Greg Mankiw Quote
Economists try to address their subject with a scientist's objectivity. They approach the study of the economy in much the same way a physicist approaches the study of matter and a biologist approaches the study of life: They devise theories, collect data, and then analyze these data in an attempt to verify or refute their theories.
p. 20 - Principles of Economics (2015) - Ch. 2. Thinking Like an Economist