Patent Citations and the Size of the Inventive Step - Evidence from Hybrid Corn
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Patents are the main source of data on innovation, but there are persistent concerns that patents may be a noisy and biased measure. An important challenge arises from unobservable variation in the size of the inventive step that is covered by a patent. The count of later patents that cite a patent
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美国国家经济研究局创建时间：
2015-08-01
