IDEALLY, MARIANNE KORKALAINEN’S high school in Rautavaara, a tiny town in eastern Finland, would enrol at least 20 new pupils each year. This autumn, her shrinking municipality will send her only about 12. But Ms Korkalainen, the head teacher, has a plan: she intends to invite half a dozen youngsters from poorer countries to help fill her empty seats. Eager adolescents from places such as Myanmar, Vietnam and Tanzania will swap their tropical cities for her snowy bolthole. They will receive a Finnish education, at Finnish taxpayers’ expense.