Use the following to answer questions:
Figure: The Market for Economics Textbooks 
-(Figure: The Market for Economics Textbooks) Look at the figure The Market for Economics Textbooks. Suppose the government believes textbooks are too expensive and it wants to make sure textbooks are affordable to more students. This type of price control is called a price _____, and one possible binding price control would be _____.
Definitions:
Convergence Theory
A theory suggesting that group members' opinions tend to become more similar over time as they interact and exchange ideas.
Contagion Theory
A theory suggesting that emotions and behaviors can spread through groups as if they were infectious diseases.
Rumors
Unverified information or stories spread informally, typically reflecting people’s desires to understand or make sense of their social environment.
Mass Hysteria
A phenomenon where a group of people exhibit similar hysterical symptoms or behaviors, often as a reaction to fear, rumor, or unknown events.
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