Proceedings and Presentations

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Browsing Proceedings and Presentations by Author "Thibbotuwawa, Manoj"

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    A comparative analysis of productive efficiency and technology gap in irrigated and rain-fed rice farming systems in Sri lanka: non parametric approach
    (2013) Thibbotuwawa, Manoj; Mugera, Amin; White, Ben
    The paper analyses the differences of technical, allocative, cost and scale efficiencies of irrigated and rain-fed rice farmers in Sri Lanka in two different perspectives; first, relative to a common metafrontier, defined as the boundary of an unrestricted technology set and second relative to group frontiers defined to be the boundaries of restricted technology sets in each group. Data envelopment analysis (DEA) metafrontier and group frontier approaches are used for cross section survey data of 90 farms. Rain-fed farms perform comparably with the irrigated farms based on the group frontier results. Rain-fed farmers may be operating as technically efficient as they could, given the existing production technology. However rain-fed farms move significantly towards inefficiency compared to the irrigated farms under the metafrontier technology. Results indicate that the irrigation shifts the rice sector production frontier to a higher level. In addition, a second stage bootstrapped truncated regression shows that efficiency differences between two regions are explained by the timely availability of the water to a significant extent. We suggest that future sectoral policies should be designed to address the efficiency enhancing factors such as irrigation, quality seed, land ownership and scale and female labour participation
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    A non-parametric analysis of rice production efficiency in Sri Lanka
    (Australian Agricultural & Resource Economic Society, 2012) Thibbotuwawa, Manoj; Mugera, Amin; White, Ben
    This article investigates the production efficiency of rice farming in Sri Lanka using cross section survey data of 90 farms. Past studies on rice farming have mostly focused on technical efficiency (TE). Here, we examine technical efficiency, allocative efficiency (AE) and cost efficiency (CE) using the data envelopment analysis (DEA) approach. On average, the farms were 87% technically efficient; irrigated farms were more efficient (88%) than rain-fed farms (82%). Average cost, allocative and scale efficiencies were 73%, 84% and 87%. Bias corrected TE estimate suggests an expected output expansion of 25% with a given input combination in order to become fully efficient as opposed to 16% based on the original estimates. In addition, a second stage Tobit regression shows that efficiency is influenced by farm size, water security, ownership, seed quality, family labour endowment and female labour participation