1. The fashion for mini-skirt (reduced) the demand for textile materials.
2. Even in (some) middle-income countries many people are very poor.
3. Government regulations sometimes (impose) a change in (technology) that producers do not want to use.
4. Stabilization of prices is of great importance to industrial nations (as well as) to the Third World countries.
5. Freeing up prices leads to their (increase).
6. (Inferior) goods are usually low-quality goods for which
there are higher-quality (substitutes) sold at higher
prices.
7. A decrease in ( input) prices makes the production less expensive.