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Introduction into macroeconomic modeling foundations

Dobrescu, Emilian (2001): Introduction into macroeconomic modeling foundations. Published in: Romanian Journal of Economic Forecasting , Vol. 1, No. Supplement 1 (2002): pp. 39-88.

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Through their goals, the macroeconomic policies aim to the near or farther future, this being the reason for which evolutions have to be anticipated. Deliberately or not, the decision-makers continuously operate with mental schemes of prospective nature. Many times, these procedures are purely empirical. But, no matter how much 'trained', the intuition has its own limits that can be overcome only through rigorous modelling techniques. Modern economy management placed itself unequivocally on the second path. This impulse, together with the progress in macroeconomics and computational techniques formed the background for the spectacular development of macroeconomic modelling in the second half of the 20th century. There are many data banks for macromodels. One of the most comprehensive seems to be the one built and continuously updated by the Hamburg Institute of Statistics and Quantitative Economics. In mid 2001 there were around 4500 such models (see Appendix 1), an amount - we must admit, impressive - that indicates the very high interest in the entire world in this instrument of analysis and forecasting. The first place was held by United States, with 495 models, but also other developed countries were recorded with important figures: Germany (Federal and former Democratic together) - 343, United Kingdom - 213, Japan - 207, France - 152, Italy - 130, Canada - 126, the Netherlands - 122, etc. In other regions, including the Central and East European countries, modelling also expanded significantly. In fact, since 1967 - under the aegis of the United Nations Organization - the LINK Program is carried out, which promotes this technique at world level, with the participation of well-known specialists. The current paper aims to examine the following issues: A. What is an economic model? B Economic models typology, C. The sequences of the numerical modelling process.

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