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Rogers's model of new product diffusion, although widely accepted in the marketing literature, has several limitations which are seldom recognised. These limitations are examined, and Rogers's approach is compared to the model of diffusion proposed by Bass. The authors conclude that Rogers's model lacks predictive validity and that its prescriptive(More)
Mechanical forces influence articular cartilage structure by regulating chondrocyte activity. Mechanical stimulation results in activation of an alpha5beta1 integrin dependent intracellular signal cascade involving focal adhesion kinase and protein kinase C, triggering the release of interleukin-4 from the cell. In normal HAC the response to physiological(More)
The prevalence of faulty citations impedes the growth of scientific knowledge. Faulty citations include omissions of relevant papers, incorrect references, and quotation errors that misreport findings. We discuss key studies in these areas. We then examine citations to " Estimating nonresponse bias in mail surveys, " one of the most frequently cited papers(More)
Prior research found that people's assessments of relative competence predicted the outcome of Senate and Congressional races. We hypothesized that snap judgments of "facial competence" would provide useful forecasts of the popular vote in presidential primaries before the candidates become well known to the voters. We obtained facial competence ratings of(More)
The Bass model is a popular diffusion model that has been extensively tested on American and European time series data, with promising results. This study attempts to extend the generalisability of the model by examining its performance using time series data from high technology New Zealand innovations. The results demonstrate that the Bass model can(More)
By drawing on an empiricist tradition, and on the literature discussing the philosophical problems of marketing knowledge, we seek to develop practical guidelines for developing empirical generalisations. In particular we suggest three criteria for the development of marketing knowledge: ensuring falsifiability and theoretical competition; overcoming(More)
New Zealand shares a common problem with other countries: a shortage of blood donors. Approximately 4% of New Zealand's total population donate blood, yet up to 20% may need to receive donated blood or blood products. However, there has been little success in accurately predicting willingness to donate blood, and greater knowledge is needed of those(More)
BACKGROUND Recent studies provide evidence of roles for integrins in mechanical signalling in bone and cartilage. Integrin signalling is modulated by various mechanisms, including interaction with other transmembrane proteins. We aimed to identify whether one such protein, integrin-associated protein (CD47/IAP), is expressed by chondrocytes and whether it(More)
Smith's idea of segmentation has been steadily refined into Kotler's target marketing, and widely adopted by academics and practitioners. However, this approach has not been empirically justified, and is logically invalid in its simple forms. In this paper, a logically valid approach to target marketing is developed, and the conditions required for such an(More)