Stacked-stacked bar graph is the working title of a visualization that builds on the strengths of a stacked bar graph. Where a stacked bar graph allows for a visual comparison of the parts to the whole, our proposed visualization further divides the parts to allow for additional points of comparison.
For more information, see:
Szigeti, S., Patrasc, J., Schnitman, D., and Diamond, S. 2014. “The Stacked-Stacked Bar Graph: A New Twist on an Old Visualization.” IEEE InfoVis Proceedings.