Any of these effects has a serious consequence on a national economy since this subset of the traditional GNP model is most probably equal to the GNP, although it is not accounted for in economic reckoning. There are those who would argue that the real economic valuation should be based on Gross National Output (GNO) which is more attuned to the production model. Were this case, the role of the entrepreneur takes on a larger meaning in national valuation since she or he is a principal player within the subsystem.