这是因为一个经济体的趋势增长率不能直接被测算。
That is because an economy's trend growth rate cannot be measured directly.
测算结果表明，广西农业经济增长主要依靠物质费用投入的增加和科技进步，劳动力和耕地对农业总产值增长的贡献很小。
The result indicates that the agricultural growth mainly relies on material expenses investment and scientific progress, the contribution of labor force and arable land is quite limited.
我们基于三类经济数据，建立了测算人力资本对经济增长贡献率的模型。
A model about valuing the contribution rate of economy growth was built, based on three kinds of datum.
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