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- W4206375730 abstract "Abstract Some scholars build models to classify documents into chosen categories. Others, especially social scientists who tend to focus on population characteristics, instead usually estimate the proportion of documents in each category—using either parametric “classify-and-count” methods or “direct” nonparametric estimation of proportions without individual classification. Unfortunately, classify-and-count methods can be highly model-dependent or generate more bias in the proportions even as the percent of documents correctly classified increases. Direct estimation avoids these problems, but can suffer when the meaning of language changes between training and test sets or is too similar across categories. We develop an improved direct estimation approach without these issues by including and optimizing continuous text features, along with a form of matching adapted from the causal inference literature. Our approach substantially improves performance in a diverse collection of 73 datasets. We also offer easy-to-use software that implements all ideas discussed herein." @default.
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- W4206375730 date "2022-01-07" @default.
- W4206375730 modified "2023-09-26" @default.
- W4206375730 title "An Improved Method of Automated Nonparametric Content Analysis for Social Science" @default.
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- W4206375730 doi "https://doi.org/10.1017/pan.2021.36" @default.
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