A General Equilibrium Theory of Capital Structure

Douglas Gale () and Piero Gottardi

No 264, 2018 Meeting Papers from Society for Economic Dynamics

Abstract: We develop a general equilibrium theory of the capital structures of banks and firms. The liquidity services of bank deposits make deposits a "cheaper" source of funding than equity. Banks pass on part of this funding advantage in the form of lower interest rates to firms that borrow from them. Firms and banks choose their capital structures to balance the benefits of debt financing against the risk of costly default. An increase in the equity of a firm makes its debt less risky and that in turn reduces the risk of the banks who lend to the firm. Hence there is some substitutability between firm and bank equity. We find that firms have a comparative advantage in providing a buffer against systemic shocks, whereas banks have a comparative advantage in providing a buffer against idiosyncratic shocks.

Date: 2018
New Economics Papers: this item is included in nep-ban and nep-dge
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