بوطوبة, محمدطويل, أحمد2024-06-042024-06-042019https://www.asjp.cerist.dz/en/article/103549http://dspace.univ-temouchent.edu.dz/handle/123456789/4168Monetary and fiscal policy has many tools and mechanisms used to control any deviation in the economic system, and return to the state of balance. The problem of the instruments and mechanisms contained in the fiscal and monetary policy in Algeria is not sufficiently effective in moving and controlling the Algerian economy. For this reason, we examined the most important variables, in order to collect the ones that are converging with each other through their degree of correlation. Finally, we need to activate the interest rate, the tax rate and the exchange rate to achieve efficiency in economic activity.tools and mechanisms of control, economic activity, Principal component analysis, economic machine, efficiency.