Nobel prize laureate Robert A. Mundell of Canada argues against a revaluation of the renminbi during a speech for the Nobel Laureates Beijing Forum 2005 at the Great Hall of the People in Beijing, May 30, 2005. [AP/File]

China should stabilize the exchange rate of renminbi (RMB) against the US dollar to study the effect of its accumulated appreciation of close to 10 percent over the past two years, 1999 Nobel Laureate in economic sciences Robert Mundell said in Hong Kong on Wednesday.

Speaking at a lecture at the Chinese University of Hong Kong, Mundell said "it is time to pause the appreciation of RMB and let it stay at a stable level."

China abandoned its policy of pegging the renminbi to the US dollar in 2005 and the currency's exchange rate against the dollar has rose close to ten percent since then.

Refuting an argument that says the RMB is undervalued, thereby leading to the US trade deficit, the father of the euro cited figures to note that China's trade surplus against the United States only contributed a small portion of the US deficit.

Number megatrends in the world economy, including the unprecedented global expansion, globalization, the IT revolution, the success of the euro, the rise of China, among others, have led to "global imbalances, reflected in a huge current account deficit of the US," Mundell said.

The dollar deficit is "endemic in the dollar system" and cannot be explained by the fixed rate of the RMB or the Japanese yen, Mundell said, adding that the dollar deficit has persisted since the end of the dollar shortage in the 1950s.

The 2005 Nobel Laureate in economic sciences Thomas Schelling, along side Mundell at the Chinese University of Hong Kong, lectured on nuclear nonproliferation, and Edmund Phelps, winner of the 2006 Nobel Prize in economic sciences, lectured on the importance of finance professionals in the development of modern economies.