This paper provides a competitive equilibrium model of capital structure and industry dynamics. In the model, firms make financing, investment, entry, and exit decisions subject to idiosyncratic technology shocks. The capital structure choice ref lects the tradeoff between the tax benefits of debt and the associated bankruptcy and agency costs. The interaction between financing and production decisions inf luences the stationary distribution of firms and their survival probabilities. The analysis demonstrates that the equilibrium output price has an important feedback effect. This effect has a number of testable implications. For example, high growth industries have relatively lower leverage and turnover rates.THE INTERACTION BETWEEN CAPITAL STRUCTURE and product market decisions has recently received considerable attention in both economics and finance. Beginning with Brander and Lewis (1986, 1988) and Maksimovic (1988), a growing number of theoretical papers investigate this interaction. In addition, many empirical studies (Chevalier (1995a(Chevalier ( , 1995b, Phillips (1995), Kovenock and Phillips (1997), Maksimovic and Phillips (1998), Zingales (1998), Lang, Ofek, andStulz (1996), Mackay and Phillips (2004)) examine the relation between capital structure and firm entry, exit, investment and output decisions.1 These studies generally document the following:(1) Industry output is negatively associated with the average industry debt ratio. (2) Plant closings are positively associated with debt and negatively associated with plant-level productivity. (3) Firm entry is positively associated with debt of incumbents. (4) Firm investment is negatively associated with debt. (5) There is substantial inter-and intra-industry variation in leverage.