Measuring the Effect of Agricultural Extension on Technical Efficiency in Crop Farming: Meta-Regression Analysis

36 Pages Posted: 25 Jul 2018 Last revised: 10 Nov 2018

See all articles by Nicolas Lampach

Nicolas Lampach

KU Leuven - Centre for Legal Theory and Empirical Jurisprudence

Nguyen Van Phu

University of Angers - Bureau of Economic Theory and Application (BETA)

Nguyen To The

Vietnam National University of Agriculture

Date Written: July 4, 2018

Abstract

Agricultural extension services have been dominated by development programs to improve the productivity of crops and to increase farmers' income. The virtues and limitations of these programs ignite a debate among scholars from distinct strands of research. How effective are agricultural extension services in improving the productivity level of the agricultural output? We examine the key determinants driving systematic variations in the obtained technical efficiency estimates from all relevant crop farming studies. A weighted least square meta-regression analysis is conducted by using 193 observations from 96 farm level studies to evaluate the estimates of technical efficiency in crop farming and to review the relationship between agricultural extension services and farm performance. Evidence for the absence of a publication bias in the farm studies used in the meta-analysis is identified. The empirical results manifest that there is a positive and significant effect of extension services on technical efficiency estimates. Farm productivity is significantly influenced by country level characteristics, sample size of farm studies and type of crops. Our empirical findings are robust when replacing missing observations with imputed values from the multiple imputation method.

Keywords: Agricultural extension; Crop farming; Meta-analysis; Multiple Imputation; Publication bias; Technical efficiency; Weighted Least Square Estimation

JEL Classification: Q16, O18, C14, C29

Suggested Citation

Lampach, Nicolas and Phu, Nguyen Van and To The, Nguyen, Measuring the Effect of Agricultural Extension on Technical Efficiency in Crop Farming: Meta-Regression Analysis (July 4, 2018). Available at SSRN: https://ssrn.com/abstract=3208034 or http://dx.doi.org/10.2139/ssrn.3208034

Nicolas Lampach (Contact Author)

KU Leuven - Centre for Legal Theory and Empirical Jurisprudence ( email )

Tiensestraat 41
Leuven, B-3000
Belgium

Nguyen Van Phu

University of Angers - Bureau of Economic Theory and Application (BETA) ( email )

61 avenue of the Black Forest
F-67085 Strasbourg Cedex
France

Nguyen To The

Vietnam National University of Agriculture ( email )

Vietnam

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