Sitting on an airplane, you are chatting with the person sitting
next to you. That person asks you some questions about time series
and macroeconometrics. What do you say? 1. What is the big deal about stationarity? 2. What’s the Phillips curve? 3. What is an expected value and how does the expectation
operator (i.e. the E in E(X+Y)) work? 4. What are the rules of the variance operator? 5. What does it mean for a sum to be convergent? In discussions
of time series, why do we care about sums converging? 6. What are the ACFs and PACFs useful for?