Here we announce that an ever largest mistake of macroeconomics was discovered. br It began from a simulation by using Excel sheet. br Its impacts are very large and it can be named as exactly the largest on our human's economical history. br But the impacts are all good impact. br We can build much stable economy than before. br This easy mistake can be understood by the ordinary people too. br This is a video for the world people in order to inform this "Good news". br br You can read a digest news paper at the next URL. br br br br The related books are sold at the following URL including FREE edition.