After the Corporate Average Fuel Economy standards became law in the late 1970s, automakers often restricted supply of big engines and big vehicles when they weren't selling enough fuel - efficient models. (automobilemag.com)
These cities are expensive because their economies generate strong demand for housing, which meets with restricted supply. (buildzoom.com)
That was when governments first attempted to restrict supply of agricultural products in order to boost prices for farmers, and thus force high prices on consumers. (macleans.ca)