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On-Site Sampling in Economic Valuation Studies
Stockholm University, Faculty of Social Sciences, Department of Statistics.
2007 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

A commonly used sampling design in economic valuation studies is on-sitesampling. If this sampling design is used, the sampling inclusion probabil-ities may be correlated with respondents’ valuations, invalidating welfaremeasures derived from estimates of the probit model. This problem is re-ferred to a length-bias, a problem discovered in other fields of applicationof statistics.The first paper in this thesis outlines different application fields thathave length-bias problems and the suggested model solutions in the litera-ture are presented.The second paper of this thesis proposes a model based on the bivariateordinal probit, a model that can be used to analyze binary choice CV datagathered by on-site sampling. The models is presented, the log-likelihoodis derived, and the properties of the MLE’s are illustrated using a smallsimulation study. The simulation results show the proposed estimator tobe an interesting alternative.

Place, publisher, year, edition, pages
Umeå: Umeå universitet , 2007. , 11 p.
Series
Statistical studies / Department of Statistics, University of Umeå, ISSN 1100-8989 ; 36
Keyword [en]
Sample inclusion; Length-bias; Poisson dis- tribution; ML-estimation; Bivariate ordered probit; CVM.
National Category
Social Sciences
Research subject
Statistics
Identifiers
URN: urn:nbn:se:su:diva-87056ISBN: 978-91-7264-405-2 (print)OAI: oai:DiVA.org:su-87056DiVA: diva2:600728
Supervisors
Available from: 2013-01-31 Created: 2013-01-25 Last updated: 2013-01-31Bibliographically approved
List of papers
1. Length-Biased Sampling: A Review
Open this publication in new window or tab >>Length-Biased Sampling: A Review
2007 (English)Report (Other academic)
Abstract [en]

A frequent sampling design problem is length-biased sampling. This meansthat the probabilities of sample inclusion of population units are relatedto the values of the variable being measured. Parameter estimates maybecome biased and inconsistent if this sampling problem is ignored. Thispaper contains a review of applications characterized by length-biased samplingand the suggested solutions. The paper also includes a small simulationstudy on the properties of corrected mean estimators under misspecifiedsampling inclusion probabilities. Results indicate the importance ofcorrectly specified sampling inclusion mechanisms.

Keyword
Length-bias, On-site, Sample inclusion, Poisson distribution
National Category
Social Sciences Social Sciences
Research subject
Statistics
Identifiers
urn:nbn:se:su:diva-87053 (URN)
Available from: 2013-01-25 Created: 2013-01-25 Last updated: 2013-01-31
2. A Binary Ordinal Probit Model for CVM Data Based on On-Site Samples
Open this publication in new window or tab >>A Binary Ordinal Probit Model for CVM Data Based on On-Site Samples
2007 (English)Report (Other academic)
Abstract [en]

A commonly used sampling design in economic valuation studies such as theCVM, is on-site sampling. If this sampling design is used, the sampling inclu-sion probabilities may be correlated with respondents’ valuations, invalidatingwelfare measures derived from estimates of the probit model. This paper pro-poses a model based on the bivariate ordinal probit, a model that can be usedto analyze binary choice CV data gathered by on-site sampling. This paperpresents the model, derives the log-likelihood, and illustrates the MLE using asmall simulation study. The model is presented, the log-likelihood is derived andthe properties of the MLE’s are illustrated with a small simulation study. Thesimulation results show the proposed estimator to be an interesting alternative,but the estimator should be evaluated in more population models.

Keyword
On-site, ML-estimation, Bivariate ordered probit, Sample inclusion.
National Category
Social Sciences
Research subject
Statistics
Identifiers
urn:nbn:se:su:diva-87055 (URN)
Available from: 2013-01-25 Created: 2013-01-25 Last updated: 2013-01-31

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CiteExportLink to record
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Citation style
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