Missing institution and savings substation : precautionary savings of chinese farm households and hypothesis test . cao heping 制度缺失与储蓄替代中国农户防卫性储蓄机制的行为发现与理论检验曹和平
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On the new distribution principle of china . xue hanwei the 21st century monetary system and asian regional currency . cao he ping 20世纪世界货币体系的三大缺陷兼论21世纪世界货币体系和亚元建立的设想曹和平