to adapt to climate change. However, these seldom take into account the practical and economic implications of implementing these strategies, notably, supply of forest plants and seed. Using semi-structured interviews with practitioners involved in the plant and seed supply chain in Great Britain, we highlight a series of practical and economic bottlenecks commonly encountered in the supply of locally sourced seed and domestically produced planting stock for native woodland and hedging markets...
December 15, 2016: Land Use Policy
https://www.readbyqxmd.com/read/27979298/development-of-the-method-for-identification-of-selected-populations-of-torpedo-scad-megalaspis-cordyla-linnaeus-1758-using-microsatellite-dna-analyses-celfish-project-part-4
#9
Kempter Jolanta, Kielpinski Maciej, Panicz Remigiusz, Kaja Prüffer, Keszka Sławomir
Catch and consumption of torpedo scad (Megalaspis cordyla) over the western Indian Ocean, but also the western Pacific from Japan to Australia is constantly increasing. Taking into account the degree of exploitation and missing information on the population structure of torpedo scad stocks it is crucial to provide population data. The analysis included individuals obtained in 2012 and 2013 from local markets in Madagascar, Tanzania, Vietnam and Cambodia and after successful DNA extraction fragment of the nuclear rhodopsin gene (RH1) and 9 microsatellite regions (SSRs) were amplified and analysed...
April 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27917960/a-vision-for-the-future-of-pastoralism
#10
J Zinsstag, B Bonfoh, G Zinsstag, L Crump, I O Alfaroukh, M F Abakar, J Kasymbekov, Z Baljinnyam, K Liechti, M A Seid, E Schelling
Pastoral regions are challenged by social and ecological changes. Yet, there is increasingly robust evidence that pastoralism is a viable and sustainable livelihood and that pastoralists play a role in attaining the United Nations Sustainable Development Goals (SDGs). In this issue of the Scientific and Technical Review of the World Organisation for Animal Health (OIE), the authors take a broad view of pastoralism and pastoral livestock production from a number of different perspectives, taking into account societal and ecological viewpoints as well as issues of animal and human health...
November 2016: Revue Scientifique et Technique
https://www.readbyqxmd.com/read/27900240/the-effect-of-malaysia-general-election-on-stock-market-returns
#11
Venus Khim-Sen Liew, Racquel Rowland
During the latest episode of general election held in Malaysia, it is observed that the FBMKLCI index was lifted 62.52 points in a day soon after the announcement of election outcome. Moreover, the index registered a highest gain of 96.29 points in the middle of the intra-day trade. This suggests that investors who had got the right direction could make profitable intra-day trading the next trading day of the general election date. Results from statistical analysis uncover significant before-election-effect and after-election-effect from the most recent general elections held in Malaysia...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27898847/evaluating-the-removal-of-pigs-from-a-group-and-subsequent-floor-space-allowance-on-the-growth-performance-of-heavy-weight-finishing-pigs
#12
J R Flohr, M D Tokach, J M DeRouchey, J C Woodworth, R D Goodband, S S Dritz
A total of 1,092 finishing pigs (initially 36.3 kg) were used in a 117-d study to evaluate the impact of initial floor space allowance and removal strategy on the growth of pigs up to 140 kg BW. There were 4 experimental treatments with 14 pens per treatment. The first treatment provided 0.91 m per pig (15 pigs/pen). The other 3 treatments initially provided 0.65 m per pig (21 pigs/pen) with 3 different removal strategies. The second treatment (2:2:2) removed the 2 heaviest pigs from pens on d 64, 76, and 95 when floor space allowance was predicted to be limiting...
October 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27893780/identifying-key-drivers-of-return-reversal-with-dynamical-bayesian-factor-graph
#13
Shuai Zhao, Yunhai Tong, Zitian Wang, Shaohua Tan
In the stock market, return reversal occurs when investors sell overbought stocks and buy oversold stocks, reversing the stocks' price trends. In this paper, we develop a new method to identify key drivers of return reversal by incorporating a comprehensive set of factors derived from different economic theories into one unified dynamical Bayesian factor graph. We then use the model to depict factor relationships and their dynamics, from which we make some interesting discoveries about the mechanism behind return reversals...
2016: PloS One
https://www.readbyqxmd.com/read/27870298/health-effects-of-short-term-fluctuations-in-macroeconomic-conditions-the-case-of-hypertension-for-older-americans
#14
Marco Angrisani, Jinkook Lee
We investigate the health effects of short-term macroeconomic fluctuations as described by changes in unemployment rate, house, and stock market price indexes. The 'Great Recession' provides the opportunity to conduct this analysis as it involved contemporaneous shocks to the labor, housing, and stock markets. Using panel data from the Health and Retirement Study over the period 2004-2010, we relate changes in hypertension status to changes in state-level unemployment rate and house prices and to changes in stock market prices...
