Editorial

<title>Abstract</title> In this editorial we summarize and comment on papers published in issue 8.1. The first paper is ‘Predation in Space’ by Stefano Colombo. Next comes Arnab Bhattacharjee & Sean Holly's paper entitled ‘Understanding Interactions in Social Networks and Committees’. We then comment on the paper by Esteban Fernandez-Vazquez & Fernando Rubiera-Morollon entitled ‘Estimating Regional Variations of R&D Effects on Productivity Growth by Entropy Econometrics’ and the paper by Louis de Grange, David Boyce, Felipe González & Juan de Dios Ortúzar entitled ‘Integration of Spatial Correlation into a Combined Travel Model with Hierarchical Levels’. Finally we discuss the paper by Martin Watts, entitled ‘Assessing Different Spatial Grouping Algorithms: An Application to the Design of Australia's New Statistical Geography’.