The study looked at how prices are set in Italy, focusing on how long prices stay the same and how often they change. Prices tend to stay the same for about 10 months on average, with non-energy goods and services having longer unchanged periods than energy products. Prices are more likely to go up than down, and changes in price are usually similar in size. Big modern stores tend to change prices more often than traditional shops. Prices in the services sector tend to change at the same time.