By late 1991, some South Korean policy analysts, having had more time to study the "economic" costs of German reunification, began to voice their own doubts about the desirability of replicating the German experience. For example, the Korean Development Institute, a South Korean government-affiliated think tank, determined that a sudden and unplanned Korean reunification, such as took place in Germany, might come with a ten-year price tag of $800 billion. The South Korean government would have added yearly expenses of approximately $47 billion for each of the first four years, an amount approximately equal to the government's yearly budget at the time. A slower, planned reunification would, according to the institute, greatly reduce these costs; estimated government expenditures would be cut by more than half.20