(Figure: Understanding Price Ceilings and Floors) In the graph, if the government sets a price of $25, there is a surplus of 600 units. 
Definitions:
Clusters
Groups of similar objects, subjects, or events that are placed together based on certain criteria or characteristics.
Structured Interviews
An interview technique where every interviewed individual is asked a uniform set of questions, allowing for direct comparisons across different respondents.
Borderline Personality Disorder
A mental health disorder characterized by unstable moods, behavior, and relationships.
Sociologists
Social scientists who study human societies, their interactions, patterns, and systems, and how they affect behaviors and culture.
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