IS THE FRIDAY EFFECT A FIRM EFFECT? THE CASE OF CASH-FINANCED ACQUISITION ANNOUNCEMENTS OF UNLISTED FIRMS. EVIDENCE FROM SPAIN. UCJC Business and Society Review (formerly known as Universia Business Review), [S. l.], v. 20, n. 77, 2023. DOI: 10.3232/UBR.2023.V20.N2.02. Disponível em: https://journals.ucjc.edu/ubr/article/view/4525. Acesso em: 12 oct. 2026.