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Mixed Evidence (mixed + evidence)
Selected AbstractsThe basic cognition of jealousy: an evolutionary perspectiveEUROPEAN JOURNAL OF PERSONALITY, Issue 1 2008Jon K. Maner Abstract Penke and Asendorpf (European Journal Of Personality, vol 21, this issue) argue compellingly that research on jealousy would benefit from more direct investigation of cognitive processes, and report on research providing mixed evidence for sex differences in jealousy. We identify three limitations to the empirical approach utilised by Penke and Asendorpf, and highlight novel conceptual and methodological approaches for directly examining the basic cognitive mechanisms associated with jealousy and intrasexual rivalry. Investigating the basic cognition of intrasexual rivalry will help expand the scope of jealousy-related research. Copyright © 2007 John Wiley & Sons, Ltd. [source] Risk-taking incentives of executive stock options and the asset substitution problemACCOUNTING & FINANCE, Issue 1 2005Gerald T. Garvey G32; D23; J33 Abstract Various theoretical models show that managerial compensation schemes can reduce the distortionary effects of financial leverage. There is mixed evidence as to whether highly levered firms offer less stock-based compensation, a common prediction of such models. Both the theoretical and empirical research, however, have overlooked the leverage provided by executive stock options. In principle, adjusting the exercise prices of executive stock options can mitigate the risk incentive effects of financial leverage. We show that the near-universal practice of setting option exercise prices near the prevailing stock price at the date of grant effectively undoes most of the effects of financial leverage. In a large cross-sectional sample of Canadian option-granting firms, we find evidence that executives' incentives to take equity risk are negatively rather than positively related to the leverage of their employers. [source] The Changing Distribution of Pension Coverage The Changing Distributionof Pension CoverageINDUSTRIAL RELATIONS, Issue 2 2000William E. Even Data from the Current Population Surveys reveal that between 1979 and 1993 the gap in pension coverage between workers with less than 12 years of education and those with more than 16 years of education nearly tripled among men and more than quadrupled among women. The empirical analysis reveals that differences in labor market characteristics related to gender and education have grown over time and can account for virtually all the changing distribution of coverage. There is mixed evidence on the extent to which the growth of the 401(k) plan has contributed to the changing distribution of coverage. [source] Identifying the Role of Moral Hazard in International Financial MarketsINTERNATIONAL FINANCE, Issue 1 2004Steven B. Kamin Abstract Considerable attention has been paid to the possibility that large-scale IMF-led financing packages may have distorted incentives in international financial markets, leading private investors to provide more credit to emerging market countries, and at lower interest rates, than might otherwise have been the case. Yet, prior attempts to identify such distortions have yielded mixed evidence, at best. This paper makes three contributions to our ability to assess the empirical importance of moral hazard in international financial markets. First, it is argued that, because large international ,bail-outs' did not commence until the 1995 Mexican crisis, financial indicators prior to that time could not have reflected a significant degree of this type of moral hazard. Therefore, one test for the existence of moral hazard is that the access of emerging markets to international credit is significantly easier than it was prior to 1995. Second, the paper argues that because private investors expect large-scale IMF-led packages to be extended primarily to economically or geo-politically important countries, moral hazard, if it exists, should lead these countries to have easier terms of access to credit than smaller, non-systemically important countries. Finally, in addition to looking at bond spreads, the focus of earlier empirical analyses of moral hazard, the paper also examines trends in capital flows to gauge the access of emerging market countries to external finance. Looking at the evidence in light of these considerations, the paper concludes that there is little support for the view that moral hazard is significantly distorting international capital markets at the present time. [source] Have Business Cycles Become More Synchronized?JCMS: JOURNAL OF COMMON MARKET STUDIES, Issue 1 2002Jakob De Haan Will further integration make business cycles in EMU countries more similar? This article answers the question by analysing to what extent business cycles in US and German states have become more synchronized and by examining whether synchronization in OECD countries is affected by trade intensity and exchange rate stability. Using long-run data for the US we find only mixed evidence for synchronization. However, post-war data for