12 econometrics questions for you: 1. What is the purpose of econometrics and how does it relate to economics? 2. What are the assumptions of the classical linear regression model? 3. What is multicollinearity in regression analysis and how does it affect the results? 4. How do you interpret the coefficient of determination (R-squared) in regression analysis? 5. What is heteroscedasticity and why is it a problem in regression analysis? 6. What is the Durbin-Watson statistic and what does it measure? 7. What is the difference between endogeneity and exogeneity in econometrics? 8. What is the difference between a fixed effects model and a random effects model? 9. How do you test for autocorrelation in time series data? 10. What is the purpose of instrumental variables in econometrics? 11. Explain the concept of stationarity in time series analysis. 12. How do you evaluate the goodness of fit in a logistic regression model?