DangBaekJeon result, DangBaekJeon became bad money, and SangPyeongTongBo became good money. This is related to Gresham's law, which is a monetary principle stating that "bad money drives out good". The casting of DangBaekJeon was stopped in April 1867. The next year, its distribution was stopped because of an appeal from Choe Ik-hyeon(Hangul: 최익현, Hanja: 崔益鉉), a janglyeong(Hangul:장령, Hanja: 掌令) in Joseon Dynasty. He insisted that DangBaekJeon affected adversely to all classes of the society in the past two years. After its distribution had stopped, DangBaekJeon was exchanged with SangPyeongTongBo or China money(Hangul: 청전, Hanja: 掌令) and was used in iron. Dangbaekjeon
Say's law real shocks cause recessions and that the market responds efficiently to these real economic shocks. Paul Krugman dismisses Say's law as, "at best, a useless tautology when individuals have the option of accumulating money rather than purchasing real goods and services". It is not easy to say what exactly Say's law says about the role of money apart from the claim that recession is not caused by lack of money. The phrase "products are paid for with products" is taken to mean that Say has a barter model of money; contrast with circuitist and post-Keynesian monetary theory. One can read