Monetary policy, exchange rates and stock prices in the Middle East region

A structural vector autoregressive model is employed to investigate the impact of monetary policy and real exchange rate shocks on the stock market performance of Kuwait, Oman, Saudi Arabia, Egypt and Jordan. In order to identify the structural shocks both short run and long run restrictions are applied. Unlike previous literature the contemporaneous interdependence between the financial variables are left unrestricted to give a more accurate depiction of the relationships. The heterogeneity of the results reflect the different monetary policy frameworks and stock market characteristics of these countries. Mainly, monetary policy and the real exchange rate shocks have a significant short run impact on the stock prices of the countries that apply a relatively more independent monetary policy and flexible exchange rates

Countercyclical capital requirement reductions, state dependence and macroeconomic outcomes

We use bank-, loan- and firm-level data together with a quasi-natural experiment to estimate the impact of capital requirement reductions on bank lending and real economic outcomes. We find that capital requirement reductions increase lending both to households and firms at the bank- and loan-level, and that the increased lending to firms translates into higher capital investment at the firm-level. Furthermore, the transmission of lower capital requirements to the real economy has a "double state-dependence". The first state-dependence relates to the characteristics of banks. Specifically, the transmission of lower capital requirements to lending is stronger for banks with lower capital ratios. We interpret this result as capital requirement reductions having a larger effect when they are more binding. The second state-dependence relates to the characteristics of the corporate sector. Specifically, the transmission of lower capital requirements to real economic outcomes - via bank lending - is weaker for firms with higher default risk or more leverage, suggesting that capital requirement reductions is most effective in terms of boosting real economic outcomes when firms are financially sound.publishedVersio

Countercyclical capital requirement reductions, state dependence and macroeconomic outcomes

We use bank-, loan- and firm-level data together with a quasi-natural experiment to estimate the impact of capital requirement reductions on bank lending and real economic outcomes. We find that capital requirement reductions increase lending both to households and firms at the bank- and loan-level, and that the increased lending to firms translates into higher capital investment at the firm-level. Furthermore, the transmission of lower capital requirements to the real economy has a "double state-dependence". The first state-dependence relates to the characteristics of banks. Specifically, the transmission of lower capital requirements to lending is stronger for banks with lower capital ratios. We interpret this result as capital requirement reductions having a larger effect when they are more binding. The second state-dependence relates to the characteristics of the corporate sector. Specifically, the transmission of lower capital requirements to real economic outcomes - via bank lending - is weaker for firms with higher default risk or more leverage, suggesting that capital requirement reductions is most effective in terms of boosting real economic outcomes when firms are financially sound

Manipulation through Biased Product Reviews

We study a signal-jamming model of product review manipulation in which rational consumers consult product reviews and price to better estimate a product’s quality, and a firm, whose quality is either high or low, chooses its price and how much bias to insert into product reviews. We show that both firm types always exert positive effort to manipulate product reviews, and, depending on the equilibrium price level, one or both of them can increase its sales. When the high-type firm exerts more effort than the low-type, review manipulation benefits consumers by raising [lowering] their demand for the high-quality [low-quality] product

Endovascular treatment of an aortobronchial fistula

A 67-year-old man operated on 8 years previously for type B aortic dissection presented with two episodes of massive hemoptysis. An aortobronchial fistula was suspected with spiral computed tomography angiography, and showed a small pseudoaneurysm corresponding to the distal anastomotic site. The patient underwent endovascular stent-graft implantation and is asymptomatic 8 months after the procedure