《管子·山至数》
上年的粮食有两分在下，下年的粮食有两分在上，两年有四分粮食在上。则只有一分在民间流通，粮价可继续上涨到三倍。
上岁之二分在下，下岁之二分在上，则二岁者四分在上，则国谷之一分在下，谷三倍重。
If there are two portions of grain at the bottom of the previous year and two portions of grain at the top of the next year, four portions of grain will be at the top in two years. Then only one portion will be in circulation in the market, and the price of grain can continue to rise three times.