“…Some of them suggest that the announcement transmits good news (Horsky and Swyngedouw, 1987;Wan Kot and Zhang, 2007) especially when the change has a solid motivation (Bosch and Hirschey, 1989;Karbhari et al, 2004), and support, thus, 'The shareholder value maximisation hypothesis' (Woolridge and Snow, 1990). Other authors show that the announcement has no impact on stock prices (Howe, 1982;Karpoff and Rankine, 1994) or a negative effect ( Josev et al, 2004;Kadapakkam and Misra, 2007).…”