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. 2022 Aug 5;32(5):1419–1435. doi: 10.1007/s00191-022-00781-8

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© The Author(s) 2022, corrected publication 2022

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Fig. 8 — The ratio of primary workers (solid curve) and secondary workers (dashed curve) to the total number of workers. Secondary workers include: part-time workers, dispatched workers from labor agency, contract/entrusted employees, and generic ”other” category (Statistics Bureau of 2021)