Germany suggest that business cycles behave more similarly over time. The evidence for OECD countries is mixed: trade intensity has led to more, and exchange rate stability to less, synchronization. [source] Incidental framing effects and associative processes: a study of attribute frames in broadcast news storiesJOURNAL OF BEHAVIORAL DECISION MAKING, Issue 4 2005Sandra L. Schneider Abstract Most studies of the effects of framing decision alternatives either positively or negatively have focused on planned, intentional evaluations of those alternatives. To better understand these effects, we broadened the range of investigation to focus on the kinds of incidental evaluations that often occur in real-world contexts. Participants listened to one of four variations of a campus radio news broadcast, ostensibly to provide input for future programming. The stories in each broadcast included the same basic facts, but those facts were carefully phrased to create two positively and two negatively framed stories per broadcast. Based on an associative processing account, we hypothesized that valence-consistent framing effects would occur even though participants did not expect to evaluate the content of the stories. Results supported this hypothesis, with mixed evidence that the effects may generalize to related university experiences. We conclude that framing effects are likely to result from automatic valence-encoding processes coupled with inferential processes that help make sense of the larger context within which the description of an alternative is embedded. Copyright © 2005 John Wiley & Sons, Ltd. [source] Effect of Metoprolol on Quality of Life in the Prevention of Syncope TrialJOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY, Issue 10 2009Ph.D., ROBERT S. SHELDON M.D. Introduction: Vasovagal syncope is common, often recurrent, and reduces quality of life. No therapies have proven useful to improve quality of life in adequately designed randomized clinical trials. Beta-blockers have mixed evidence for effectiveness in preventing syncope. Methods: The Prevention of Syncope Trial was a randomized, placebo-controlled, double-blind, multinational, clinical trial that tested the hypothesis that metoprolol improves quality of life in adult patients with vasovagal syncope in a 1-year observation period. Randomization was stratified in strata of patients <42 and ,42 years old. The quality of life questionnaires Short Form-36 (SF-36) and Euroqol EQ-5D were completed at baseline and after 6 and 12 months of treatment by 204, 132, and 121 patients, respectively. Results: There were 208 patients, mean age 42 ± 18, of whom 134 (64%) were females. All had positive tilt tests. There was no improvement in quality of life during the trial in the entire group or in either treatment arm. Patients in the metoprolol treatment arm did not have improved quality of life compared to the patients in the placebo arm using either the SF-36 or EQ5D after either 6 or 12 months. Finally, there was no improvement in quality of life associated with metoprolol use in patients either <42 or ,42 years of age. Conclusion: Metoprolol does not improve quality of life in patients with recurrent vasovagal syncope and a positive tilt test. [source] Reproductive interactions mediated by flowering overlap in a temperate hummingbird,plant assemblageOIKOS, Issue 4 2010Marcelo A. Aizen Pollinator-mediated competition through shared pollinators can lead to segregated flowering phenologies, but empirical evidence for the process responsible for this flowering pattern is sparse. During two flowering seasons, we examined whether increasing overlap in flowering phenology decreased conspecific pollination, increased heterospecific pollination, and depressed seed output in the seven species composing a hummingbird,plant assemblage from the temperate forest of southern South America. Overall trends were summarized using meta-analysis. Despite prevailing negative associations, relations between phenological overlap and conspecific pollen receipt varied extensively among species and between years. Heterospecific pollen receipt was low and presumably of limited biological significance. However, our results supported the hypothesis that concurrent flowering promotes interspecific pollen transfer, after accounting for changes in the abundance of conspecific flowers. Seed output was consistently reduced during maximum phenological overlap during the first flowering season because of limited fruit set. Responses varied more during the second year, despite an overall negative trend among species. Relations between estimated effects of phenological overlap on pollination and seed output, however, provided mixed evidence that conspecific pollen loss during pollinator visits to foreign flowers increases pollen limitation. By flowering together, different plant species might benefit each other's pollination by increasing hummingbird recruitment at the landscape level. Nevertheless, our results are mostly consistent with the hypothesis of pollinator-mediated competition shaping the segregated flowering pattern reported