A small macroeconometric model designed to analyse the major macroeconomic aggregates in the open economy of Greece is presented. The specification of the model is based on the assumptions of the ‘Monetary Approach to the Balance of Payments and Exchange Rate determination’. Also, it contains an Expectations Augmented Phillips Curve and consists of seven equations. The empirical findings suggest that for the period 1954–81, the Greek economy did not behave consisently with the particular theoretical or other persuasion model. However, the empirical model tracks reasonbly well the historical values of the endogenous variables and it captures the cyclical behaviour of the economy. The evidence suggests that monetary policy had no significant influence on output growth with its role being confined on determining the balance of payments. On the contrary, fiscal policy played a dominant role in output determination and prices variation.