Some commodities have not increased in price for decades because the production cost is relatively stable. For example, the production cost of a one-dollar lighter mainly includes plastic casing, metal parts, match heads and so on. These costs are relatively stable and will not change greatly because of the fluctuation of raw material prices, so the price of lighters is relatively stable.

2. The process and technology are mature.

Some commodities don't increase prices for decades because the technology and technology are relatively mature. For example, traditional iron pots and iron pots have relatively mature production technologies and processes, and do not need too much R&D investment and production costs, so the prices are relatively stable.

3. Brand effect and channel advantages

Some commodities have not increased their prices for decades because of their strong brand effect and channel advantages. For example, some well-known brands of cosmetics and perfumes have strong brand effects and channel advantages, which can attract consumers and maintain stable sales, so the prices are relatively stable.

4. The market competition is not fierce.

Some commodities have not increased their prices for decades because the market competition is not fierce. For example, traditional Chinese herbal medicines, dry goods and so on. , the competitiveness in the market is relatively small, because its production and sales require higher professional skills and experience, and the entry threshold is higher, so the price is relatively stable.

5. The price policy is stable

Some commodities have not increased in price for decades because the price policy is relatively stable. For example, the prices of public transportation and electricity are controlled by the government and will not be affected by market fluctuations, so the prices are relatively stable.

6. Consumer demand remains unchanged

Some commodities have not increased in price for decades because consumer demand is relatively stable. For example, the consumption demand of some basic foods and daily necessities is relatively stable, because people's basic needs will not change much over time, so the prices are relatively stable.

In short, some commodities have not increased their prices for decades because of the comprehensive effects of many factors, such as stable production cost, relatively mature technology, brand effect and channel advantage, less fierce market competition, stable price policy, unchanged consumer demand and so on. The prices of these commodities are relatively stable, which brings convenience and benefits to consumers, but we also need to pay attention to the quality and safety of commodities.