scholarly journals Η συμβολή των μεταναστών στην ελληνική οικονομία: Mετά-ανάλυση των εμπειρικών ευρημάτων

2016 ◽  
Vol 8 (2) ◽  
Author(s):  
Θεόδωρος Μητράκος
Keyword(s):  
Survey Design ◽  
Effect Sizes ◽  
Empirical Literature ◽  
Probit Models ◽  
Comparable Effect ◽  
Study Characteristics ◽  
Greek Economy ◽  
Meta Analyses ◽  
The Impact ◽  
The Relationship

This study synthesizes the findings of the empirical literature available by means of meta-analyses of the impact of immigration on the Greek economy in order to detect whether consensus conclusions are emerging and whether differences in results across studies can be explained. For this purpose, the study recodes the contribution of migrants to the Greek economy and the labour market resulting from the available studies as benefiting or harming the Greek economy and native born, and estimates alternative probit and order probit models to assess the relationship between this observed impact and key study characteristics such as methodology, period of investigation, survey design, publication year etc. Even if the sample of studies available to generate comparable effect sizes remains severely limited by the heterogeneity in different approaches, the study shows that the contribution of immigrants in terms of economic growth, wages and employment is clearly positive, although rather relatively small.

scholarly journals A protocol for the systematic review and meta-analysis of thigmotactic behaviour in the open field test in rodent models associated with persistent pain

2021 ◽  
Vol 5 (1) ◽  
pp. e100135
Author(s):  
Xue Ying Zhang ◽  
Jan Vollert ◽  
Emily S Sena ◽  
Andrew SC Rice ◽  
Nadia Soliman
Keyword(s):  
Systematic Review ◽  
Outcome Measure ◽  
Meta Analysis ◽  
Persistent Pain ◽  
Effect Sizes ◽  
Bias Assessment ◽  
Animal Pain ◽  
Trim And Fill ◽  
Meta Analyses ◽  
The Impact

ObjectiveThigmotaxis is an innate predator avoidance behaviour of rodents and is enhanced when animals are under stress. It is characterised by the preference of a rodent to seek shelter, rather than expose itself to the aversive open area. The behaviour has been proposed to be a measurable construct that can address the impact of pain on rodent behaviour. This systematic review will assess whether thigmotaxis can be influenced by experimental persistent pain and attenuated by pharmacological interventions in rodents.Search strategyWe will conduct search on three electronic databases to identify studies in which thigmotaxis was used as an outcome measure contextualised to a rodent model associated with persistent pain. All studies published until the date of the search will be considered.Screening and annotationTwo independent reviewers will screen studies based on the order of (1) titles and abstracts, and (2) full texts.Data management and reportingFor meta-analysis, we will extract thigmotactic behavioural data and calculate effect sizes. Effect sizes will be combined using a random-effects model. We will assess heterogeneity and identify sources of heterogeneity. A risk-of-bias assessment will be conducted to evaluate study quality. Publication bias will be assessed using funnel plots, Egger’s regression and trim-and-fill analysis. We will also extract stimulus-evoked limb withdrawal data to assess its correlation with thigmotaxis in the same animals. The evidence obtained will provide a comprehensive understanding of the strengths and limitations of using thigmotactic outcome measure in animal pain research so that future experimental designs can be optimised. We will follow the Preferred Reporting Items for Systematic Reviews and Meta-Analyses reporting guidelines and disseminate the review findings through publication and conference presentation.

Passive but defiant: the role of innovative capabilities in knowledge management and corporate entrepreneurship

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Muhammad Azhar Khalil ◽  
Muhammad Khuram Khalil ◽  
Rashid Khalil
Keyword(s):  
Corporate Entrepreneurship ◽  
Empirical Literature ◽  
Equation Modeling ◽  
Market Demand ◽  
Content Type ◽  
Knowledge Based ◽  
Innovative Capabilities ◽  
The Impact ◽  
The Relationship

