Search results for "Regression analysis"
showing 10 items of 807 documents
Effect of sport-tinted contact lenses for contrast enhancement on retinal straylight measurements
2008
PURPOSE: To investigate the effect of two tinted contact lenses (CL) designed for outdoor sports activity on the psychometric determination of retinal straylight using the compensation comparison method. METHODS: Thirteen emmetropic subjects were randomly fitted with two different tinted Nike Maxsight (Bausch & Lomb, Rochester, NY, USA) CL in one eye, while the contralateral eye was fitted with a clear lens made of the same material (Optima 38, Bausch & Lomb). Three valid straylight measurements were taken on each eye before and a few minutes after lens insertion, when lens stabilization had occurred. RESULTS: The subjects' mean straylight values were 0.90 +/- 0.09 at baseline and 0.95 +/- …
Expression of the multidrug resistance glycoprotein 170 in the peripheral blood lymphocytes of rheumatoid arthritis patients. The percentage of lymph…
1996
International audience; Abstract: The objective was to evaluate the expression of the multidrug resistance P-glycoprotein (P-gp) in peripheral blood lymphocytes (PBL) of patients with rheumatoid arthritis (RA). PBL from 68 RA patients and 44 controls were evaluated. RA patients had a mean disease duration of 10.7 yr, with a mean number of past resistances to DMARDs of 0.82, and were treated with NSAIDs (n = 34), DMARDs (n = 25) and prednisolone (n = 40). Fluorescence flow cytometry was used to assess P-gp membrane expression on PBL. In the RA group, the percentage of PBL expressing P-gp was higher in patients treated with prednisolone than in other patients [mean +/- S.D.: 10.7 +/- 15.8% vs…
Waist-to-height ratio and cardiovascular risk factors in elderly individuals at high cardiovascular risk
2012
Introduction: Several anthropometric measurements have been associated with cardiovascular disease, type-2 diabetes mellitus and other cardiovascular risk conditions, such as hypertension or metabolic syndrome. Waist-to-height-ratio has been proposed as a useful tool for assessing abdominal obesity, correcting other measurements for the height of the individual. We compared the ability of several anthropometric measurements to predict the presence of type-2 diabetes, hyperglycemia, hypertension, atherogenic dyslipidemia or metabolic syndrome. Materials and Methods: In our cross-sectional analyses we included 7447 Spanish individuals at high cardiovascular risk, men aged 55-80 years and wome…
Effect of Software on CSP Performance
2009
In order to verify how (if at all) CSP's investments in software affect their business performance, the relationship between (i) CSP's spending on software and (ii) its key performance indicators (KPIs) is considered below. The investments in software are represented by internal, external, and total software spending a year or two years prior to the KPI values, while the KPIs include average revenue per user (ARPU), revenue, net income, EBIDTA, and change in revenue (as an indicator of company growth). Besides, Opex and Capex along with R&D expenses are used as control variables. We use the data collected for the years 2004–2007 (revenue, net income, EBITDA, market capitalization, R&D, CAPE…
Corporate governance and financial performance: The role of ownership and board structure
2018
Abstract This study examines how corporate governance and ownership structure relate to the financial performance of firms. We estimated this relationship using fsQCA. We enhanced our analysis using complementary linear and non-linear multiple regression analysis. The panel data used in this study covered 1207 companies from 59 countries across 19 sectors for the period 2013 to 2015. The study makes two main contributions. First, the multiple empirical techniques employed in this study offer a broader approach to the empirical analysis of financial performance. Second, the study aids our understanding of the role of corporate governance and ownership in the financial performance of firms.
Dynamics of price sensitivity among mobile service customers
2005
PurposePrice sensitivity is one of the key factors affecting to companies pricing choices. Yet in mobile services sector business practitioners are facing problems in pricing decisions as they are short of knowledge on their customers’ price sensitivity levels and dynamics. Therefore this study aims to focus on this unexplored field in order to provide more accurate tools for mobile service providers to price their services more effectively.Design/methodology/approachThis study is conducted on Finnish mobile services markets. The focus is on examining how customers’ price sensitivity differs between different customer segments and which factors affect to the price sensitivity levels. The sa…
The determinants of conversion rates in SME e-commerce websites
2018
Abstract Web retailers invest significant resources to improve the proportion of website visitors that make a purchase, also known as the conversion rate. Improving this rate is particularly important to SMEs that have traditionally lagged behind larger firms as they have found it difficult to justify the significant investment involved in website development against the historical low returns associated with an online sales channel. Identifying methods that increase conversion rates reduces these perceived barriers and increases effective SME participation in the growing e-commerce sector. This paper uses 1184 observations from 6 SME websites to identify and analyse the factors, or combina…
Three decades of subsidiary exits: Parent firm financial performance and moderators
2020
Abstract This study aimed to find important constructs and relationships among models of subsidiary divestment during the period from 1989 to 2018 using correlation matrices of 80 studies, the selection of which was based on six criteria. It revealed eight important constructs, namely firm innovativeness, environmental factors in the target country, type of experience, organizational characteristics, investment strategy, parent firm financial performance, subsidiary divestment, and the moderating effects of advertising intensity and product diversification. Furthermore, it shed light on seven relationships that should be considered in future attempts to assess parent performance related to …
The effect of high performance work systems on small and medium size enterprises
2015
Abstract This study analyzes the processes that explain high performance work system (HPWS) effect on company performance in small and medium size enterprises (SMEs). This study tests this relationship in SMEs by selecting three high performance work practices (HPWP) and an outcome variable based on the return on investment. A regression model with a sample of 78 companies tests the hypothesis. Results confirm the positive effect of HPWP on the performance of SMEs.
Performance analysis of research spin-offs in the Spanish biotechnology industry
2012
Abstract This study examines whether the performance of biotechnology research spin-offs in Spain differs from non spin-off firms, using empirically-based fieldwork over a 5-year period and standard dichotomous regression analysis on 7-year data. Biotechnology research spin-offs in Spain are not necessarily located in core regions, are smaller in size and tend to grow faster in terms of turnover. Corporate groups seldom control them but venture capitalists have a greater tendency to acquire shareholdings in them. Compared to non spin-off firms, research spin-off firms face more serious and more numerous challenges and disadvantages. Only two advantages are apparent: their capacity to attrac…