Contemporary rate plans are often modeled as linear equations ( ) for comparison: Spending on Telephone Service - Bureau of Labor Statistics

Research from the Bureau of Labor Statistics (BLS) shows that cellular phone expenditures increased rapidly in the early 2000s while traditional residential telephone spending decreased. This shift marked the transition of cellular phones from luxury items to essential utilities for all age groups. Modern Rate Plan Components

The pricing structure of cellular phone rate plans is a classic example of in microeconomics, specifically combining second-degree and third-degree strategies to capture consumer surplus. Economics of Rate Plan Pricing