Longitudinal studies, where data are repeatedly collected on one subject over a period, are common in medical research. When effect of a time-varying exposure on an outcome of interest is measured at different time points, standard statistical methods fail to give robust estimate in the presence of time-dependent confounders. There is alternative method avoid, that is, inverse probability weigh...

A concept known as ‘marginal gains’, an approach to performance improvement in elite sport came to prominence during the London 2012 Olympics when Team GB cycling won a record eight gold medals. Since National Lottery funding was awarded in 1997 to develop British cycling, the ethos of making aggregated small gains in many areas to improve overall performance has been central to its success. Th...

Full terms and conditions of use: http://pubsonline.informs.org/page/terms-and-conditions This article may be used only for the purposes of research, teaching, and/or private study. Commercial use or systematic downloading (by robots or other automatic processes) is prohibited without explicit Publisher approval. For more information, contact [email protected]. The Publisher does not warr...

Consider the set of probability measures with given marginal distributions on product two complete, separable metric spaces, seen as a correspondence when vary. Bergin (Econ Theory 13: 471–481, 1999) established continuity this correspondence, and in note, we present novel considerably shorter proof important result.

The purpose of this study was to test a structural model to determine which psychosocial constructs affected the purchase intention of athletic team merchandise (ATM). Results from the analyses indicated that the twelve-factor ATM model fit the data from collegiate athletic events well, explaining the various impact factors that lead to purchase intention of athletic team merchandise among spor...

Innovation is a process through which the nation creates and transforms new knowledge into useful products, services and processes for national and global markets – leading to both value creation for stakeholders and higher standards of living. The difference between invention and innovation is that invention is a new product, whereas innovation is a new value (Szmytkowski, 2005). To turn inven...

Tensor product smooths provide the natural way of representing smooth interaction terms in regression models because they are invariant to the units in which the covariates are measured, hence avoiding the need for arbitrary decisions about relative scaling of variables. They would also be the natural way to represent smooth interactions in mixed regression models, but for the fact that the ten...

INTRODUCTION ket structure can be maintained concurrent with a patent system. The first is public perception. This paper examines the issues surrounding The patent is not viewed as government regulathe patenting of life forms, specifically the social tion with a purpose, but as a fundamental part of and private costs and benefits of the Plant Varithe institution of private property; not as the ...

Applied economists often wish to measure the effects of policy changes (like trade liberalization) or managerial decisions (like R&D expenditures or exporting) on firmlevel productivity patterns. But firm-level data on physical quantities of output, capital, and intermediate inputs are typically unobservable. Therefore, when constructing productivity measures, most analysts proxy these variable...

Abstract In this paper, we introduce the notion of a marginal tube, which is hypersurface foliated by surfaces. It generalises marginally trapped tube and several notions black hole horizons, for example trapping isolated dynamical etc. We prove that if every spacelike section surface, then null. There no assumption on topology tube. To it, study geometry surfaces in four-dimensional spacetime ...