Large energy companies have drilled thousands of wells to exploit the Marcellus Shale formation. A Pennsylvania motel operator finds that her previously struggling motel is suddenly fully booked most of the time with people who are working for these natural gas operations. This is an example of

Large energy companies have drilled thousands of wells to exploit the Marcellus Shale formation. A Pennsylvania motel operator finds that her previously struggling motel is suddenly fully booked most of the time with people who are working for these natural gas operations. This is an example of



Answer: an externality


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