Suppose you are interested in predicting the three-month government bond rate based on factors listed in the excel file intdef.xls.

The definition of the variables of interest is presented in the table below:

Variable	Definition / Unit
I3	three-month government bond rate.
inf	inflation rate based on the consumer price index.
def	government budget deficit as a percentage of the GDP.

Consider the following model:

I3_t = B₀ + B₁inf_t +B₂def_t +u_t

10. Assume serial autocorrelation is established, what are two possibilities you might do to correct for this violation of OLS assumptions?(2 marks)

11. Write down the null and the alternative hypothesis to test the normality assumption.(2 marks)

12. Conduct Bera_Jarque test to test the hypothesis stated in part 11.(3 marks)

13. Assume that normality is violated, what are two possibilities you might do to correct for this violation of OLS assumptions? (2 marks)