Public goods are defined as products that are nonrival and nonexcludable, like the global position system (GPS) operated by the US federal government. The nonrival nature means that it isn’t costly for the government to provide the service to an additional user and the nonexcludability component means that anyone can access that service even if they don’t pay taxes to support the service. While GPS was initially developed for military purposes, the government has made the technology available for anyone with a GPS received and companies have created new products and services based on that technology.
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