The results in this paper raise a number of interesting issues that can be ad-dressed in future work. First, as we just mentioned, the reason why stock prices play such an important role in the issuance choice is still not particularly well understood. In addition, we have not provided a good explanation for why the deviation between a firm's current and target debt ratio seems to play a more important role in the repurchase choice than in the issuance choice. One possibility, mentioned anecdotally by investment bankers, is that since firms have more discretion when repurchasing capital than in issuing capital, capital structure conditions play a larger role in the repurchase decision while market conditions play a more important role in the issuance choice.