The Irish macroeconomic response to an external shock with an application to stress testing

The Irish economy has recently endured a period of turbulence as a result of the collapse of the domestic property market bubble and the onset of the global financial crisis. There are two critical vulnerabilities in the Irish economy at present. The first is the potential for sluggish economic growth due to a slowdown in external demand, which impacts on the government's ability to meet budgetary targets. The second concern relates to the financial stability of the banking system given the escalating mortgage crisis. Our results show that Irish economic growth is highly sensitive to the performance of its trading partners and any international slowdown will hinder Ireland's growth prospects. The model used suggests that the appropriate policy response is to pursue further gains in competitiveness. We estimate the impact of an external slowdown on mortgage delinquency using a new dataset on the loan books of the commercial banking sector. The results suggest that a negative one standard deviation shock to US GDP growth leads to an increase of 1600 in the number of mortgages in arrears for at least 90 days. Arrears are driven by unemployment and negative equity in the model. We discuss policies to contain the mortgage crisis by improving these intermediate target variables.