没听说过这种理论。有两个近似的。
有个消费的随机游走模型(Random walk model of consumption),由Hall(1978)给出。
另外,Nelson and Plosser(1982)曾经运用 ADF 方法对美国14个宏观经济学序列进行了单位根检验,结果发现13个序列(包括名义GNP和实际GNP)都含有单位根。这算是“GDP随机游走理论”?
Hall, Robert (1978). "Stochastic Implications of the Life Cycle-Permanent Income Hypothesis: Theory and Evidence". Journal of Political Economy 86 (6): 971–987.
Nelson, Charles R. and Plosser, Charles I. (1982), "Trends and Random Walks in Macroeconomic Time Series: Some Evidence and Implications," Journal of Monetary Economics, 10, 139-162