Are there any famous economic cases? Can use supply and demand curve, consumer equilibrium, consumer behavior, elasticity, production theory, cost theory, etc.

From June 5438 to February 2008, KFC took the lead in introducing price reduction measures, and its New Year coupons and breakfast coupons will be issued until the end of February 2009, with the highest discount rate of 6.4%. At the same time, McDonald's only launched premium packages in Nanjing, Guangzhou and Shenzhen markets, which are available for a limited time. It was not until two months later that this preferential treatment was extended to the whole country. On February 5th, Yum! The parent company of KFC announced that its sales in China increased by 7% in 2008, down from 65,438+02% in the previous year. McDonald's latest financial report for the fourth quarter of 2008 also shows that the sales of McDonald's stores in China slowed down last quarter. Jim, CEO of McDonald's? Skinner recently said in a publicity campaign in the United States that he would use new strategies to attract more diners in the context of the global economic recession. Zhang Jiayin, vice president and chief marketing officer of McDonald's (China) Co., Ltd., estimates that the sharp price reduction is expected to increase McDonald's sales by about 5% because consumers are more sensitive to price during the economic crisis. In addition to increasing single-store sales through price reduction, McDonald's seems to be planning to win by quantity. Globally, McDonald's has 3 1 1,000 stores, far exceeding KFC's 1. 1 1,000 stores. But in China, McDonald's has only 1065 stores, while KFC has more than 2,300 stores in China. In 2009, McDonald's plans to open a record 65,438+075 new stores in China, becoming the region with the largest number of new stores in the global market in 2009, and recruiting more than 65,438+00,000 employees for new stores. Obviously, in McDonald's view, the China market has ushered in a good opportunity for rapid expansion. Xerox said that the profits and human resources accumulated by McDonald's in recent years provided opportunities for its rapid expansion. The net profit of McDonald's in the fourth quarter was $985.3 million, and the sales revenue of all branches in the world increased by 7.2%, among which the Asia-Pacific region where China market is located increased by 65,438+00%.