African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6621

Full Length Research Paper

Total factor productivity growth and convergence in Northern Thai agriculture

Sanzidur  Rahman1*, Aree Wiboonpongse2, Songsak Sriboonchitta3 and Kritsada Kanmanee4
  1School of Geography, Earth and Environmental Sciences, University of Plymouth, Plymouth, PL4 8AA, United Kingdom. 2Department of Agricultural Economics, Faculty of Agriculture, Chiang Mai University, Chiang Mai, Thailand 50200. 3Faculty of Economics, Chiang Mai University, Chiang Mai, 50200, Thailand. 4Institute of Self-sufficiency in Research and Promotion, Chiang Mai University, Chiang Mai, 50200, Thailand.
Email: [email protected]

  •  Accepted: 28 March 2012
  •  Published: 05 May 2012



The paper estimates Total Factor Productivity (TFP) growth in six agro-economic zones of Northern Thailand covering a 23 year period (1977 to 1999) and tests convergence amongst regions using a stochastic production frontier approach. Results revealed that all the inputs excluding fertilizer significantly contribute to agricultural productivity. Increasing returns to scale prevail in these regions. Land, labor, irrigation and loan capital have substitution relationships but all are within the inelastic range. The mean technical efficiency level is low (0.88). The overall TFP declined slightly due to technical regress and modest improvement in technical efficiency change over time. However, convergence in productivity has been reached in all regions towards the end. The government’s initiative to support investment through Bank of Agriculture and Agricultural Cooperative loan had a significant influence on technical efficiency improvements. Policy implications include provision of capital through loan, investments in irrigation, and proper functioning of land and labor markets to improve agricultural productivity.


Key words:  Thailand, stochastic production frontiers, total factor productivity growth, convergence, technical efficiency change, technical change, agro-economic zone.