Economic freedom as a concept is defined as the degree of market economy within a nation.The variable of measure that is used is the Frasier institute Economic freedom of the world index (EFI).

• 负载预测方法虽然可使用自我回归模型，藉由过去的历史资料去推测出有时序性的电力负载趋势，但非时序因素仍明显地影响负载预测的准确性。