previously for this temperate plant assemblage. The mechanisms likely involve effects on male function, whereby pollen-transport loss during heterospecific flower visits limit pollen export, and more variable effects on female function through pollen limitation. [source] Pregnancy Intention and Preterm Birth: Differential Associations Among a Diverse Population of WomenPERSPECTIVES ON SEXUAL AND REPRODUCTIVE HEALTH, Issue 2 2008Aimee Afable-Munsuz CONTEXT:,Studies published to date provide mixed evidence on the relationship between unintended pregnancy and preterm birth, and none take into consideration that the meaning of unintended pregnancy may vary across racial and ethnic groups. METHODS:,Data from the 1999,2003 rounds of the Maternal and Infant Health Assessment, a population-based, representative survey of postpartum women in California, were used to assess the relationship between pregnancy intention and preterm birth. For racial and ethnic groups in which an association was found, sequential logistic regression was conducted to further examine the relationship while controlling for socioeconomic characteristics. RESULTS:,In unadjusted results, pregnancy intention was associated with preterm birth among both whites and immigrant Latinas, but not among blacks or U.S.-born Latinas. Among whites, compared with women who reported that their pregnancy was intended, those who were unsure about their pregnancy had elevated odds of preterm birth (odds ratio, 1.4), as did those who reported their pregnancy was unwanted (1.7) or mistimed (1.4). Among immigrant Latinas, those who reported being unsure about their pregnancy were at higher risk of preterm birth than were those who reported an intended pregnancy (1.6). After adjustment for socioeconomic factors, the association remained significant for immigrant Latinas who were unsure about their pregnancy (1.5), but none of the associations remained significant for whites. CONCLUSIONS:,Women's interpretations of questions about pregnancy intention and their social experiences regarding pregnancy intention may vary by race or ethnicity. Studies on the association between pregnancy intention and preterm birth may need to be group-specific. [source] Social contextual links to emotion regulation in an adolescent psychiatric inpatient population: do gender and symptomatology matter?THE JOURNAL OF CHILD PSYCHOLOGY AND PSYCHIATRY AND ALLIED DISCIPLINES, Issue 11 2009Molly Adrian Background:, The regulation of emotion is essential for adaptive functioning. However, delineating the pathways of emotion regulation (ER) processes that lead to psychological adaptation remains under-studied, with mixed evidence for the specificity vs. generality of ER deficits in relation to specific forms of psychopathology. To examine this issue, this study investigated links among ER, social-contextual factors (family, peer), and psychological adjustment (internalizing, externalizing). Method:, Participants were 140 adolescents (71% female, 83.3% Caucasian, M age = 16.03 years) who were consecutive psychiatric admissions over a one-year period. Adolescents completed measures on family environment and peer relationship experiences. Both adolescents and parents reported on adolescents' characteristic patterns of ER and psychopathology. Results:, Discriminant analyses revealed that two functions, ER skills and impulsivity/lability, differentiated among adolescents who were elevated in internalizing symptoms only, in externalizing symptoms only, in both domains, or in neither domain. Regarding social contextual variables, family cohesion was associated with adaptive ER behaviors for girls along the internalizing dimension and all adolescents reporting externalizing behaviors. Relational victimization predicted difficulties with ER in both symptom domains for all adolescents. Within the internalizing domain, friendship support was related to adaptive ER. Conclusion:, Facets of ER do differentiate between global indices of internalizing and externalizing behaviors and suggest that both general and specific factors contribute to adolescents' unique learning history with emotions and characteristic patterns for managing emotions. [source] Are apes inequity averse?AMERICAN JOURNAL OF PRIMATOLOGY, Issue 2 2009New data on the token-exchange paradigm Abstract Recent studies have produced mixed evidence about inequity aversion in nonhuman primates. Brosnan et al. [Proceedings of the Royal Society of London. Series B. Biological Sciences 272:253,258, 2005] found inequity aversion in chimpanzees and argued that effort is crucial, if subjects are to evaluate how they are rewarded in comparison to a competitor for an identical performance. In this study we investigated inequity aversion with chimpanzees, bonobos and orangutans, using the method of Brosnan et al. [Proceedings of the Royal Society of London. Series B. Biological Sciences 272:253,258, 2005] after introducing some methodological improvements. Subjects always received a less-preferred food in exchange for a token, whereas the competitor received either the same type of food for their token (equity) or a more favored food for it (inequity). Apes did not refuse more of the less-preferred food when a competitor had received the more favored food. Thus, with an improved methodology we failed to reproduce the findings of Brosnan et al. [Proceedings of the Royal Society of London. Series B. Biological Sciences 272:253,258, 2005] that apes show inequity aversion. Am. J. Primatol. 