Explain economically why hotel accommodation and air tickets will increase in price on Friday and Saturday.

Friday and Saturday are the prime time of holiday economy, and people usually use this time to travel, shop and relax. This phenomenon has led to a sharp increase in demand, especially for hotel accommodation and air tickets. Here are some economic explanations:

1. demand law: under the influence of holiday economy, people's demand for hotel accommodation and air tickets increases. According to the law of demand, when the demand increases, the price will also rise. This is the result of market supply and demand balance.

2. Scarcity: During the holiday economy, some resources (such as hotel rooms and flight seats) are scarce. Because these resources are limited, the supply can't meet the growth of demand, so the price rises.

3. Demand forecast: Hotels and airlines usually forecast the demand during the holiday economy in advance and adjust the prices accordingly. They may raise prices to offset higher operating costs and take advantage of high demand periods to get higher profits.

4. Price discrimination: In some cases, hotels and airlines may implement price discrimination, that is, charge different prices to different consumer groups for the same product or service. For example, prices on Fridays and Saturdays may be higher than those on other dates to attract consumers with stronger willingness to travel or higher ability to pay.

In a word, the rise of hotel accommodation and air ticket prices on Friday and Saturday is the inevitable result of holiday economy phenomenon, which reflects the comprehensive influence of supply and demand, scarcity, demand forecast and price discrimination.