The widespread availability of cell phone service and the relatively low cost of such service means that some people are now indifferent as to whether they make a call on a landline or a mobile telephone. In fact, many people have substituted one or more wireless cell phones for their traditional household wired telephones (also called "residential landline telephones"). These cell phone only households pose a problem for most major survey research organizations in the United States because cell phone numbers are not typically included when conducting random-digit dial (RDD) telephone surveys in the United States.
The Telephone Consumer Protection Act of 1991 prohibits the use of autodialers in the United States when calling cell phones; therefore, the inclusion of such telephone numbers would be very ...
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