Here in Finland, we have a good trial population: Finnish-Swedes. They are genetically very similar to Finns, but despite being bi-lingual, and wealthier than

Here in Finland, we have a good trial population: Finnish-Swedes. They are genetically very similar to Finns, but despite being bi-lingual, and wealthier than native population, they are very slightly duller. (1-3 iq points).