As discussed in the text, in the absence of market imperfections and tax effects, we would expect the share price to decline by the amount of the dividend payment when the stock goes ex-dividend. Once we consider the role of taxes, however, this is not necessarily true. One model has been proposed that incorporates tax effects into determining the ex-dividend price: (P0 – PX) / D = (1 – tP) / (1 – tG) Here P0 is the price just before the stock goes ex, PX is the ex-dividend share price, D is the amount of the dividend per share, tP is the relevant marginal personal tax rate on dividends, and tG is the effective marginal tax rate on capital gains. a. If tP = tG = 0, how much will the share price fall when the stock goes ex? P0 PX D b. If tP = 25 percent and tG = 0, how much will the share price fall?