استخدام اسلوب طريقة التقدير الحصينة ( M ) في تقدير معلمات انموذج الانحدار الخطي لتحليل واقع إنتــاج و استهــلاك محصولي القمــح والشعيــر في العراق للمدة ( 1975 – 2009 )

Abstract

            The aim of this study is to showing that analyzing the trends of production and consumption are very important in economical studies especially in crops like wheat and barley because they are form an important part of the food security and strategically storage , and so that (OLS) was the most using way in such analyzing , but it is influence on statistical testing for significance of   parameters  estimations of linear regression model if the errors distribution were up normal . This study trying to proof that by analyze production and consumption trends of wheat and barley , it is used ( M ) method in analyze which depends on robust and it gives (3) results  for its own interest for analyzing ( wheat production , production and consumption of barley ) instead of one result to ( OLS ) in wheat consumption .