The dissertation consists of three papers in Financial Economics. The first paper revisits the link between interest rates and corporate bond credit spreads by applying Rigobon’s (2003) heteroskedasticity identification methodology. This novel approach allows us to account for endogeneity problems and to conclude that credit spreads respond negatively to interest rates, a result consistent with the implications of Merton’s (1974) structural model. The negative relation is robust to macroeconomic shocks, interest rates characteristics, different volatility regimes, and bond ratings. To explain the negative relation, we rule out the plausibility of callability and business cycle as origins of the negative relationship. The second paper invest...