Vehicle registrations per $10,000 price bin for the states of Morelos, Mexico, and Mexico City. The red dotted line represents the exemption threshold price in Mexico City, while the blue dotted line represents the threshold for the state of Mexico. The figure illustrates missing registrations to the right of each state's exemption threshold. For the state of Morelos, higher registration values are observed for the most expensive vehicles, suggesting a potential avoidance of the registration fee.