Poldaru R and J Roots (2004). “Modeling Grain Yield in Estonian Counties: A Stochastic Frontier Analysis Approach.” in Emrouznejad A and V Podinovski (eds.) Proceedings of DEA2004, Birmingham, UK: 259.

Poldaru R and J Roots (2004). “Modeling Grain Yield in Estonian Counties: A Stochastic Frontier Analysis Approach.” in Emrouznejad A and V Podinovski (eds.) Proceedings of DEA2004, Birmingham, UK: 259.

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