Industry based economic drainage zones maybe? Oil/gas industry ends up in Houston. Lobbyists end up in their state’s capitol or D.C., etc. In a geological drai

Industry based economic drainage zones maybe? Oil/gas industry ends up in Houston. Lobbyists end up in their state’s capitol or D.C., etc. In a geological drainage basin, gravity is the constant. Not sure what is analogous in economics besides the obvious “money” but there are plenty of outliers to point out there whereas gravity doesn’t have as many.