"OOH, when included, is typically the biggest component of the CPI. However, many coun-tries exclude OOH from their CPIs on the grounds that it is too difficult

"OOH, when included, is typically the biggest component of the CPI. However, many coun-tries exclude OOH from their CPIs on the grounds that it is too difficult to measure. Inparticular, the harmonized index of consumer prices (HICP) in the European Union (EU) cur-rently excludes OOH." [1] OOH stands for owner-occupied housing. I am aware of the fact that the US accounts far better for housing expenses in its CPI than Eurozone countries do. [1]https://epub.wu.ac.at/7039/1/WP285.pdf https://epub.wu.ac.at/7039/1/WP285.pdf