There can be several reasons why prices are not coming down. Here are a few key factors that can contribute to this phenomenon:

1. Supply and demand dynamics: Prices are primarily determined by the interaction of supply and demand in a market. If the demand for a product or service remains high while the supply is limited, prices tend to stay elevated. For example, during periods of high demand, such as holiday seasons, prices for popular products like electronics or toys may not decrease significantly due to the limited availability.

2. Production costs: The cost of producing goods or services plays a significant role in determining their prices. If the production costs increase, it can lead to higher prices for consumers. Factors that can contribute to rising production costs include raw material prices, labor costs, energy expenses, and regulatory compliance. For instance, if the cost of raw materials like steel or oil increases, it can result in higher prices for products like cars or gasoline.

3. Market power and competition: In markets with limited competition or where a few dominant players have significant market power, prices may not come down easily. These players can control prices and keep them at higher levels to maximize their profits. For example, in industries like pharmaceuticals or telecommunications, where a few companies have a strong market position, they may have the ability to maintain higher prices.

4. Inflationary pressures: Inflation, which is the general increase in prices over time, can also prevent prices from coming down. When the overall price level in an economy rises, businesses may adjust their prices to maintain their profit margins. Inflation can be influenced by factors like government policies, changes in interest rates, or fluctuations in currency values.

5. Psychological factors: Consumer behavior and perception can influence prices as well. If consumers perceive a product or service to be of high value, they may be willing to pay higher prices, even if the production costs do not justify it. Branding, marketing, and the perception of quality can all contribute to this phenomenon.

It is important to note that these factors are not exhaustive, and the reasons for prices not coming down can vary across different industries, regions, and time periods. Additionally, the interplay of these factors can be complex and can vary from one situation to another.

References:
- Mankiw, N. G., & Taylor, M. P. (2014). Economics (3rd ed.). Cengage Learning.
- Krugman, P., & Wells, R. (2012). Microeconomics (3rd ed.). Worth Publishers.