Purpose This paper aims to examine the role of organizational innovative capabilities (OIC) on the relationship between knowledge sharing (KS), corporate entrepreneurship (CE) and firm performance (FP). Specifically, this study uses the knowledge-based view to develop a model that examines the mentioned relationship. Design/methodology/approach Using survey data from 520 participants across 75 service sector companies in Thailand, measurement and structure models are tested through structural equation modeling to quantify the impact between constructs. Findings This study shows that KS and CE positively affect OIC and FP. A positive relationship is also found between KS and CE. The mediating impact of OIC strengthens the relationship between KS and CE on FP. Research limitations/implications Like all research using survey methods, the research is prone to respondent biases and generalizability. However, this paper has put the best effort to minimize such effects by rigorous methodological testing to avoid such biases. Practical implications The findings of this study suggest that to improve organizational learning and knowledge-based performance, commitment and understanding of the employees in the entire organization is crucial. KS significantly contributes to developing innovative abilities because of its characteristics of providing firm-specific and socially complex advantages. The way a firm transforms and exploits its knowledge may ascertain its level of innovativeness, such as coming up with certain problem-solving procedures and new product development according to the rapid change in the market demand. However, organizations may only instigate to effectively organize knowledge when their employees are ready to share knowledge. Continuous KS boosts entrepreneurial practices and contributes innovativeness across individuals, groups, units or the entire organization. Originality/value The relationship between CE, organization innovative capabilities and FP in the presence of KS is rarely discussed in both theoretical and empirical literature. This study contributes to the literature by arguing that apart from the direct impact of KS on FP, KS can lead the firms toward generating important competitive advantage by forming innovative capabilities that can significantly influence FP.

Prevalence of extra-articular manifestations in psoriatic arthritis: a systematic review and meta-analysis

Rheumatology ◽  
2020 ◽  
Vol 59 (9) ◽  
pp. 2199-2206 ◽  
Author(s):  
Bradley Pittam ◽  
Sonal Gupta ◽  
Nicholas L Harrison ◽  
Selina Robertson ◽  
David M Hughes ◽  
...  
Keyword(s):  
Radiographic Progression ◽  
Meta Analysis ◽  
Response To Treatment ◽  
Disease Outcomes ◽  
Disease Mechanisms ◽  
Prevalence Estimates ◽  
Study Characteristics ◽  
Meta Analyses ◽  
The Impact ◽  
Nail Disease

Abstract Objective To describe the prevalence of extra-articular manifestations—enthesitis, dactylitis, nail disease, uveitis and IBD—in PsA, and their impact on longitudinal disease outcomes. Methods We searched Medline, PubMed, Scopus and Web of Science using a predefined protocol in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Studies using imaging to define extra-articular manifestations (EAMs) were excluded. Where possible, we performed meta-analyses of prevalence estimates, reported as percentages (95% CI). Heterogeneity (I2 statistic) was examined according to study characteristics. Results We identified 65 studies amounting to a total of 163 299 PsA patients. Enthesitis was assessed in 29 studies with an average prevalence of 30% (95% CI: 24%, 38%). Dactylitis was reported in 35 studies with an average prevalence of 25% (95% CI: 20%, 31%). Nail disease was present in 60% (95% CI: 52%, 68%) across 26 studies, but definitions were often unclear. Uveitis (3.2%; 95% CI: 1.9%, 5.3%) and IBD (3.3%; 95% CI: 1.5%, 7.1%) were less common. Heterogeneity was high (>95%) in all meta-analyses, but could not be explained by study characteristics. No studies examined the impact of EAMs on longitudinal disease outcomes, except that dactylitis increases radiographic progression. Conclusion Enthesitis, dactylitis and nail disease are highly prevalent in PsA, but not uveitis and IBD. EAM patterns differ from axial SpA despite their shared disease mechanisms, which may help further understand differences between spondyloarthritides. More studies are needed on the impact of EAMs on disease outcomes such as response to treatment.

scholarly journals The Design, Content and Delivery of Relationship and Sexuality Education Programmes for People with Intellectual Disabilities: A Systematic Review of the International Evidence

2020 ◽  
Vol 17 (20) ◽  
pp. 7568
Author(s):  
Michael Brown ◽  
Edward McCann ◽  
Maria Truesdale ◽  
Mark Linden ◽  
Lynne Marsh
Keyword(s):  
Intellectual Disabilities ◽  
Sexuality Education ◽  
Inclusion Criteria ◽  
Quality Appraisal ◽  
Programme Development ◽  
People With Intellectual Disabilities ◽  
Adults With Intellectual Disabilities ◽  
Meta Analyses ◽  
The Impact ◽  
The Relationship

There is growing empirical evidence regarding the relationship and sexuality experiences and needs of children, young people and adults with intellectual disabilities. A total of twelve papers met the inclusion criteria regarding relationship and sexuality education (RSE) programmes specific to the needs of this population. The preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines were followed and quality appraisal undertaken. The four themes identified were principles informing RSE programme development, design and content of RSE programmes, delivery of RSE programmes and evaluation of RSE programmes. The discussion presents areas that need to be addressed to ensure that people with intellectual disabilities, their families, carers and professionals are fully involved in the design and delivery of RSE programmes. Further research is required to identify the impact of the programmes and the sustained outcomes achieved. Recommendations are made regarding the activities required to enable the development of evidence-based and person-centred approaches to relationship and sexuality programmes.

Preliminary Examination of the Impact of Program Factors on Summary Effect Sizes

2020 ◽  
pp. 0306624X2096406
Author(s):  
Liana R. Taylor ◽  
Avinash Bhati ◽  
Faye S. Taxman
Keyword(s):  
Correctional Education ◽  
Behavioral Therapy ◽  
Research Question ◽  
Effect Sizes ◽  
State Institute ◽  
Program Administrators ◽  
Summary Effect ◽  
Meta Regression ◽  
Meta Analyses ◽  
The Impact

The Washington State Institute for Public Policy (WSIPP) uses meta-analyses to help program administrators identify effective programs that reduce recidivism. The results are displayed as summary effect sizes. Yet, many programs are grouped within a category (such as Intensive Supervision or Correctional Education), even though the features of the programs might suggest they may be very different. The following research question was examined: What program features are related to the effect size in the WSIPP program category? Researchers at ACE! at George Mason University reviewed the studies analyzed by WSIPP and their effect sizes. The meta-regression global models showed recidivism decreased with certain program features, while other program features actually increased recidivism. A multivariate meta-regression showed substantial variation across Cognitive-Behavioral Therapy programs. These preliminary findings suggest the need to further research how differing program features contribute to client-level outcomes, and develop a scheme to better classify programs.

scholarly journals Influence of Pilot and Small Trials in Meta-Analyses of Behavioral Interventions: A Meta-epidemiological Study

2020 ◽  
Author(s):  
Michael W. Beets ◽  
R. Glenn Weaver ◽  
John P.A. Ioannidis ◽  
Alexis Jones ◽  
Lauren von Klinggraeff ◽  
...  
Keyword(s):  
Sample Size ◽  
Behavioral Interventions ◽  
Meta Analysis ◽  
Statistical Significance ◽  
Feasibility Studies ◽  
Small Sample ◽  
Effect Sizes ◽  
Absolute Difference ◽  
Meta Analyses ◽  
The Impact

