Modeling with Supply and Demand Learning Target: I can use supply and demand to model economic systems. Do Now What is a model? Modeling with Supply and Demand Readings As you read, lookup any words you don't know and add them to your notes. These questions should be answered on Microsoft Word or Google Docs and then shared with me on Canvas. Macroeconomics for Today Key Terms Model Ceteris Paribus Correlation Causation When you finish, think like an economist: 1. How can we explain the relationship between the Super Bowl winner and changes in the stock market? 2. Greeting card sales are another tried and true indicator, according to a vice president of American Greetings. Before a recession sets in, sales of higher-priced greeting cards rise. It seems that people substitute the cards for gifts, and since there is no gift, the card must be fancier. Do you think this is correlation or causation?