The present paper, following the philosophical work of Robert Nozick, intends to develop the approach of simplicity in the economic investigation. This purpose contributes to structure a heuristic for projects of investigation that can serve like mark of discussion of grade projects in the departments of economy. The objective is the philosophy of the economy. We develop the following aspects basically: (1) An elucidation of the approach of simplicity in the academic investigation (2) Arguments in favor of the simplicity in the classic tradition from Adam Smith (3) An illustration of the pattern of explanation economic type invisible hand (4) We argue in favor of continuing with this focus.