The report assesses three major categories that determine the economic dynamism and institutional quality of each member state’s territorial divisions.
The report gave Andalucia a score of -0.51 in the corruption sub-category, the lowest of the 17 regions.
It was followed by Galicia and the Canary Islands, who received scores of -0.5 and -0.48 respectively.
La Rioja topped the list and was above the EU average with a score of 0.11.
It was followed by Murcia with 0.01 and Pais Vasco with -0.05.