See why a hierarchical structure designed for XML could be a better choice than a relational database. Written by Brian Schaffner, Contributor Oct. 9, 2001, 5:00 p.m. PT ...

A Sunburst chart represents hierarchical data. We show you how to create and insert a Sunburst chart in PowerPoint.

PowerPoint offers preset hierarchical chart templates, so you won't even have to set one up yourself. Simply corral the Excel information you need and merge it in with PowerPoint.

Community ecologists and conservation biologists often work with data that are too sparse for achieving reliable inference with species-specific approaches. Here we explore the idea of combining ...

Michael J. Daniels, Constantine Gatsonis, Hierarchical Generalized Linear Models in the Analysis of Variations in Health Care Utilization, Journal of the American Statistical Association, Vol. 94, No.