The idea that Americans with different financial circumstances can be affected in vastly different ways by recessions is such a simple and obvious one that it's embarrassing to admit to not having thought about it much before.
Looking carefully at how different people fare during these ups and downs is one thing top of mind at the Federal Reserve Bank of Minneapolis, because its Opportunity and Inclusive Growth Institute built its recent spring conference around what it called "distributional consequences" of the business cycle.
The Federal Reserve doesn't seem to be the best government institution to dig into the topic, given its limited policy options. On the other hand, it's one of the few federal government institutions that seems functional enough right now to ask good questions and try to answer them with data.
The economists whom the Minneapolis Fed invited may argue about theory over beers, but from the front of the room earlier this month they talked about what they had found in their data.
One stunning chart that appeared on the screen showed how since 1969 the wage ratio between the top 10% of 25-year-old male workers and the bottom 10% has about tripled.
Back when older baby boomers were just entering the workforce, top earners earned about $3 for every buck earned by those in the bottom 10%. By 2012, the ratio had surged to $9 in wages to every $1 for those at the bottom.
You can't say something happened in the labor market to cause that big surge in inequality, Fatih Guvenen of the University of Minnesota explained. Remember, he said, this is a measure of pay when workers were just starting out. Something in the system is very different before any of them look for their first job.
This observation came near the end of a talk that was mostly about something else, how Guvenen and his research partners found that income volatility has actually been in a gentle decline. That's not what people had been telling researchers through surveys, as people seem convinced that there are now sharper ups and downs and that their household finances seem more fragile.