where t 00 ¼ t=½1 þ rð1 2 t=ð1 þ rð1 2 t=ð1 þ rÞÞÞÞ. Effective tax rates are explored in Schreiber et al. (2002).
If a corporation faces an investment opportunity which requires an investment now of C0 and pays off a riskless X later (which is then taxable to the corporation at an effective rate tc), then if C0 is already held the corporation’s alternatives include: