Regional development in Croatia and Hungary is a big issue because some areas are growing faster than others, causing problems for the whole country. The European Union is helping by giving money to reduce these differences. Both countries are working on making their regions more equal, but there is still a lot of work to do. The researchers looked at the reasons why some regions are doing better than others, like economic and social factors. They also talked about ways to make regions more competitive and how local people can help with development. The main goal was to find ways to make regional development better in Croatia and Hungary.