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Abstract Details
Activity Number:
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527
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Type:
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Contributed
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Date/Time:
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Wednesday, August 3, 2011 : 10:30 AM to 12:20 PM
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Sponsor:
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Section on Statistical Consulting
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Abstract - #301777 |
Title:
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An Improved Estimator for the Number of Landowners Along a Railroad Right of Way
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Author(s):
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Marcus Nunes*+ and James Rosenberger and Durland L. Shumway
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Companies:
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Penn State University and Penn State University and Penn State University
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Address:
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418 Thomas Building, University Park, PA, 16802,
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Keywords:
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sampling ;
estimation ;
rails-to-trails ;
simulation
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Abstract:
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There are real-life situations where we are interested to know the number of experimental units that share a certain characteristic. In this work, a rails-to-trails organization would like to investigate the likelihood that property owners along an abandoned rail line would cooperate on converting the right of way to a hiking trail. However, finding the number of unique landowners of all segments is time consuming and expensive. The organization proposed a multi-sample procedure, based on the well-known Horvitz-Thompson estimator, to estimate the total number of landowners along the line. The sampling frame is based on a map with probability of landowner selection proportional to the length of each railroad segment traversing a single land parcel. Simulation studies show that this estimator is biased. We investigate another estimator, based on the same samples, which demonstrates better performance. This new estimator, with a bootstrap margin of error, is nearly unbiased, consistent and has lower MSE for estimating the total number of adjacent landowners, which is illustrated with several simulated situations.
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