[We study the interaction between financing and investment decisions in a dynamic model, where the firm has multiple debt issues and equityholders choose the timing of investment. Jointly optimal capital and priority structures can virtually eliminate investment distortions because debt priority serves as a dynamically optimal contract. Examining the relative efficiency of priority rules observed in practice, we develop several predictions about how firms adjust their priority structure in response to changes in leverage, credit conditions, and firm fundamentals. Notably, financially unconstrained firms with few growth opportunities prefer senior debt, while financially constrained firms, with or without growth opportunities, prefer junior debt. Moreover, lower-rated firms are predicted to spread priority across debt classes. Finally, our analysis has a number of important implications for empirical capital structure research, including the relations between market leverage, book leverage, and credit spreads and Tobin's Q, the influence of firm fundamentals on the agency cost of debt, and the conservative debt policy puzzle.]

We study the effect of asset tangibility on corporate financing and investment decisions. Financially constrained firms benefit the most from investing in tangible assets because those assets help relax constraints, allowing for further investment. Using a dynamic model, we characterize this effect — which we call firm-level credit multiplier — and show how asset tangibility increases the sensitivity of investment to Tobin’s Q for financially constrained firms. Examining a large sample of manufacturers over the 1971–2005 period as well as simulated data, we find support for our theory’s tangibility–investment channel. We further verify that our findings are driven by firms’ debt issuance activities. Consistent with our empirical identification strategy, the firm-level credit multiplier is absent from samples of financially unconstrained firms and samples of financially constrained firms with low spare debt capacity.

We study the interaction between financing and investment decisions in a dynamic model, where the firm has multiple debt issues and equityholders choose the timing of investment. Jointly optimal capital and priority structures can virtually eliminate investment distortions because debt priority serves as a dynamically optimal contract. Examining the relative efficiency of priority rules observed in practice, we develop several predictions about how firms adjust their priority structure in response to changes in leverage, credit conditions, and firm fundamentals. Notably, financially unconstrained firms with few growth opportunities prefer senior debt, while financially constrained firms, with or without growth opportunities, prefer junior debt. Moreover, lower-rated firms are predicted to spread priority across debt classes. Finally, our analysis has a number of important implications for empirical capital structure research, including the relations between market leverage, book leverage, and credit spreads and Tobin's Q, the influence of firm fundamentals on the agency cost of debt, and the conservative debt policy puzzle.