This thesis is composed by three papers connected to the study of the business cycle of small open economies under a double prospective: the consequences related to the transmission mechanism of global shocks and the employment of forecasting methods to date future economic developments at national level. Specifically, the first chapter analyses the role of international shocks on a small non-oil commodity-exporting economy, using Australia as representative case. The Australian natural resource sector is independent from oil and this is a single feature among developed resource-rich countries. Identifying global shocks through a combination of sign and bounds restrictions, the results reproduce the main stylized features commonly document...