Use the following to answer questions:
Figure: Traffic Lights in Plymouth 
-(Figure: Traffic Lights in Plymouth) Look at the figure Traffic Lights in Plymouth. Plymouth has 1,000 residents. Each of the residents has the same individual marginal benefit per traffic light. If the town's population doubles and the new residents share the identical individual marginal benefit of the existing residents, the socially efficient quantity of traffic lights will:
Definitions:
Two-Part Tariff
Form of pricing in which consumers are charged both an entry and a usage fee.
Bundling
A marketing strategy that involves offering several products or services for sale as one combined product or service package.
Marginal Cost
The added cost of producing one additional unit of output.
Marginal Revenue
The incremental income achieved by dispensing one more unit of a good or service.
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