How do managers of a firm choose between alternative finan cial policies? Can the choice of a particular financial policy affect the value of the firm? Since the early 1960s, the debate on these questions has been lively and interesting as economists have inves tigated the effect on the value of the firm of relaxing the various assumptions in the celebrated Modigliani-Miller theory. Further more, even if we stick to the MM-assumptions (that is, we assume perfect and complete capital markets, no taxes and symmetric information), and we therefore know that only optimally chosen investments...