“The density of settlement of economists over the whole empires of economic science is very uneven, with a few areas of modest size holding the bulk of the population. […]
John Maynard Keynes (1936), The General Theory, Preface.
The [Economic] Heartland is more overpopulated than ever, while rich lands in other parts of the empire go untilled.”
“The less then we trouble ourselves with scholastic inquiries as to whether a certain consideration comes within the scope of economics, the better. If the matter is important let us take account of it as far as we can.”
Alfred Marshall (1890) Principles of Economics, Bk.I,Ch.II, par.35.