# Combustion road vehicles and Polypropylene

Their prices have moved together.

Source page: https://www.materialinsights.org/links/combustion-road-vehicles-and-polypropylene/

[Combustion road vehicles](https://www.materialinsights.org/energy/e_road_ice/) (energy) and [Polypropylene](https://www.materialinsights.org/chemicals/polypropylene/) (chemical): 1 relationship.

## How they are linked

### 1. Price link: end use

*Cost and price · Weak · Both ways*

Cars use polypropylene for bumpers, dashboards and battery cases. The vehicle price proxy does not move with the resin proxy, -0.02 monthly, because car prices are set by model cycles, not by resin costs.

- **-0.02** monthly change correlation
- **0.02** 12-month change correlation
- **1.18** fitted elasticity

Built from the site data on production routes, energy flows, industry value chains, input-output tables and prices.