Journal of Forest Economics > Vol 19 > Issue 3

A DEA approach to assess the efficiency of radiata pine logs to produce New Zealand structural grades

Rosa M. Alzamora, , ralzamor@uach.cl Luis A. Apiolaza, , Luis.Apiolaza@canterbury.ac.nz
 
Suggested Citation
Rosa M. Alzamora and Luis A. Apiolaza (2013), "A DEA approach to assess the efficiency of radiata pine logs to produce New Zealand structural grades", Journal of Forest Economics: Vol. 19: No. 3, pp 221-233. http://dx.doi.org/10.1016/j.jfe.2013.01.003

Published: 0/8/2013
© 0 2013 Rosa M. Alzamora, Luis A. Apiolaza
 
Subjects
 
Keywords
JEL Codes:C1D11
Log efficiencyDEAPinus radiataEconomic weightsStructural lumberBreeding objectives
 

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In this article:
Introduction
Materials and methods
Results and discussion
Conclusions

Abstract

An efficiency analysis revealed the relative magnitude of wood traits that distinguishes efficient radiata pine logs to produce New Zealand structural grades. Technical and cost efficiencies were obtained by using data envelopment analysis (DEA). Wood trait prices used to perform the cost efficiency corresponded to economic weights derived from a partial regression. These values were 1.1, 29.7, 0.3 and −0.4NZ$/m3 for small end diameter (cm), stiffness (GPa), basic density (kg/m3) and largest branch (mm) respectively. The most efficient logs were those with the highest difference between recovery value and price. There were positive and significant correlations between technical efficiency and wood stiffness (0.46, p<0.05) and between cost efficiency and log recovery value (0.85, p<0.05). The most efficient logs had a ratio of 1:4 between stiffness and small end diameter whereas logs that did not generate structural lumber presented ratios close to 1:8. This information will inform the development of breeding objectives, and help segregating and pricing logs by using traits patterns that result in efficient logs for the production of structural wood.

DOI:10.1016/j.jfe.2013.01.003