Abstract Background: Pilot/feasibility or studies with small sample sizes may be associated with inflated effects. This study explores the vibration of effect sizes (VoE) in meta-analyses when considering different inclusion criteria based upon sample size or pilot/feasibility status. Methods: Searches were conducted for meta-analyses of behavioral interventions on topics related to the prevention/treatment of childhood obesity from 01-2016 to 10-2019. The computed summary effect sizes (ES) were extracted from each meta-analysis. Individual studies included in the meta-analyses were classified into one of the following four categories: self-identified pilot/feasibility studies or based upon sample size (N≤100, N>100, and N>370 the upper 75th of sample size). The VoE was defined as the absolute difference (ABS) between the re-estimations of summary ES restricted to study classifications compared to the originally reported summary ES. Concordance (kappa) of statistical significance between summary ES was assessed. Fixed and random effects models and meta-regressions were estimated. Three case studies are presented to illustrate the impact of including pilot/feasibility and N≤100 studies on the estimated summary ES.Results: A total of 1,602 effect sizes, representing 145 reported summary ES, were extracted from 48 meta-analyses containing 603 unique studies (avg. 22 avg. meta-analysis, range 2-108) and included 227,217 participants. Pilot/feasibility and N≤100 studies comprised 22% (0-58%) and 21% (0-83%) of studies. Meta-regression indicated the ABS between the re-estimated and original summary ES where summary ES were comprised of ≥40% of N≤100 studies was 0.29. The ABS ES was 0.46 when summary ES comprised of >80% of both pilot/feasibility and N≤100 studies. Where ≤40% of the studies comprising a summary ES had N>370, the ABS ES ranged from 0.20-0.30. Concordance was low when removing both pilot/feasibility and N≤100 studies (kappa=0.53) and restricting analyses only to the largest studies (N>370, kappa=0.35), with 20% and 26% of the originally reported statistically significant ES rendered non-significant. Reanalysis of the three case study meta-analyses resulted in the re-estimated ES rendered either non-significant or half of the originally reported ES. Conclusions: When meta-analyses of behavioral interventions include a substantial proportion of both pilot/feasibility and N≤100 studies, summary ES can be affected markedly and should be interpreted with caution.

scholarly journals The Impact of Public Expenditure on Economic Growth: A Review of International Literature

2019 ◽  
Vol 19 (2) ◽  
pp. 81-101
Author(s):  
Sheilla Nyasha ◽  
Nicholas M. Odhiambo
Keyword(s):  
Economic Growth ◽  
Empirical Evidence ◽  
Government Spending ◽  
Public Expenditure ◽  
Negative Impact ◽  
Positive Impact ◽  
Government Expenditure ◽  
Empirical Literature ◽  
The Impact ◽  
The Relationship

Abstract Research background: Although a number of studies have been conducted on the relationship between public expenditure and economic growth, it is difficult to tell with certainty whether or not an increase in public expenditure is good for economic growth. This lack of consensus on the results of the previous empirical findings makes this study of paramount importance as we take stock of the available empirical evidence from the 1980s to date. Purpose: In this paper, theoretical and empirical literature on the relationship between government expenditure and economic growth has been reviewed in detail. Focus was placed on the review of literature that assessed the impact of government spending on economic growth. Research Methodology: This study grouped studies on the impact of public expenditure on economic growth based on their results. Three groups emerged – positive impact, negative impact and no impact. This was followed by a review of each relevant study and an evaluation of which outcome was more prevalent among the existing studies on the subject. Results: The literature reviewed has shown that the impact of government spending on economic growth is not clear cut. It varies from positive to negative; with some studies even finding no impact. Although the impact of government spending on economic growth was found to be inconclusive, the scale tilts towards a positive impact. Novelty: The study provides an insight into the relationship between public expenditure and economic growth based on a comprehensive review of previous empirical evidence across various countries since the 1980s.

scholarly journals The relationship between diet, energy balance and fertility in men

2020 ◽  
Vol 90 (5-6) ◽  
pp. 514-526 ◽  
Author(s):  
Edyta Suliga ◽  
Stanisław Głuszek
Keyword(s):  
Energy Balance ◽  
Male Fertility ◽  
Sperm Count ◽  
Direct Analysis ◽  
Reproductive Hormones ◽  
Semen Parameters ◽  
The Right ◽  
Meta Analyses ◽  
The Impact ◽  
The Relationship

