 and inflation. What's the current data say about that? So we'll pop out to the Bureau of Labor Statistics and we'll look at the consumer price index. We will look at the unemployment rates and we'll compare it to some of the data sets that he has in the text from the period in which he is writing. And that allows them to say that these theories aren't just there for a moment in time, but they are there over time. So even though that's a struggle at first for students, it empowers them to use the tools that we have available today