As a social science, economics cannot be reduced to simply an a priori science or an ideology. In addition economics cannot be solely an empirical or a historical science. Economics is a research field which studies only one dimension of human behavior, with the four fields of mathematics,...

The share of government expenditures in GDP has displayed steady increase in both developed and developing countries during the 20th century. This observation has led economists to explore the reasons and the underlying mechanism both theoretically and empirically. Several hypotheses on the...