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The association with a group of able colleagues have scientific and economic value, and has undoubtedly contributed for academic promotion and pay raise. Some economic perspective to bear on the value of good colleagues, basically the provision of helpful commentary on working papers has been discussed.

Abstract: We explore the consequences of including both general and specific controls for spatial autocorrelation in country-level models of species imperilment. A general spatial autocorrelation term constructed as a binary contiguity matrix aggregates an unknown number of possible influences, some of which exert a negative impact on species imperilment in the referent country, others of which exert a positive impact. Adding spatial dependency measures that are based on specific cross-border effects can substantially change not only the size and statistical significance of the general spatial dependency term but also the size, sign, and/or statistical significance of the explanatory variables. [Copyright &y& Elsevier]