Is there a correlation between the percentage of sunlight (or cloud cover) and the overall economic prosperity of a state or nation?
Looking at states; take the five permanent members of the UN security council: USA, Russia, Britain, Germany, and China. I take these 5 because in one way or another they have demonstrated considerable power and/or prosperity, thus enabling them to secure those permanent seats. I can hardly believe the USA, Germany, and Britain can be counted among the most popular destinations when one is looking for a sunny vacation. As for Russia and China... i don't know enough about them to made a claim. On the other side, states such as Italy and Spain have high rates of annual sunlight and are (arguably) on the weaker end of the economic spectrum among the core EU states. I would imagine that a considerable amount of adjustments would have to be made in order to account for political and other factors.
... just a thought. Would be kind of interesting bit of knowledge. What would some of be the implications be if a strong correlation did exist?