The tournament model and delayed payment model are to prove the existence of internal labor market, not only reasonable, but also effective.
内部晋升的竞赛模型和延期报酬模型向我们证明了内部劳动力市场的存在不仅是合理的，而且是有效率的。
Agriculture-stock raising production model is composed of capital, effective labor and land productivity, and the elastic coefficients descend in turn.
农牧业生产模型由资本、有效劳动和土地生产力构成，其弹性系数依次下降。
The utility model has the advantages of no service interruption, automated operation, good security, effective improving of production efficiency and decreasing of labor intensity.
本实用新型不用断电，自动化操作，安全性好，能有效提高生产效率，降低劳动强度。
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