By Armando Mendes, Emiliana L. D. G. Soares da Silva, Jorge M Azevedo Santos
The editors draw on a 3-year undertaking that analyzed a Portuguese zone intimately, evaluating this research with papers from different areas. purposes contain the estimation of technical potency in agricultural grazing platforms (dairy, pork and combined) and particularly for dairy farms. The conclusions point out that it really is now essential to support small dairy farms to be able to cause them to extra effective. those effects should be in comparison with the technical potency of a pattern of Spanish dairy processing organizations provided by means of Magdalena Kapelko and co-authors.
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2 Econometric Approach to Efficiency The econometric approach to efficiency results from the estimation of frontier models which deal with parametric representations of technology along with a onesided error term or a two-part error term (composed error), depending on how the functional form has been specified as being a deterministic or a stochastic frontier (Kalirajan and Shand 1999; Murillo-Zamoran and Vega-Cervera 2001). As the parametric approach to efficiency states an econometric specification, models may also be classified according to the function form, production, cost or profit, or functional form, which describes the relationship between inputs and outputs.
1990) developed and estimated a frontier model in whose specification they introduced the component of technical inefficiency varying over time. The functional form is based on a Cobb–Douglas technology of production where the independent term and some regression coefficients vary with the individuals and with time. This model generalizes the one by Schmidt and Sickles (1984), considering in the production function, a function of variable coefficients which is quadratic in t and contemplates the individual and time variation of technical efficiency which is identical for all productive units.
1995), Tsionas (2001, 2002) and Huang (2004). Nowadays, stochastic frontier approach to organizations efficiency measurement may play an important role in the field of economical sustainable development of societies, as it allows managements to reach high levels of performance restricting resources, minimizing undesired outputs or optimizing desired outputs. More research is needed in order to enlarge the knowledge in this issue. 2 Review of Frontier Models and Efficiency Analysis: A Parametric Approach 33 References Afriat SN (1972) Efficiency estimation of a production function.