GRUBER, Harald. Endogenous Sunk Costs in the Market for Mobile Telecommunications: The Role of Licence Fees. The Economic and Social Review, [S. l.], v. 33, n. 1, Spring, p. 55–64, 2026. Disponível em: https://esr.ie/index.php/esr/article/view/3697. Acesso em: 2 oct. 2026.