The book is a compendium of three research articles on different dimensions of the Colombian economy. The first paper aims to analyse and quantify the effects of shocks originated in the US financial markets on the major Colombian financial markets. It was discovered that US markets generate significant overall spillover effects on the Colombian stock market. The second paper investigates the uncertainty and interdependence between the Colombian stock market and the main international markets. The results show that the subprime crisis period generates a significant positive effect on the conditional volatility. The last papers research is to review the monetary policy schemes that a central bank uses to stabilize an economy. Furthermore, it synthesizes the monetary policy schemes in a proposal that raises a monitoring scheme for full employment with economic and financial stability.