71:175,181, 2009. © 2008 Wiley-Liss, Inc. [source] Testing the mixture-of-distributions hypothesis using "realized" volatilityTHE JOURNAL OF FUTURES MARKETS, Issue 7 2003James C. Luu The mixture-of-distributions hypothesis (MDH) posits that price volatility and trading volume are both subordinated to the same information arrival rate or "news" process. Existing studies that test MDH have the problem that both the information arrival rate and volatility are unobservable. Recent work (e.g., Andersen et al., 2001) suggests that intraday returns can be used to construct estimates of daily return volatility that are more precise than those constructed using daily returns. In a way, realized volatility becomes observable. Conducting a number of tests of MDH we find that every conclusion based on the daily squared return is reversed when using realized volatility based on intraday returns. Hence, the mixed evidence on MDH in the existing literature can in part be attributed to the use of poor realized volatility measures. © 2003 Wiley Periodicals, Inc. Jrl Fut Mark 23:661,679, 2003 [source] MACROECONOMIC UNCERTAINTY AND MACROECONOMIC PERFORMANCE: ARE THEY RELATED?THE MANCHESTER SCHOOL, Issue 2005DON BREDIN We use a very general bivariate generalized autoregressive conditional heteroskedasticity-in-mean model and G7 monthly data covering the 1957,2003 period to test for the impact of real and nominal macroeconomic uncertainty on inflation and output growth. Our evidence supports a number of important conclusions. First, in most countries output growth uncertainty is a positive determinant of the output growth rate. Second, there is mixed evidence regarding the effect of inflation uncertainty on inflation and output growth. Hence, contrary to popular belief, uncertainty about the inflation rate is not necessarily detrimental to economic growth but in some cases it may also enhance growth. Finally, there is mixed evidence on the effect of output uncertainty on inflation. In sum, our results indicate that macroeconomic uncertainty may even improve macroeconomic performance. [source] ARE LABOUR FORCE PARTICIPATION RATES NON-STATIONARY?AUSTRALIAN ECONOMIC PAPERS, Issue 2 2008EVIDENCE FROM 130 YEARS FOR G7 COUNTRIES This paper applies a unit root test with a non-linear threshold to examine whether labour force participation rates are mean reverting for G7 countries using annual data over a 130 year period. We find some evidence of mean reversion for just over half the sample; however, this result is sensitive to regime shifts. We also examine whether the labour force participation rate is trend reverting through employing a lagrange multiplier (LM) unit root test with one and two structural breaks in the intercept and slope. The LM unit root test provides no additional evidence in support of stationarity. On the basis of the unit root tests for mean reversion we conclude that there is at best mixed evidence that long-term changes in unemployment rates translate into long-term changes in employment rates and that the unemployment rate is a useful indicator of joblessness. [source] Canadian city housing prices and urban market segmentationCANADIAN JOURNAL OF ECONOMICS, Issue 3 2009Jason Allen Abstract This paper provides a detailed empirical analysis of Canadian city housing prices. We examine the long-run relationship between city house prices in Canada from 1985 to 2005 as well as idiosyncratic relations between city prices and city-specific variables. The results suggest that city house prices are only weakly correlated in the long run and that there is a disconnect between house prices and interest rates. City-specific variables such as union wage levels and the issuance of building permits tend to be positively related to existing city house prices. Surprisingly, there is mixed evidence with respect to standard measures of economic activity such as per capita GDP and interest rates. Ce mémoire présente une analyse empirique détaillée des prix des maisons dans les villes canadiennes. On examine cette relation à long terme de 1985 à 2005 ainsi que les rapports idiosyncratiques entre ces prix et certaines variables caractéristiques de certaines villes. Les résultats montrent que les prix des maisons urbaines sont faiblement co-reliées à long terme et qu'il existe une déconnexion entre le prix des maisosn et les taux d'intérêt. Certaines variables spécifiques à certaines villes comme les niveaux de salaires des syndiqués ou l'émission de permis de construction tendent àêtre positivement reliées aux prix des maisons existantes. Surprenamment, les résultats sont mixtes pour ce qui est des mesures d'activitééconomique comme le PIB per capita ou les taux d'intérêt. [source] | |||||||||||||||||||