Volatility spillovers and contagion from mature to emerging stock markets

This paper examines volatility spillovers from mature to emerging stock markets and tests for changes in the transmission mechanism - contagion - during turbulences in mature markets. Tri-variate GARCH-BEKK models of returns in global (mature), regional, and local markets are estimated for 41 emerging market economies (EMEs), with a dummy capturing parameter shifts during turbulent episodes. LR tests suggest that mature markets influence conditional variances in many emerging markets. Moreover, spillover parameters change during turbulent episodes. Conditional variances in most EMEs rise during these episodes, but there is only limited evidence of shifts in conditional correlations between mature and emerging markets

A Survey of Occupational Therapy Services Provided for Adults with Autism Spectrum Disorder

Background: We examined the services provided to adults with autism spectrum disorder (ASD) by occupational therapists across the United States. Method: This cross-sectional study used an online survey, with a combination of structured and open-ended questions, to collect data from a nonprobability sample. Descriptive, inferential, and nonparametric statistics were used to analyze data. Results: In our sample (N= 57), the majority of the participants spent less than half of their workweek intervening with the adult ASD population. Caregivers were instrumental in both referral and discharge, and Medicaid was the most common payer source. The Adult Sensory Profile was used by more than half of the participants and sensory integration was the most influential model underlying practice (77%). The participants advised new occupational therapists to pursue high quality continuing education courses and formal mentorship from senior colleagues. Conclusion: This study suggests that working with adults with ASD remains a niche area of practice. Further research is needed to examine the pathways to receiving occupational therapy for the adult ASD population

The impact of neo-brokers on the overconfidence bias of young retail investors in Germany

Neo-brokers play an essential role in the increase of young retail investors in Germany. Providing commission-free, low-cost trading and an engaging user experience, neo-brokers stimulate the investment behavior of young investors. By collecting data through an online survey, the impact of neo-brokers in Germany on the overconfidence bias of young retail investors will be examined. Setting up hierarchical binary logistic regression models, the study finds that young retail investors trade more frequently when investing through neo-brokers. However, there is no evidence that men trade more than women and thereby achieve lower returns when using neo-broker

Global and Regional Spillovers in Emerging Stock Markets: A Multivariate GARCH-in-mean Analysis

This paper examines global (mature market) and regional (emerging market) spillovers in local emerging stock markets. Tri-variate VAR GARCH(1,1)-in-mean models are estimated for 41 emerging market economies (EMEs) in Asia, Europe, Latin America, and the Middle East. The models capture a range of possible transmission channels: spillovers in mean returns, volatility, and cross-market GARCH-in-mean effects. Hypotheses about the importance of different channels are tested. The results suggest that spillovers from regional and global markets are present in the vast majority of EMEs. However, the nature of crossmarket linkages varies across countries and regions. While spillovers in mean returns dominate in emerging Asia and Latin America, spillovers in variance appear to play a key role in emerging Europe. There is also some evidence of cross-market GARCH-in-mean effects. The relative importance of regional and global spillovers varies too, with global spillovers dominating in Asia, and regional spillovers in Latin America and the Middle East.volatility spillovers, contagion, stock markets, emerging markets

Global and Regional Spillovers in Emerging Stock Markets: A Multivariate GARCH-in-Mean Analysis

This paper examines global (mature market) and regional (emerging market) spillovers in local emerging stock markets. Tri-variate VAR GARCH(1,1)-in-mean models are estimated for 41 emerging market economies (EMEs) in Asia, Europe, Latin America, and the Middle East. The models capture a range of possible transmission channels: spillovers in mean returns, volatility, and cross-market GARCH-in-mean effects. Hypotheses about the importance of different channels are tested. The results suggest that spillovers from regional and global markets are present in the vast majority of EMEs. However, the nature of cross-market linkages varies across countries and regions. While spillovers in mean returns dominate in emerging Asia and Latin America, spillovers in variance appear to play a key role in emerging Europe. There is also some evidence of cross-market GARCH-in-mean effects. The relative importance of regional and global spillovers varies too, with global spillovers dominating in Asia, and regional spillovers in Latin America and the Middle East.Volatility spillovers, contagion, stock markets, emerging markets

