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 (освобождение) prices leads to their decrease. 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.