Joshua Keating Slate.Com A recent paper by political scientists Guy Grossman of the University of Pennsylvania and Janet Lewis of the Naval Academy (via Chris Blattman) looks at a fascinating but little-noticed phenomenon. Countries all over the world seem to be dividing themselves into smaller and smaller political units: This trend has been particularly pronounced in Sub-Saharan Africa, where almost half of countries increased their number of administrative units by over 20% since the mid-1990s. however it is not unique to Africa; for example, as part of their post-communist decentralization reforms, Czechoslovakia and Hungary increased More…