Konstantin Krivoruchko is a senior research associate on the Esri software development team who played a central role in developing ArcGIS� Geostatistical Analyst. Prior to joining Esri in 1998, he was director of the GIS laboratory at the Sakharov Institute of Radioecology in Minsk, Belarus, where he developed GIS and spatial statistics curriculum, supervised PhD and graduate school candidate research pertaining to GIS applications and spatial statistical data analysis.