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R&D expenditure and sales : a nonparametric analysis
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The value relevance of research and development expenditures : a comparative analysis of Korean, Japanese, Chinese, and US manufacturers
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Public's willingness to pay for preventing climate change
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Consumers' preferences for the attributes of post-PC : results of a contingent ranking study
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Modelling willingness to pay responses from dichotomous choice contingent valuation surveys with zero observations
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