...In various countries of the world, governments have favored the construction of refineries from either private or state owned companies, ignoring the potential financial losses. The motive behind this policy is to save foreign exchange by importing crude oil, which is cheaper than importing oil products. In addition, the existence of a refinery within a country’s borders helps to promote economic growth and employment. To make the projects attractive to investors, the governments regulate in favor of local refineries by increasing import taxes on petroleum products and in some cases even prohibiting imports entirely...