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2. No holds barred: The intensification of employer opposition to organizing;Bronfenbrenner;Econ. Policy Inst.,2009
3. Measuring security price performance;Brown;J. Financ. Econ.,1980
4. Chen, K., 2015. URL http://kaichen.work/?p=418.
5. At 65%, approval of labor unions in U.S. remains high;Gallup,2020