You are here: Home
/ Publication Information
Title: Partitioning error components for accuracy-assessment of near-neighbor methods of imputation
Author: Stage, Albert R.; Crookston, Nicholas L.
Source: Forest Science. 53(1): 62-72.
Publication Series: Scientific Journal (JRNL)
Description: Imputation is applied for two quite different purposes: to supply missing data to complete a data set for subsequent modeling analyses or to estimate subpopulation totals. Error properties of the imputed values have different effects in these two contexts. We partition errors of imputation derived from similar observation units as arising from three sources: observation error, the distribution of observation units with respect to their similarity, and pure error given a particular choice of variables known for all observation units. Two new statistics based on this partitioning measure the accuracy of the imputations, facilitating comparison of imputation to alternative methods of estimation such as regression and comparison of alternative methods of imputation generally. Knowing the relative magnitude of the errors arising from these partitions can also guide efficient investment in obtaining additional data. We illustrate this partitioning using three extensive data sets from western North America. Application of this partitioning to compare near-neighbor imputation is illustrated for Mahalanobis- and two canonical correlation-based measures of similarity.
Keywords: most similar neighbor, k-nn inference, missing data, landscape modeling
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
XML: View XML
Stage, Albert R.; Crookston, Nicholas L. 2007. Partitioning error components for accuracy-assessment of near-neighbor methods of imputation. Forest Science. 53(1): 62-72.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility