in the sense suggested in the text [in association with the art of political economy]; to designate the application of economic theory to the interpretation and explanation of particular economic phenomena, without any necessary reference however, to the solution of practical questions; to mark off the more concrete and specialized portions of economic doctrine from those more abstract doctrines that are held to pervade all economic reasoning. (1917, 58–59) and applying theories of economy on what we have in reality to get a healthy enterprise and business prosperity.