Search results for "SAMPLE"
showing 10 items of 2270 documents
Triggering Open Innovation Processes Through Organizational Emotional Capability and Rival's Absorptive Capacity Orientation
2022
In this article, we analyze the direct effects of the open innovation (OI) processes of acquisition and exploitation on innovation performance (IP), as well as the effects of two antecedents of OI: organizational emotional capability (EC) and rivaĺs absorptive capacity orientation (RACO). RACO implies processing external information in an analytical manner, whereas an intuitive approach is implicit in EC. The research model is tested in a sample of medium-low-technology Colombian small and medium-sized enterprises (SMEs) using structural equations by the consistent partial least squares method. Our results provide evidence on a significant effect of the OI acquisition process on IP, as well…
Ensuring content validity of psychological and educational tests – the role of experts
2020
Many test developers try to ensure the content validity of their tests by having external experts review the items in terms of relevance, difficulty, clarity, and so on. Although this approach is widely accepted, a closer look reveals there are several pitfalls that need to be avoided if experts’ advice is to be truly helpful. First, I offer a classification of tasks experts are given by test developers as reported on in the literature dealing with procedures of drawing on experts’ advice. Second, I review a sample of reports on test development (N = 72) to identify the common current procedures for selecting and consulting experts. Results indicate that often the choice of experts seems to…
Substitution–dilution method to correct the matrix effect in multi-element quantitative analysis by X-ray fluorescence
2001
Abstract A mathematical model based on the dilution–addition method (DAM) for multi-elemental analysis using an X-ray fluorescence technique is proposed. The conditions for sample preparation do not require both the unknown and standard samples to be similar in composition and mineralogy, and the unknown sample is replaced quantitatively by the standard sample, hence the denomination substitution–dilution method (SDM). This method makes it possible to correct the matrix effect in multi-elemental quantitative analysis by X-ray fluorescence for each analyte. The proposed model presents hyperbolic behaviour of the experimental data when the X-ray fluorescence intensities are represented versus…
Determination of metabolite concentrations in human brain tumour biopsy samples using HR-MAS and ERETIC measurements.
2009
Accurate determination of the concentration of the metabolites contained in intact human biopsies of 10 glioblastoma multiforme samples was achieved using one-dimensional 1H high-resolution magic angle spinning (HR-MAS) NMR combined with ERETIC™ (electronic reference to in vivo concentrations) measurements. The amount of sample used ranged from 6.8 to 12.9 mg. Metabolite concentrations were measured in each sample using two methods: with DSS (2,2-dimethyl-2-silapentane-5-sulfonate sodium salt) as an internal reference and with ERETIC™ as an external electronically generated reference. The ERETIC™ signal was shown to be highly reproducible and did not affect the spectral quality. The concent…
Principales problemas de internacionalización de las cooperativas agroalimentarias españolas
2013
Food and agricultural cooperatives, as well as other food companies must consider internationalization as essential for them for their survival; and although there are governmental and private agencies that can support them in this challenge, it is necessary to deeply study the problems that cooperatives face in international markets. Using a methodology that combines theoretical review with qualitative research, the main problems from a sample of internationalized Spanish cooperatives are identified and classified by differentiating the internal from the external ones so as in the near future the necessary measures to minimize or avoid them could be taken by managers and support agencies. …
Skewness in financial returns
1999
Abstract In this paper the symmetry of daily returns is addressed in eight international stock markets and three spot exchange rates. Tests of symmetry with the sample skewness seem of little value, due to the non-normality of the returns. Under alternative non-normal distributions, the symmetry of the returns cannot be rejected for most markets. Distribution-free procedures do not detect strong asymmetries in most of the series either; however, some differences between returns below the mean and returns over the mean are observed in several markets
US-Based Fast Food Restaurants: Factors Influencing International Expansion of Franchise Systems
2010
Studies of international franchising are scant, but growing, and can be divided into two main streams of research: those focused on environmental predictors of internationalization and those focused on strategic, firm level characteristics. Belonging to the latter category, this study empirically examines a set of firm level attributes as predictors of the decision-making on whether or not firms seek international expansion. Using longitudinal data from Bonds’ Franchise Guide 2001-2008, we draw upon a sample of U.S. based fast food franchise systems for testing our hypotheses. Specifically, our database is comprised of 1058 observations for 158 chains and we estimate a semi-parametric logis…
Antecedents and consequences of virtual customer co-creation behaviours
2019
Purpose The purpose of this paper is to compare the antecedents and consequences of two distinct types of virtual co-creation behaviours that require different degree of effort from the customer, i.e. customer participation (CPB), and customer citizenship (CCB) behaviour, in a cross-cultural study. Design/methodology/approach A survey was conducted among members of online panels in the UK and Spain, reaching a sample of 800 online individuals who participate in online co-creation processes with fashion retailers. This design allows us to test the cross-cultural effects. Multi-group structural equations modelling was used to analyse the data. Findings Virtual co-creation behaviours are driv…
Ajuste psicosocial de adolescentes agresores a través del teléfono móvil y de internet
2019
El presente estudio tiene como objetivo principal analizar el perfil psicosocial de adolescentesagresores de cyberbullying, teniendo en cuenta los siguientes indicadores de ajuste psicosocial:satisfacción con la vida, reputación social no conformista y conductas antisociales dentro y fueradel contexto escolar. La muestra está formada por 896 estudiantes españoles (49.7% chicos y50.3% chicas), de edades comprendidas entre los 11 y los 19 años (M = 13.9, DT = 1.5). Seencuentran diferencias significativas entre los grupos de ciberagresores y no agresores; losciberagresores severos, seguidos de los cibereagresores ocasionales, muestran el ajuste psicosocial más conflictivo en todas las variable…
The continuous sample of working lives: Improving its representativeness
2017
This paper studies the representativeness of the Continuous Sample of Working Lives (CSWL), a set of anonymized microdata containing information on individuals from Spanish Social Security records. We examine several CSWL waves (2005–2013) and show that it is not representative for the population with a pension income. We then develop a methodology to draw a large dataset from the CSWL that is much more representative of the retired population in terms of pension type, gender and age. This procedure also makes it possible for users to choose between goodness of fit and subsample size. In order to illustrate the practical significance of our methodology, the paper also contains an applicatio…