The population might have grown faster than the amount of holiday accomodation supply did, coupled, I would guess, with there being much more demand from international visitors just generally.

Perhaps there is also higher income inequality between workers? I’m not sure about Italy specifically, but generally there has always been inequality, but it has usually between the upper class that didn’t have to work and the lower class that did. I would guess the upper class would holiday whenever they wanted? I would assume that now there’s a large group of middle class workers given time off at the same time, and they would be a lot more cashed up and in direct competition for accomodation and travel fares with the lower class workers.

So plenty of reasons that could be the case. I imagine the huge growth in international tourism meaning huge numbers of visitors would be the biggest contributor.

The cost of holidays in Italy has gone up a lot in comparison to real wages in the last decades (also because the expectations for a holiday are on average much higher now).

Probably the influx of foreign tourists, pricing out the domestic tourists?

Checking Eurostat for nights spent at tourist accomodation

2007: 213 mn domestic 163 mn foreign

2018: 212 mn domestic 217 mn foreign

https://ec.europa.eu/eurostat/databrowser/bookmark/cbe7ecda-...

edit: Eurostat is great! Hotel occupancy is also up, indicating that prices should also have gone up. This is even in an environment with the rise of AirBnBs

https://ec.europa.eu/eurostat/databrowser/bookmark/9f9a92e0-...

Maybe more people in jobs where you can easily take a week off without it effecting much. Farmers probably can’t be away for a week during the summer.