01Introduction to economics10 questions1.2 How do economists approach the world?10 questionsStartChoose a focusPositive statements1 questionNormative statements1 questionCeteris paribus1 questionSampling evidence1 questionCorrelation and causation1 questionEconomic models1 questionTesting a policy1 questionModel revision1 questionInterpreting policy evidence1 questionEvaluating advice1 question