Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    We will mail you new results for this query: keywords==technical efficiency
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A measure for the efficiency of water use and its determinants, a case study of small-scale irrigation schemes in North-West Province, South Africa
Speelman, S. ; Haese, M.F.C. D'; Buysse, J. ; Haese, L. D' - \ 2008
Agricultural Systems 98 (2008)1. - ISSN 0308-521X - p. 31 - 39.
data envelopment analysis - technical efficiency - productive efficiency - benchmarking - farms - spain - agriculture - bangladesh - pakistan - industry
This paper analyses the efficiency with which water is used in small-scale irrigation schemes in North-West Province in South Africa and studies its determinants. In the study area, small-scale irrigation schemes play an important role in rural development, but the increasing pressure on water resources and the approaching introduction of water charges raise the concern for more efficient water use. With the data envelopment analysis (DEA) techniques used to compute farm-level technical efficiency measures and sub-vector efficiencies for water use, it was shown that under constant returns to scale (CRS) and variable returns to scale (VRS) specification, substantial technical inefficiencies, of 49% and 16%, respectively, exist among farmers. The sub-vector efficiencies for water proved to be even lower, indicating that if farmers became more efficient using the technology currently available, it would be possible to reallocate a fraction of the irrigation water to other water demands without threatening the role of small-scale irrigation. In a second step, Tobit regression techniques were used to examine the relationship between sub-vector efficiency for water and various farm or farmer characteristics. Farm size, landownership, fragmentation, the type of irrigation scheme, crop choice and the irrigation methods applied showed a significant impact on the sub-vector efficiency for water. Such information is valuable for extension services and policy makers since it can help to guide policies towards increased efficiency.
The dynamics of efficiency and productivity growth in U.S. electric utilities
Rungsuriyawiboon, S. ; Stefanou, S.E. - \ 2008
Journal of Productivity Analysis 30 (2008)3. - ISSN 0895-562X - p. 177 - 190.
united-states agriculture - technical efficiency - duality
This study recognizes explicitly the efficiency gain or loss as a source in explaining the growth. A theoretically consistent method to estimate the decomposition of dynamic total factor productivity growth (TFP) in the presence of inefficiency is developed which is constructed from an extension of the dynamic TFP growth, adjusted for deviations from the long-run equilibrium within an adjustment-cost framework. The empirical case study is to U.S. electric utilities, which provides a measure to evaluate how different electric utilities participate in the deregulation of electricity generation. TFP grew by 2.26% per annum with growth attributed to the combined scale effects of 0.34%, the combined efficiency effects of 0.69%, and the technical change effect of 1.22%. The dynamic TFP grew by 1.66% per annum for electric utilities located within states with the deregulation plan and 3.30% per annum for those located outside. Electric utilities located within states with the deregulation plan increased the outputs by improving technical and input allocative efficiencies more than those located outside of states with deregulation plans.
Crop and soil specific N and P efficiency and productivity in Finland
Bäckman, S. ; Oude Lansink, A.G.J.M. - \ 2005
Agricultural and Food Science 14 (2005)3. - ISSN 1459-6067 - p. 264 - 276.
long-term p - technical efficiency - phosphorus status - diverse soils - farms
This paper estimates a stochastic production frontier based on experimental data of cereals production in Finland over the period 1977-1994. The estimates of the production frontier are used to analyze nitrogen and phosphorous productivity and efficiency differences between soils and crops. For this input specific efficiencies are calculated. The results can be used to recognize relations between fertilizer management and soil types as well as to learn where certain soil types and crop combinations require special attention to fertilization strategy. The combination of inputs as designed by the experiment shows significant inefficiencies for both N and P. The measures of mineral productivity and efficiency indicate that clay is the most mineral efficient and productive soil while silt and organic soils are the least efficient and productive soils. Furthermore, a positive correlation is found between mineral productivity and efficiency. The results indicate that substantial technical efficiency differences between different experiments prevail.
Assessment of the quality of farmers environmental management and its effects on resource use efficiency: A Dutch case study
Koeijer, T.J. de; Wossink, G.A.A. ; Smit, A.B. ; Janssens, S.R.M. ; Renkema, J.A. ; Struik, P.C. - \ 2003
Agricultural Systems 78 (2003). - ISSN 0308-521X - p. 85 - 103.
technical efficiency
Most research on efficiency of farm management focuses on the relationship between an array of individual management variables and technical performance. Few studies have analysed the relationship between the total complex of farm management and technical farm performance. The present study uses the concept of strategic management and applies it to nitrogen management on Dutch arable farms. Data Envelopment Analysis (DEA) was used to assess farm specific efficiency scores for fertiliser use. For a sub-sample of the farms used in the DEA analysis, the strategic management concept was addressed by means of a workshop. The management elements (objectives, internal analysis of weaknesses and strengths, external analysis of opportunities and threats, and synthesis) were made operational by relating them to the introduction of the Mineral Accounting System (MINAS) by 2001 for Dutch arable farms. The external analysis was evaluated by questions about the MINAS rules; the internal analysis was evaluated by questions on the expected consequences for the farmer's N management. An interactive simulation model evaluating whether farmers were able to choose the optimal fertilisation strategy in view of MINAS assessed the 'quality of the synthesis'. A positive significant correlation was found between the 'quality of the synthesis' and N efficiency. (C) 2003 Elsevier Ltd. All rights reserved.
Analysis of Environmental Efficiency Variation
Reinhard, A.J. ; Knox Lovell, C.A. ; Thijssen, G.J. - \ 2002
American Journal of Agricultural Economics 84 (2002)4. - ISSN 0002-9092 - p. 1054 - 1065.
frontier production function - dutch dairy farms - technical efficiency - panel-data
In this article, we develop and implement a methodology for analyzing the sources of variation in environmental efficiency across producers. We formulate a two-stage model. In the first stage, we use stochastic frontier analysis to estimate both technical and environmental efficiency. In the second stage, we again use stochastic frontier analysis to regress estimated environmental efficiency scores against a variety of technology, physical environment, and management variables. In this stage we estimate the impact of each explanatory variable on environmental efficiency, and we derive conditional estimates of environmental efficiency from the one-sided error component. We illustrate our methodology with an empirical application to a panel of Dutch dairy farms. We find evidence of relatively low levels of environmental efficiency, and we find that environmental efficiency can be improved through a number of policy options, including the provision of farmers with more insight into the nutrient balance of their farms.
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