Volatility Spillovers and Contagion from Mature to Emerging Stock Markets

This paper examines volatility spillovers from mature to emerging stock markets and tests for changes in the transmission mechanism—contagion—during turbulences in mature markets. Tri-variate GARCH-BEKK models of returns in global (mature), regional, and local markets are estimated for 41 emerging market economies (EMEs), with a dummy capturing parameter shifts during turbulent episodes. LR tests suggest that mature markets influence conditional variances in many emerging markets. Moreover, spillover parameters change during turbulent episodes. Conditional variances in most EMEs rise during these episodes, but there is only limited evidence of shifts in conditional correlations between mature and emerging markets.volatility spillovers, contagion, stock markets, emerging markets

Volatility spillovers and contagion from mature to emerging stock markets

This paper models volatility spillovers from mature to emerging stock markets, tests for changes in the transmission mechanism during turbulences in mature markets, and examines the implications for conditional correlations between mature and emerging market returns. Tri-variate GARCH-BEKK models of returns in mature, regional emerging, and local emerging markets are estimated for 41 emerging market economies (EMEs). Wald tests suggest that mature market volatility affects conditional variances in many emerging markets. Moreover, spillover parameters change during turbulent episodes. In the majority of the sample EMEs, conditional correlations between local and mature markets increase during these episodes. While conditional variances in local markets rise as well, volatility in mature markets rises more, and this shift is the main factor behind the increase in conditional correlations. With few exceptions, conditional beta coefficients between mature and emerging markets tend to be unchanged or lower during turbulences. JEL Classification: F30, G15Contagion, emerging markets, Stock Markets, Volatility spillovers

Elevated CO2 levels impact fitness traits of vine mealybug planococcus ficus signoret, but not its parasitoid leptomastix dactylopii howard

Carbon dioxide (CO2) is one of the primary factors driving climate change impacts on plants, pests, and natural enemies. The present study reports the effects of different atmospheric CO2 concentrations on the vine mealybug Planococcus ficus (Signoret) and its parasitoid wasp Leptomastix dactylopii (Howard). We investigated the life-history parameters of both species on grapevine Vitis vinifera (L.) plants grown under elevated (eCO2) and ambient (aCO2) CO2 levels in a greenhouse and in a vineyard free-air carbon dioxide enrichment (FACE) facility. The greenhouse experiments with an eCO2 level of around 800 ppm showed a significant increase in survival rates, a strong trend towards declining body size, and an increasing fecundity of female mealybugs, while fertility and development time did not change. However, none of these parameters were altered by different CO2 concentrations in the VineyardFACE facility (eCO2 level around 450 ppm). On the other hand, the parasitism success, development time and sex ratio of L. dactylopii, reared on P. ficus under eCO2 or aCO2, varied neither in the greenhouse nor in the FACE facility. These results suggest that future CO2 levels might cause small-scale changes in vine mealybug fitness; however, this is not necessarily reflected by parasitoid performance.Fil: Schulze-Sylvester, Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Instituto para el Estudio de la Biodiversidad de Invertebrados; ArgentinaFil: Reineke, Annette. Hochschule Geisenheim University; Alemani

Auswirkungen der Sortenmischungsstrategie auf Backqualität,Ertrag und Krankheitsbefall im Winterweizen

Ziel der Arbeit ist es, die Auswirkungen von Sortenmischungen bei unterschiedlicher Nährstoffversorgung auf Backqualität, Ertrag und Krankheitsbefall im Ökologischen Landbau zu überprüfen. Die Ergebnisse der Versuche legen nahe, daß Interaktionen zwischen Standortbedingungen, Jahr und Sorte sehr groß sind aber insgesamt die Mischungen die Backqualität nicht beeinträchtigen. Die Datenbasis ist aber für die Formulierung von Empfehlungen nicht breit genug. Um den Einfluß von Standortfaktoren und Mischungen auf Krankheitsbefall, v.a. Fusariosen, Backqualität und Mykotoxin-belastung zu quantifizieren wurden für 2002/2003 Praxisversuche an 12 Standorten mit Reinbeständen und Mischungen angelegt