Predicted change in concentration of retail wireless labor market if Sprint and T-Mobile merge, by commuting zone
*Commuting zones without both active Sprint and T-Mobile stores
Note: The map shows, for each commuting zone, the change in the Herfindahl-Hirschman Index, a standard measure of market concentration, applied in this context to labor market concentration. A change of more than 200 HHI would trigger enforcement concerns per the Justice Department/Federal Trade Commission Horizontal Merger Guidelines.
Source: Change to Win 2018