Abstract. Research conducted in recent years provides more and more evidence that diet can have a significant impact on male fertility. The aim of the study was to analyze the relationship between diet, energy balance and fertility in men. A comprehensive literature search of published studies in various languages, was carried out in electronic databases. The direct analysis included 96 works published between 2008 and 2018, including 12 randomized controlled trials and 23 systematic reviews and meta-analyses. A strong adherence to a healthy dietary pattern is positively correlated with total sperm count, progressive motility and total motile sperm count (all p < 0.05). However, attention is drawn to the fact that foods that are considered “healthy” can sometimes contain a significant amount of pollution, which negatively affect the semen parameters. An adequate intake of antioxidants or their supplementation have been quite effective in the prevention and treatment of male infertility. The improvement of pregnancy rate after antioxidant therapy ranged in various studies from 11% to 41%. An important problem, however, may be choosing the right dose of the supplement or finding an appropriate combination of antioxidants that may be more effective than any single antioxidant. The normalization of men’s body weight is beneficial for the quality of sperm and the concentration of male reproductive hormones. Further, long-term studies require the assessment of the impact of drastic weight loss after bariatric surgery on male fertility.

scholarly journals Smoking and Incidence of Insomnia: a systematic review and meta-analysis of cohort studies

2020 ◽  
Author(s):  
Nan Hu ◽  
Chunyi Wang ◽  
Yan Liao ◽  
Qichen Dai ◽  
Shiyi Cao
Keyword(s):  
Systematic Review ◽  
Cohort Studies ◽  
Fixed Effects ◽  
Meta Analysis ◽  
Significant Risk ◽  
Significant Risk Factor ◽  
Pooled Analysis ◽  
Study Characteristics ◽  
Meta Analyses ◽  
The Impact

Abstract Background: Both smoking and insomnia are worldwide problems and this study aims to investigate the impact of smoking on the incidence of insomnia. Methods: PubMed, EMBASE and OVID were searched through March, 2020. Cohort studies reporting the effect of smoking on the incidence of insomnia were included. We quantitatively analyzed the basic framework and study characteristics, and then pooled estimate effects with 95% confidence intervals (CIs) of outcomes of each included studies using fixed-effects meta-analyses. Results: This systematic review included six cohort studies involving 12445 participants. Quantitatively summarized results suggested smoking could significantly increase the incidence of insomnia (OR: 1.07, 95%CI: 1.02,1.13). Regular smoking was significantly associated with incidence of insomnia (OR=1.07, 95% CI:1.01,1.13). As for occasional smokers and ex-smokers, the pooled analysis didn’t indicate a significant association (occasional smoker: OR=2.09, 95% CI:0.44,9.95; ex-smoker; OR=1.02, 95% CI:0.67,1.54). Subgroup analysis by age, gender ratio and region showed statistically significant relationship between smoking and incidence of insomnia in specific groups. Conclusions: Integrated longitudinal observational evidence identified smoking as a significant risk factor of insomnia. Considering the limited amount of available studies, more high-quality and prospective cohort studies of large sample sizes are needed to explore details of this association.

scholarly journals Adolescent Sport Participation and Symptoms of Anxiety and Depression: A Systematic Review and Meta-Analysis

2020 ◽  
Vol 42 (3) ◽  
pp. 201-218
Author(s):  
Michael J. Panza ◽  
Scott Graupensperger ◽  
Jennifer P. Agans ◽  
Isabelle Doré ◽  
Stewart A. Vella ◽  
...  
Keyword(s):  
Systematic Review ◽  
Sport Participation ◽  
Causal Effect ◽  
Meta Analysis ◽  
Effect Sizes ◽  
Anxiety And Depression ◽  
Organized Sport ◽  
Protective Environment ◽  
Meta Analyses ◽  
The Relationship

Sport may protect against symptoms of mental disorders that are increasingly prevalent among adolescents. This systematic review explores the relationship between adolescent organized sport participation and self-reported symptoms of anxiety and depression. From 9,955 records screened, 29 unique articles were selected that included 61 effect sizes and 122,056 participants. Effects were clustered into four categories based on the operationalization of sport involvement: absence or presence of involvement, frequency of involvement, volume of involvement, and duration of participation. Results from the random-effects meta-analyses indicated that symptoms of anxiety and depression were significantly lower among sport-involved adolescents than in those not involved in sport, although this effect size was small in magnitude. Meta-regression was used to identify how age and sex explained heterogeneity in effects. Although these results do not signify a causal effect, they do support theorizing that sport participation during adolescence may be a protective environment against anxiety and depressive symptoms.

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