the analysis of effect of economic instability (with emphasis on budgect deficit (surplus) on economic growth in iran.

to day reaching a high economic growth rate is one of the main and important aim of any economic system. today the economists accept that economic stability is a necessary issue, but is not enough for the economic growth, while economic instability is one of the main elements, which restrict economic growth. the aim of this research is analysis of the effect of stability index of economy on economic growth in the country and to reach the mentioned aim spain has been used. the main results obtained are as follows : the effect of real budget deficit ratio to gdp on economic growth rate at the time of study (1973-2006)on short and long run is negaitive and meaningful. the effect of inflation and exchange rate has negative impact on the economic growth of iran during the study the short and long run .during the study the effect of government consumption expenses ratio to gdp on economic growth is negative and finally the effect of government investment expenses to gdp on economic growth is positive.in as much the effect each of three indexes economical instability on economic growth of iran has been negative and the result show