Essays on information and financial frictions in macroeconomics

This dissertation examines how information and financial frictions impact firms' investment decisions and shape the effectiveness of monetary policy. The first chapter studies the response of high and low credit quality firms to expansionary monetary shocks. According to the findings, high credit quality firms respond to an expansionary shock by increasing their investment, inventory, and sales, whereas low credit quality firms experience a decrease in these variables. Moreover, their financing behavior differs, with high credit quality firms raising funds through equity while low credit quality firms are unable to issue equity or debt. To provide a theoretical explanation for these findings, a simple model is constructed with two types of firms: financially constrained firms and unconstrained firms. Financially constrained firms face a trade-off in allocating their limited funds between wage payments and investment, while unconstrained firms have greater financial flexibility. As a result of an expansionary shock, an increase in wages affects constrained firms disproportionately, leading them to cut their investment to cover the additional labor costs. Furthermore, constrained firms, due to their limited collateral, have to reduce their debt, which aligns with the empirical observations. The second chapter examines the interaction between information and financial frictions and its implications for the investment channel of monetary policy. In a model with inattentive firms facing financial frictions, constrained firms are more attentive to monetary policy as they attempt to avoid financial costs, creating a new channel for financial frictions to affect price rigidity. Since the level of price rigidity is one of the determinants of the outcome of the monetary policy, the model suggests that the investment channel of monetary policy hinges on the interaction between financial frictions and rational inattention. The research provides empirical evidence that supports the predictions of the model. Firstly, the study uses firms' expectation surveys and, taking size as a proxy for financial constraint, finds that smaller firms have more precise nowcasts and forecasts of aggregate variables. Additionally, these firms are more willing to pay for professional forecasts. Secondly, the research employs firms' balance sheet data and a proxy for aggregate attentiveness to demonstrate that higher information rigidity leads to a sluggish and dampened aggregate investment response to monetary shocks, as predicted by the model. The third chapter finds that a contractionary monetary shock would increase the number of defaults and the aggregate liability of defaulted firms in the economy. Using a DSGE model with financial intermediaries, I show that a higher rate of default negatively impacts the balance sheets of banks and leads to a decrease in the supply of credit and a rise in the interest rate of loans. This further increases the cost of production, forcing more firms to file for bankruptcy. The study demonstrates that monetary policy can effectively dampen this amplification mechanism by considering the default rate in the policy rule, thereby ensuring a more stable economic environment.Economic