The life expectancy of East Germans has risen sharply since their state was reunified with the more prosperous West in 1990, a new study shows. Reunification added 6.2 years to the life of men in the former East and 4.2 years to their female counterparts, according to calculations by Tobias Vogt, of the Max Planck Institute for Demographic Research, that were published ahead of the 25th anniversary of the fall of the Berlin Wall this year. If East Germany still existed, boys born in 2011 could expect to live to the age of 70.9, while girls would have a life expectancy of 78.7 years, the study showed. But in a reunified Germany boys born in 2011 were forecast to live to 77.1, and girls to 82.9. Mr. Vogt cited improvements in medical treatment and an improved standard of living as the reason.