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 ) 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.