民勤县苜蓿生产效率的DEA-Tobit模型分析
DEA-Tobit analysis of alfalfa productive efficiency in Minqin, Gansu
Wang Li-jia
民勤县苜蓿生产效率的DEA-Tobit模型分析 |
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王丽佳 |
DEA-Tobit analysis of alfalfa productive efficiency in Minqin, Gansu |
|
Wang Li-jia
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| 规模效率变动情况 |
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