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More employer activities in school, lower odds of being out of work later
In a UK study of 1,744 young adults, those who recalled more employer activities organized by their school or college were less likely to be out of work, education or training at 19–24, after adjusting for background.

Sources
From the articleWhat the Research Says About Employers in SchoolsWhat studies from the OECD and Education and Employers found about students who meet employers during school, and where the evidence is thin.