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Within the scope of Algeria's quest to consolidate its commercial relations with other countries of the world and directing its efforts and its economic policy towards increasing trade exchange and economic growth, this study aims to measure the response of the financial policy to the shocks of the rate of trade exchange in Algeria from 1990 to 2018, by using the variables rate of trade exchange, public revenues and public expenditures, by estimating the VAR model, conducting Granger causality test, the impulse response functions and analyzing variance decomposition. The study concluded that the occurrence of any random shock in the rate of trade exchange affects the fiscal policy, by affecting negatively and directly the public revenues starting from the second year, while the impact on public expenditures is positive, weak and fluctuating during the response period.

This study aims to estimate the consumption spending function using the theory of relative income in Algeria for the period (1975/2018), by focusing on the following variables: consumption spending, disposable personal income, the highest previous income. To complete this study, we should conduct Vector Autoregressive model VAR, Grange causality test, study response function and analyze variance components. The study concludes that the variables explain the consumption spending for the current year by 99.86%, and that creating any random shock in the disposable personal income affects consumption spending directly and positively and becomes negative starting from the fifth year, while causing a random shock at the highest previous income affects consumption spending directly and positively during the study period.