All the progress made by the economists who established the theory of welfare, are based on the needs for the progress in engineering that marked out the era of the industrial revolution. All the models that go along with these theories are based on the science of engineering and contributed at...

The traditional concept of a strict minimum of nontaxable income equal for all taxpayers embedded in most current income-tax systems is the result of a paradox of fiscal egalitarianism. The paper shows that substituting the traditional notion of a strict minimum of nontaxable income for a scheme...

With the continuous development and iteration of telecommunication technology, the users' requirements of the quality and service have increased dogmatically. In order to meet the diverse and personalized consumer demands, virtual network operators came into being. In 2013, China officially...