Spanish Abstract: Mediante un modelo de equilibrio general computable, en el que se discrimina un sector informal en la economia, se modela el sector formal como un mercado de competencia monopolistica. Ademas de incluir mercados de trabajo discriminados, este modelo tambien evalua el impacto del creciente flujo de inversion extranjera, del aumento de precio de los bienes basicos, y del aumento del volumen de las exportaciones sobre la economia colombiana. Se concluye que algo mas de la mitad del crecimiento observado puede explicarse por el efecto de los factores mencionados. No obstante, se senala la importancia de las politicas internas para aprovechar las coyunturas favorables, y para minimizar el efecto de circunstancias negativas sobre el desempeno economico.English Abstract: Based on a computable general equilibrium model, in which an informal sector in the economy is discriminated, the formal sector is modeled as a monopolistic competition market. In addition to include discriminated labour markets, this model also includes the assessment impacts such as the increment of:foreign investment flows, price of commodities, and the volume of exports in the Colombian economy. This paper concludes that just over half of the observed growth can be explained by the effect of the above factors, and highlights the importance of domestic policies to take advantage of the good times, and to minimize the effect of negative circumstances on economic performance.