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Welfare economics explains which of the following in the market for DVDs?
U.S. Consumers
Individuals or households in the United States that purchase goods and services for personal use.
Technological Advances
Progress in technology that enhances the efficiency of processes, products, or services.
Nest's Doorbell
A smart home device manufactured by Nest Labs that allows homeowners to see, hear, and speak to visitors at their door remotely via a smartphone app.
Substitute
A product or service that can be used in place of another to satisfy the same need or desire, often influencing consumer choice and market dynamics.
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