@article {2019,
	title = {A machine is cheaper than a human for the same task},
	journal = {AI \& SOCIETY},
	year = {2019},
	month = {Feb-01-2019},
	issn = {0951-5666},
	doi = {10.1007/s00146-018-0874-0},
	author = {Pereira, Lu{\'\i}s Moniz}
}
