Suppose that we find that temporary income shocks (such as those due to weather fluctuations) have small effects on the consumption of a household. Then this is prima facie evidence that households can smooth such shocks, but the smoothing may arise from self-insurance, credit, or mutual insurance. If you have data on consumption and income for the household over several periods of time, discuss how you might use the intertemporal data to distinguish between these three sources of smoothing.