Estimation of the demand-supply system of the Egyptian gray cement using 2SLS-PC method | ||||
| مجلة البØوث المالية والتجارية | ||||
| Article 43, Volume 22, Issue 4, October 2021, Page 219-237 PDF (835.73 K) | ||||
| Document Type: المقالة الأصلية | ||||
| DOI: 10.21608/jsst.2021.93695.1323 | ||||
 View on SCiNiTO | ||||
| Author | ||||
اØمد سيد اØمد 
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| کلية التجارة - جامعة بورسعيد | ||||
| Abstract | ||||
| In this study, a simultaneous model describing the supply and demand system for Egyptian gray cement during time period 2006 until 2018 was estimated using the 2SLS-PC method, and it can be used in predicting the state of the Egyptian cement market. Gray cement represents an important strategic commodity and a major factor in the renaissance of countries for its use in infrastructure and construction works. The study aimed to identify the factors affecting the gray cement market in Egypt. The estimation of the majority of large simultaneous-equation models frequently suffers from a smaller sample than the number of predetermined variables so a meaningful first –stage regression isn’t possible or when the number of observations is small or too small compared with the number of predetermined variables Key words: Simultaneous equations model, two stage least squares (2SLS), principal components (PC), instrumental variables (IV), two stage least squares with principal components (2SLS-PC) and Theil’s forecast accuracy coefficient (U). | ||||
| Keywords | ||||
| Simultaneous equations model; two stage least squares (2SLS); principal components (PC); instrumental variables (IV); two stage least squares with principal components (2SLS-PC) | ||||
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