This lesson explores different types of inflation and terms associated with this economic concept. You may have heard relatives talk about the good old days when a dollar would buy something. What happened to that dollar? Why won't it buy as much as it did last month or last year? What happened is inflation. In this lesson you will examine the various causes and theories of inflation as well as how it affects different groups in the economy such as savers, lender, and people living on fixed incomes.