The effect of social media information on college major choices in China: a difference-in-differences analysis.

Although it exhibits a weakly significant positive deviation in 2023 (0.066, p = 0.032), potentially reflecting a broader, mild downward shift in applicant preferences for humanities in that year, its average treatment effect remains statistically insignificant.

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For the full sample, the coefficient on the interaction term is 0.123 and is highly significant ( \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$p<0.001$$\end{document} ), as shown in Column 3 of Table 3 .

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The 2019 coefficient is \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$-0.038$$\end{document} ( p = 0.017), which is marginally significant.

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