The study looked at how changes in prices in different U.S. cities can affect inflation. They found that when prices vary a lot between cities, inflation tends to go up. This suggests that supply-side factors, like changes in prices, can impact inflation. However, in the early 1980s, other factors like monetary policy had a bigger influence on inflation. The study also found that the shape of the price distribution (skewness) doesn't have a strong relationship with inflation when other economic factors are taken into account.