The Reserve Bank of Australia signaled its confidence in the country"s economic health when it became the first G20 central bank to raise interest rates since the global downturn began more than a year ago. But not every country is daring enough to break from their massive stimulus plans. The recession-stricken Western countries, in particular, may still need time to bottom out. In an article recently published in the China Securities Journal, Zhao Zhongwei, senior economist with the Chinese Academy of Social Sciences, raised worries that the unsynchronized stimulns withdrawal may pose a threat to the stability of the global economy. Edited excerpts follow: