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The productivity attenuation method is adopted to calculate land potential productivity of counties of Yan’an City and calculate population carrying capacity at current productivity level. Rsults shows that high photosynthetic potential productivity area and high light and temperature...
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In order to evaluate the performance of China's agricultural listed companies, we analyze the overall efficiency, pure … technical efficiency and scale efficiency of China's agricultural listed companies on the basis of input-output data concerning …-output redundancy situation using the slack variable derived from the model. The results show that the overall efficiency of China …
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them switch to better-paying jobs in the formal sector. But evidence of this is limited. China constitutes an important …
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"The NBER Bulletin on Aging and Health provides summaries of publications like this. You can sign up to receive the NBER Bulletin on Aging and Health by email. We ask how patient knowledge of appropriate antibiotic usage affects both physicians prescribing behavior and the physician-patient...
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