Measuring and decomposing changes in agricultural productivity, nitrogen use efficiency and cumulative exergy efficiency: Application to OECD agriculture

Hoang, Viet-Ngu (2011) Measuring and decomposing changes in agricultural productivity, nitrogen use efficiency and cumulative exergy efficiency: Application to OECD agriculture. Ecological Modelling, 222 1: 164-175. doi:10.1016/j.ecolmodel.2010.09.032


Author Hoang, Viet-Ngu
Title Measuring and decomposing changes in agricultural productivity, nitrogen use efficiency and cumulative exergy efficiency: Application to OECD agriculture
Journal name Ecological Modelling   Check publisher's open access policy
ISSN 0304-3800
Publication date 2011-01-10
Year available 2010
Sub-type Article (original research)
DOI 10.1016/j.ecolmodel.2010.09.032
Volume 222
Issue 1
Start page 164
End page 175
Total pages 12
Editor B. D. Fath
Place of publication Netherlands
Publisher Elsevier BV
Collection year 2011
Language eng
Subject 149902 Ecological Economics
140205 Environment and Resource Economics
140201 Agricultural Economics
Abstract This paper uses an aggregate quantity space to decompose the temporal changes in nitrogen use efficiency and cumulative exergy use efficiency into changes of Moorsteen–Bjurek (MB) Total Factor Productivity (TFP) changes and changes in the aggregate nitrogen and cumulative exergy contents. Changes in productivity can be broken into technical change and changes in various efficiency measures such as technical efficiency, scale efficiency and residual mix efficiency. Changes in the aggregate nitrogen and cumulative exergy contents can be driven by changes in the quality of inputs and outputs and changes in the mixes of inputs and outputs. Also with cumulative exergy content analysis, changes in the efficiency in input production can increase or decrease the cumulative exergy transformity of agricultural production. The empirical study in 30 member countries of the Organisation for Economic Co-operation Development from 1990 to 2003 yielded some important findings. The production technology progressed but there were reductions in technical efficiency, scale efficiency and residual mix efficiency levels. This result suggests that the production frontier had shifted up but there existed lags in the responses of member countries to the technological change. Given TFP growth, improvements in nutrient use efficiency and cumulative exergy use efficiency were counteracted by reductions in the changes of the aggregate nitrogen contents ratio and aggregate cumulative exergy contents ratio. The empirical results also confirmed that different combinations of inputs and outputs as well as the quality of inputs and outputs could have more influence on the growth of nutrient and cumulative exergy use efficiency than factors that had driven productivity change.
Keyword Nutrient use efficiency
Cumulative exergy use efficiency
Thermodynamic efficiency change
Productivity growth
OECD agriculture
Sustainability
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Official 2011 Collection
 
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Created: Fri, 05 Nov 2010, 00:54:32 EST by Alys Hohnen on behalf of School of Economics