Systemic risks are most likely to exist with regard to

Assuming there are no capital gains, a nation's wealth at the start of a year is equal to the wealth at the start of the previous year plus

A) income. B) nothing because wealth does not change from one year to the next. C) income minus saving during the year. D) saving during the year. E) saving minus depreciation during the year.

HAC standard errors should be used because

A) they are convenient simplifications of the heteroskedasticity-robust standard errors. B) conventional standard errors may result in misleading inference. C) they are easier to calculate than the heteroskedasticity-robust standard errors and yet still allow you to perform inference correctly. D) when there is a structural break, then conventional standard errors result in misleading inference.