In the period surrounding World War I, US firms sharply increased investment in fixed assets and working capital to accommodate large increases in demand associated with the war. Concurrently, the US adopted an excess profits tax, which created a tax bias in favor of equity financing. Despite this tax bias, firms in need of external funds largely issued debt, not equity, to finance investment spikes when the excess profits tax was in effect. Further, we find these firms systematically reduced debt after the war, whereas other firms did not. The results support models that link the dynamics of firms’ financing decisions with the dynamics of their investment opportunities and are inconsistent with models that emphasize taxes as a primary determinant of financing decisions.

Accelerated share repurchases (ASRs) are credible commitments by firms to repurchase shares immediately. Including an ASR in a repurchase program reduces the flexibility that firms have to alter an announced program in response to subsequent changes in the price and liquidity of its shares, unexpected shocks to cash flow and/or investment, etc. Thus, we investigate whether firms' decisions to include ASRs in their repurchase programs are associated with factors expected to influence the costs of lost flexibility and the benefits of enhanced credibility and immediacy. We find robust evidence consistent with the costs of lost flexibility and the benefits of credibility and immediacy being important determinants of ASR adoption. Additionally, we find that ASR announcements are associated with positive average abnormal stock returns.