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Huijgens, H.K.M. (author), van Deursen, A. (author), Minku, Leandro L. (author), Lokan, Chris (author)Context: The research literature on software development projects usually assumes that effort is a good proxy for cost. Practice, however, suggests that there are circumstances in which costs and effort should be distinguished. Objectives: We determine similar-ities and differences between size, effort, cost, duration, and num-ber of defects of...conference paper 2017