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The paper uses two hand collected datasets to implement a novel research design for analyzing the precursors to patent quality. Operationalizing patent "quality" as legal validity, the paper analyzes the relation between Federal Circuit decisions on patent validity and three sets of data about the patents: quantitative features of the patents themselves, textual analysis of the patent documents, and data collected from the prosecution histories of the patents. The paper finds large anddoi:10.2139/ssrn.1671784 fatcat:zltu5kkz5fgt5ooanssh4f4zvy