أثر فترة الابطاء على مشتقات البترول فى السودان للفترة 1970-2014م

Abstract

Economic countries suffer from regression functions sometimes suffer from auto correlation problem, which affects the economic variables. The study aimed to check the existence of the auto correlation problem in the consumption function  of the petroleum products. for the period from(1970-2014) The study problem: is the consumption function of the petroleum goods suffer from the auto correlation problem? the  study hypothesis :the consumption function of the petroleum goods  suffer from  auto correlation  problem . Importance of the study :the demand of the petroleum  goods is very important and increasing  in the spite of the increasing in the price .The methodology of the study : the study used the descriptive analytical  method and applied (OLS) and ( E-views) programs on time series data collected from the annual reports  about the consumption function of petroleum products and petroleum consumption ,prices petroleum , growth national income , and inflation of the consumption function    .The results of the study :the demand for the petroleum goods depends on the current income for the top level of the  previous  income? , means the time series  model for the consumption function of the petroleum goods suffer from the auto correlation problem .The study recommended  that the makers of macro policies should care for relation between the independents variables which are effects  on the consumption  function of the petroleum goods  to maximize  the consumption .