以往的经济增长波动研究多局限于长周期经济增长波动研究，研究方法多采用统计学相关知识。
The previous study of fluctuation of economic growth is limited to fluctuation of long-term economic growth and its research methods mainly use statistical knowledge.
在1998年以前广东省房地产波动大于经济增长波动，相对缺乏理性，并且两者增长率呈现相同的变化趋势。
Before 1998, Guangdong Province fluctuations in the real estate are more volatile than economic growth and both showed the same growth rate trends. All these phenomenons were lack of rationality.
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