Lars Rönnbäck is a researcher in divergent information at Stockholm University, Sweden, and a consultant in information modeling. He has been working with some of the largest organizations in Sweden and their challenges as far back as Y2K. Over the last decade, Mr. Rönnbäck’s research has focused on how to manage information that is uncertain, imprecise, conflicting, and varying over time. This research has resulted in new modeling techniques that provide a closer-to-reality record of events, most notably anchor and transitional modeling. He has also written a book about how young children learn to count. He can be reached at lars@uptochange.com.