I used the same data that I used for the map yesterday but plotted the ratio against median total earnings. Partly this was to see if there is a pattern to discern in North Dakota counties such as higher median earnings leading to an increasing or decreasing parity ratio. To assist in this examination, I added a linear regression line and a confidence interval and this is what I found.
So employment data in North Dakota occupied most of my thoughts over the last week or so. I thought it time to take a quick look at earnings data from the Bureau of Economic Analysis. Quite often I hear people mention the concept of diversification with a local economy as if it represents a buffer against downturns. I am still thinking about; I am not sure I buy it either in part or in whole. That will need to wait for another day.