Which of these failures is problematic for your model and which is not? Why?
Suppose that you want to write down a model to explain the observed relationship between interest rates and aggregate economic spending. Suppose that you want to test other predictions of your model. You consider two such predictions. First, your model predicts that there is no relationship between interest rates and temperature, but in the data there is a mild negative relationship. Second, your model predicts that consumption and income are negatively correlated, whereas they are positively correlated in the data. Which of these failures is problematic for your model and which is not? Why?
