Measuring Technological Innovation over the Long Run
نویسندگان
چکیده
We use textual analysis of high-dimensional data from patent documents to create new indicators technological innovation. identify important patents based on similarity a given previous and subsequent work: these are distinct work but related innovations. Our importance correlate with existing measures quality also provide complementary information. breakthrough innovations as the most patents—those in right tail our measure—and construct time series indices change at aggregate sectoral levels. technology capture evolution waves over long span (1840 present) cover innovation by private public firms well nonprofit organizations US government. Advances electricity transportation drive index 1880s, chemicals 1920s 1930s, computers communication post-1980s. (JEL C43, N71, N72, O31, O33, O34)
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ژورنال
عنوان ژورنال: The American economic review
سال: 2021
ISSN: ['2640-205X', '2640-2068']
DOI: https://doi.org/10.1257/aeri.20190499