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1.utility is want satisfying strength of any thing. If an individual gets higher utility from the low paying job he might accept that in comparison to its counterpart.
2.Each compartment can execute certain duties without interfering with the actions of other cells because to compartmentalization.
3. Factor endowment theory: It states that countries are abundant in different types of resources. So, it is obvious that countries will have different capital to labor ratio. It is used to understand countries's comparative advantage. It is evident that there is difference between productivity of countries. Some countries have advantage because they are richly endowed with certain natural resources.
Countries like Saudi Arabia with plenty of oil reserves can produce oil very cheaply.Saudi Arabia's inexpensive production of oil helped them gain comparative advantage over other countries and export oil to finance their imports and gain high revenue. Yes, factor endowment theory is a good predictor of trade patterns. It is used to determine comparative advantage between countries. It states that the country will have comparative advantage in a resource with which it is heavily endowed. A country should focus on the good in which it has comparative advantage. Because it is heavily endowed with the resource that is involved in producing that good, it will have comparative advantage.

4.National Competitive Advantage: It states that qualities of the home country are vital to the success of the company. A nation's competitiveness is based on the ability of its industries to innovate and upgrade. Saudi Arabia's vision 2030 is going to be the most comprehensive economic reforms package. It involves privatising entire sectors for raising non oil revenues and cutting subsidies. It also involves going public with national oil company I.e., Saudi Aramco. The oil industry is expecting a little downward trend in coming years and surge in youth in coming years. Thus Saudi is concentrating on unemployment.