Int. J. Computational Economics and Econometrics, Vol. x, No. x, xxxx 1 Copyright © 200x Inderscience Enterprises Ltd. Input shadow prices and overall efficiency of vegetable farms in Uzbekistan Aziz A. Karimov International Livestock Research Institute, Regional Office for East and Southeast Asia, 17A Nguyen Khang Street, Trung Hoa ward, Cau Giay district, Hanoi, Vietnam E-mail: az.karimov@cgiar.org Abstract: This paper attempts to estimate overall inefficiency of the sample of vegetable farms in Uzbekistan. Using the duality between the directional input distance function and the cost function, the study reports allocative inefficiency scores in addition to technical inefficiency in the vegetable farming system. Model results suggest for substantial reduction of input costs while maintaining the current level of production technology. Findings imply for better organisation of farming, improving access to market information, and developing extension services. The derived shadow prices of land and labour in the existence of production inefficiency could be of great interest to policy makers and researchers. Insofar as market-based reforms could take place and better incentives are provided, inefficient farmers could learn from farming best practices and adopt innovative and cost-effective ways of farming. Keywords: vegetable production; directional input distance function; Uzbekistan; shadow prices; overall efficiency; computational economics. Reference to this paper should be made as follows: Karimov, A.A. (xxxx) ‘Input shadow prices and overall efficiency of vegetable farms in Uzbekistan’, Int. J. Computational Economics and Econometrics, Vol. x, No. x, pp.xxx–xxx. Biographical notes: Aziz A. Karimov is a Scientist at the International Livestock Research Institute based in Hanoi, Vietnam. Previously, he was a Research Fellow at the World Institute for Development Economics Research of the United Nations University (UNU-WIDER). Aziz has a PhD in Agricultural Economics from the Center for Development Research of the University of Bonn and MA in Economics from Northeastern University. His particular interests include applying productivity and efficiency methodologies to the fields of agricultural and resource economics as well as environmental economics. This paper is a revised and expanded version of a paper entitled ‘Economic inefficiency and shadow prices of inputs: The case of vegetable growing farms in Uzbekistan’ presented at International Conference on Applied Economics (ICOAE2013), Istanbul, 27–29 June, 2013.