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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. American Statistical Association is collaborating with JSTOR to digitize, preserve and extend access to Journal of the American Statistical Association.This article presents the results of a Monte Carlo study of the robustness of scale estimates in the presence of long-tailed, symmetric distributions. The article examines the performance of several families of estimates in samples of size 20 from several distributions. The family of A-estimators, finite sample approximations to the asymptotic variance of M-estimators of location, appears to be more robust than the sample standard deviation, the median absolute deviation from the median (MAD), trimmed standard deviations, and M-estimators of scale. The most successful A estimator uses the biweight weighting function, which is also the basis for high-performance robust location estimates.

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Much of our understanding of negotiation focuses on the process at the table involving a complicated set of interpersonal dynamics and strategies, or a “one‐dimensional” approach to the subject. Conceptually independent of one‐dimensional process factors is a second dimension of negotiation, “dealcrafting,” which focuses on substance in the effort to create joint value. A third dimension of negotiation, involving entrepreneurial moves “away from the table,” includes the first two dimensions but offers ways in which negotiators can change the game advantageously. Within this overall 3‐D perspective, the second dimension (dealcrafting) calls for a relentless focus on creating maximum value and an equally relentless focus on differences as means to create joint gains. Following their description of the overall 3‐D approach, the authors use numerous case examples to illustrate how principles of dealcrafting work in practice.