More than half of South Korean business executives say there's more to gain than lose when the two Koreas are unified, according to results of a government survey released Thursday.

South Korea's Unification Ministry commissioned a poll on 1,015 businessmen as part of a broader effort to get feedback about issues surrounding re-uniting with North Korea. A key finding: about 58% of respondents said they agreed with the statement that the benefits from unification would be bigger than the cost, while 39% disagreed.

But...