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Kim Jong Un, the third son of the deceased leader, will take his place. Kim Jong Un is only in his late-twenties, and has only been groomed for the role since 2008, compared to his father's 14 years of training.
While North Korea has remained economically isolated from much of the world, its military aggression, volatile relationship with South Korea and the United States, and the uncertainty surrounding Kim Jong Un's readiness to lead has put the world on alert.
"This is a tinderbox situation," said Money Morning Chief Investment Strategist Keith Fitz-Gerald. "Almost nothing is known about Kim Jong Un, this "Great Successor.' The deeper questions are the longer-term issues related to a potential power struggle within the ruling elite, given that Kim Jong Un may not have the training nor the power base from which to assume control. Now is the time to watch carefully."
That said, here's what to monitor in the global economy as North Korea rebuilds after Kim Jon Il's death.
North Korea's economic future: North Korea is a notoriously closed society and has shunned foreign investment. Kim Jong Il had started to show signs of possibly being open to economic reform. He even toured Chinese factories to learn about their rapid economic growth, and visited Russia to discuss building a gas pipeline across North Korea.
Of course, that's unlikely to change at least until the country's new leader gets established.
Still, there's hope the long-term outlook for North Korea will change since Kim Jong Un has more Western world exposure than his father, having attended school in Switzerland. That could encourage him to reach out more to other countries to help improve his impoverished nation.
"With China as its example, I am hopeful that North Korea comes out of its shell and slowly crawls to its borders to see who is willing to start a dialogue and trading with the rogue robot nation," said Money Morning Capital Waves Strategist Shah Gilani. "If it's going to be a scary and not a salutary coming out party, all bets are off; but I'm a betting man, and I'm betting North Korea will emerge from its cocoon."
South Korea's economy: South Korea faces the biggest economic disruption. The country already forecast a drastic export slowdown for 2012, with shipments growing only 7.4% next year, compared to 19.2% in 2011. The threat of North Korean instability could also slam consumer confidence, and cause the economy to grow even slower than the 3.7% gain predicted for next year.