This paper introduces 4GM, a semi-structural model for monetary policy analysis and macroeconomic forecasting in Colombia. This model is based on a New-Keynesian rational expectation framework for an oil-exporting small open economy. In this paper, we present the model structure and examine the response of its variables to domestic, foreign and oil-price shocks. Further, we assess 4GM in terms of its historical shock decomposition and its out-of-sample forecasting.
Banks and other credit institutions are key players in the transmission of monetary policy, especially in emerging market economies, where the responses of deposit and loan interest rates to shifts in policy rates are among the most important channels. This pass-through depends on the conditions prevailing in the loan and deposit markets, which are, in turn, affected by macroeconomic factors. Hence, when setting their policy, monetary authorities must take into account those conditions and the behavior of banks. This paper illustrates this point by means of a theoretical micro-banking model and shows empirical evidence for Colombia suggesting that some aspects of the model might be relevant features of the transmission mechanism.
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