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We derive the optimal dynamic contract in a continuous-time principal-agent setting, and implement it with a capital structure (credit line, long-term debt, and equity) over which the agent controls the payout policy. While the project's volatility and liquidation cost have little impact on the firm's total debt capacity, they increase the use of credit(More)
We study the dynamics of risk premia during crises where …nancial intermediaries faces constraints on raising equity capital. Risk premia rise when intermediaries' equity capital is scarce. We calibrate the model to match two aspects of crises: the nonlinearity of risk premia during crisis episodes, and the speed of adjustment in risk premia from a crisis(More)
This article analyzes the dynamic coordination problem among creditors of a firm with a time-varying fundamental and a staggered debt structure. In deciding whether to roll over his debt, each maturing creditor is concerned about the rollover decisions of other creditors whose debt matures during his next contract period. We derive a unique threshold(More)
Oil in subsurface reservoirs is biodegraded by resident microbial communities. Water-mediated, anaerobic conversion of hydrocarbons to methane and CO2, catalyzed by syntrophic bacteria and methanogenic archaea, is thought to be one of the dominant processes. We compared 160 microbial community compositions in ten hydrocarbon resource environments (HREs) and(More)
We study a continuous-time principal-agent model in which a risk-neutral agent with limited liability must exert unobservable effort to reduce the likelihood of large but relatively infrequent losses. Firm size can be decreased at no cost, and increased subject to adjustment costs. In the optimal contract, investment takes place only if a long enough period(More)
We develop an analytically tractable model integrating dynamic investment theory with dynamic optimal incentive contracting, thereby endogenizing financing constraints. Incentive contracting generates a history-dependent wedge between marginal and average q, and both vary over time as good (bad) performance relaxes (tightens) financing constraints.(More)
Financing can be cheaper in certain periods than others. For example, in crisis periods, firms face tougher financing terms than in normal times. We develop an analytically tractable dynamic framework for firms facing stochastic financing opportunities. Financially constrained firms choose intertemporal equity issuance, internal cash accumulation, corporate(More)
This paper studies the liquidity of defaultable corporate bonds that are traded in an over-the-counter secondary market with search frictions. Bargaining with dealers determines a bond's endogenous liquidity, which depends on both the firm fundamental and the time-to-maturity of the bond. Corporate default and investment decisions interact with the(More)
This paper finds that concurrent with the rapid growing index investment in commodities markets since early 2000s, futures prices of non-energy commodities in the US became increasingly correlated with oil and this trend was significantly more pronounced for commodities in the two popular SP-GSCI and DJ-UBS commodity indices. This finding reflects a(More)