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Tecnología agrícola internacional. Estudio comparativo con modelos panel no lineales

Author

Listed:
  • Cermeño, Rodolfo

    (Centro de Investigación y Docencia Económicas (CIDE))

  • Vázquez, Sirenia

    (Secretaría de Desarrollo Social, Gobierno de México)

Abstract

The most common approach used in international comparisons of agricultural productivity and technological change is generally based on Cobb-Douglas production functions. Similarly, the technological level is usually modeled as a linear deterministic trend. In this paper, we propose more general and less restrictive specifications. In particular, we consider a translog production function as well as a dynamic stochastic representation of the technological level, which produces a non-linear dynamic panel data model. The model is estimated for a sample of 104 countries and various subsamples, over the period 1961-1991. We find that the proposed model outperforms the alternative specifications considered and we use its results to characterize the agricultural technological processes and to make comparisons among groups of countries. A striking result is that the technological gap between developed and less developed countries has considerably increased over this period of time.// Uno de los enfoques más utilizados en comparaciones internacionales de la productividad y el cambio tecnológico agrícola emplea funciones de producción de tipo Cobb-Douglas. Igualmente, el nivel tecnológico es por lo común representado mediante tendencias temporales lineales. En este trabajo se propone utilizar especificaciones menos restrictivas. En particular, se propone utilizar una función de producción translogarítmica junto con una representación estocástica dinámica del nivel tecnológico, lo cual produce un modelo panel dinámico no lineal. El modelo es estimado para un grupo de 104 países y varios subgrupos durante el periodo 1961-1991. Se encuentra que el modelo propuesto es mejor que otras especificaciones consideradas y se utilizan sus resultados para caracterizar los procesos tecnológicos y hacer comparaciones entre grupos de países. Uno de los resultados más destacables del estudio es que la brecha tecnológica entre países desarrollados y en desarrollo ha aumentado de manera considerable durante ese periodo.

Suggested Citation

  • Cermeño, Rodolfo & Vázquez, Sirenia, 2006. "Tecnología agrícola internacional. Estudio comparativo con modelos panel no lineales," El Trimestre Económico, Fondo de Cultura Económica, vol. 0(291), pages 539-573, julio-sep.
  • Handle: RePEc:elt:journl:v:73:y:2006:i:291:p:539-573
    DOI: http://dx.doi.org/10.20430/ete.v73i291.331
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    File URL: http://www.eltrimestreeconomico.com.mx/index.php/te/article/view/331/377
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    Keywords

    Inter-country agricultural production function; Agricultural technology; Nonlinear dynamic panel models; Cobb-Douglas and Translog production functions; función de producción agrícola internacional; tecnología agrícola; modelos panel dinámicos no lineales; funciones de producción Cobb-Douglas y translogarítmicas;

    JEL classification:

    • C23 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Models with Panel Data; Spatio-temporal Models
    • Q16 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - R&D; Agricultural Technology; Biofuels; Agricultural Extension Services

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