November 2016: Health Economics
https://www.readbyqxmd.com/read/27851796/comparison-of-monetary-policy-actions-and-central-bank-communication-on-tackling-asset-price-bubbles-evidence-from-china-s-stock-market
#15
Ou Sun, Zhixin Liu
We examine the different effects of monetary policy actions and central bank communication on China's stock market bubbles with a Time-varying Parameter SVAR model. We find that with negative responses of fundamental component and positive responses of bubble component of asset prices, contractionary monetary policy induces the observed stock prices to rise during periods of large bubbles. By contrast, central bank communication acts on the market through expectation guidance and has more significant effects on stock prices in the long run, which implies that central bank communication be used as an effective long-term instrument for the central bank's policymaking...
2016: PloS One
https://www.readbyqxmd.com/read/27846251/investigating-the-influence-relationship-models-for-stocks-in-indian-equity-market-a-weighted-network-modelling-study
#16
Biplab Bhattacharjee, Muhammad Shafi, Animesh Acharjee
The socio-economic systems today possess high levels of both interconnectedness and interdependencies, and such system-level relationships behave very dynamically. In such situations, it is all around perceived that influence is a perplexing power that has an overseeing part in affecting the dynamics and behaviours of involved ones. As a result of the force & direction of influence, the transformative change of one entity has a cogent aftereffect on the other entities in the system. The current study employs directed weighted networks for investigating the influential relationship patterns existent in a typical equity market as an outcome of inter-stock interactions happening at the market level, the sectorial level and the industrial level...
2016: PloS One
https://www.readbyqxmd.com/read/27836128/probiotic-use-in-at-risk-populations
#17
Mary Ellen Sanders, Daniel J Merenstein, Arthur C Ouwehand, Gregor Reid, Seppo Salminen, Michael D Cabana, George Paraskevakos, Gregory Leyer
OBJECTIVE: To inform health care providers about quality standards for manufacture of probiotic products being recommended for at-risk patient populations. SUMMARY: Probiotics are used in a variety of clinical settings, sometimes in at-risk populations for therapeutic endpoints. Although probiotics might not be approved as drugs, they are sometimes used for the prevention or treatment of disease. In the United States, and many regions of the world, probiotic products are marketed as dietary supplements (not drugs) and are therefore subject to different manufacturing and quality control standards than approved drugs are...
November 2016: Journal of the American Pharmacists Association: JAPhA
https://www.readbyqxmd.com/read/27818569/robust-inference-of-risks-of-large-portfolios
#18
Jianqing Fan, Fang Han, Han Liu, Byron Vickers
We propose a bootstrap-based robust high-confidence level upper bound (Robust H-CLUB) for assessing the risks of large portfolios. The proposed approach exploits rank-based and quantile-based estimators, and can be viewed as a robust extension of the H-CLUB procedure (Fan et al., 2015). Such an extension allows us to handle possibly misspecified models and heavy-tailed data, which are stylized features in financial returns. Under mixing conditions, we analyze the proposed approach and demonstrate its advantage over H-CLUB...
October 2016: Journal of Econometrics
https://www.readbyqxmd.com/read/27812141/intraday-seasonalities-and-nonstationarity-of-trading-volume-in-financial-markets-individual-and-cross-sectional-features
#19
Michelle B Graczyk, Sílvio M Duarte Queirós
We study the intraday behaviour of the statistical moments of the trading volume of the blue chip equities that composed the Dow Jones Industrial Average index between 2003 and 2014. By splitting that time interval into semesters, we provide a quantitative account of the nonstationary nature of the intraday statistical properties as well. Explicitly, we prove the well-known ∪-shape exhibited by the average trading volume-as well as the volatility of the price fluctuations-experienced a significant change from 2008 (the year of the "subprime" financial crisis) onwards...
2016: PloS One
https://www.readbyqxmd.com/read/27771540/description-and-experience-how-experimental-investors-learn-about-booms-and-busts-affects-their-financial-risk-taking
#20
Tomás Lejarraga, Jan K Woike, Ralph Hertwig
A few years ago, the world experienced the most severe economic crisis since the Great Depression. According to the depression baby hypothesis, people who live through such macroeconomic shocks take less financial risk in their future lives (e.g., lower stock market participation). This hypothesis has previously been tested against survey data. Here, we tested it in a simulated experimental stock market (based on the Spanish stock index, IBEX-35), varying both the length of historical data available to participants (including or excluding a macroeconomic shock) and the mode of learning about macroeconomic events (through sequential experience or symbolic descriptions)...
December 2016: Cognition
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