What was one of the main problems with states controlling their own currency?

What is the definition of industrial capitalism and how has it shaped modern economic systems? If nothing is done to change Social Security, what can a 26-year-old individual in 2006 expect to receive in retirement benefits from the program? What is the common features of excise duty and custom duty? Is Qualitative factors more important in business decision making as compared to quantitative factors? What effect does a reverse stock split have on the price of shares given we have 1600000 shares outstanding and the share price is 35 cents and the split is reverse 1-20 what is the final price? What is the value of a 1904 silver dollar? What is the value of a elizabeth bullion coin? How many kilograms are in 110 pounds? How much was 1000 dollars worth in 1972 compared to 2009? What do you call the group of people who sell their labor in exchange of an income? What is gross national product at current price? What is the Wrigley's united profit sharing coupon worth? What are the main economic activities in North Korea? How do you think the insurance companies select the criteria that to determine the cost if your premium? What is the meaning of the phrase good harvest? Why is a highly competitive market preferred by economists? Is it true that Supervisors rarely use the laissez-faire leadership style because the nature of the supervisor's job requires close involvement with employees? What has been adjusted to remove inflation is called nominal GDP? What is the voluntary exchange of good and or services? In recent years which state has produced more corn soybeans and hogs than any other?