According to some estimates, the cost of living on Croatian islands is up to 30% higher than on the mainland

Omissions

• No source explicitly stating a 30% cost-of-living differential between Croatian islands and the mainland was found.
• The only relevant source located (Al Jazeera Balkans, 13 June 2020) gives a figure of about 20% and refers specifically to one island town (Komiža), not to Croatian islands as a whole; it is also more than 2 years old relative to the session date.
• The claim attributes the figure to unspecified 'estimates', so the original data behind the 30% cannot be traced or assessed.

Sources

• SecondaryAl Jazeera Balkans — 'Teško je, ali život na otoku ne bi mijenjali'I inače su cijene na otocima više nego na kopnu. U prodavaonicama u Komiži te cijene su više oko 20 posto. Tako je i po kafićima... (Prices on the islands are generally higher than on the mainland. In the stores in Komiža these prices are about 20 percent higher.)
• SecondarySlobodna Dalmacija — 'Da smo i to dočekali: ista spiza u dućanima oko Splita jeftinija je nego u susjedstvu, ali na Hvaru ima i iznenađenja'Kilogram domaćih grapolo rajčica u 'Konzumu' u Kaštelima je 2,05 eura, dok je u Konzumu u Hvaru 2,19 eura, što je također razlika od 14 centi... (A kilogram of domestic grapolo tomatoes in Konzum in Kaštela is 2.05 euros, while in Konzum on Hvar it is 2.19 euros, also a difference of 14 cents — i.e. roughly 7%.)