【正文】 unemployment is a positive statement. It deals with how the economy is, not how it should be. Since economists have examined data and found that there is a shortrun negative relationship between inflation and unemployment, the statement is a fact, thus it is a positive statement.b. The statement that a reduction in the rate of growth of money will reduce the rate of inflation is a positive statement. Economists have found that money growth and inflation are very closely related. The statement thus tells how the world is, and so it is a positive statement.c. The statement that the Federal Reserve should reduce the rate of growth of money is a normative statement. It states an opinion about something that should be done, not how the world is.d. The statement that society ought to require welfare recipients to look for jobs is a normative statement. It doesn39。t state a fact about how the world is. Instead, it is a statement of how the world should be and is thus a normative statement.e. The statement that lower tax rates encourage more work and more saving is a positive statement. Economists have studied the relationship between tax rates and work, as well as the relationship between tax rates and saving. They have found a negative relationship in both cases. So the statement reflects how the world is, and is thus a positive statement.8. Two of the statements in Table 2 are clearly normative. They are: 5. If the federal budget is to be balanced, it should be done over the business cycle rather than yearly and 9. The government should restructure the welfare system along the lines of a 39。negative ine tax.39。 Both are suggestions of changes that should be made, rather than statements of fact, so they are clearly normative statements.The other statements in the table are positive. All the statements concern how the world is, not how the world should be. Note that in all cases, even though they are statements of fact, fewer than 100 percent of economists agree with them. You could say that positive statements are statements of fact about how the world is, but not everyone agrees about what the facts are.9. As the president, you39。d be interested in both the positive and normative views of economists, but you39。d probably be most interested in their positive views. Economists are on your staff to provide their expertise about how the economy works. They know many facts about the economy and the interaction of different sectors. So you would be most likely to call on them about questions of fact190。positive analysis. Since you are the president, you are the one who has to make the normative statements as to what should be done, with an eye to the political consequences. The normative statements made by economists represent their own views, not necessarily your views or the electorate’s views.10. There are many possible answers.11. As of this writing, the chairman of the Federal Reserve is Alan Greenspan, the chair of the Council of Economic Advisers is R. Glen Hubbard, and the secretary of the treasury is Paul H. O’Neill.12. As time goes on, you might expect economists to disagree less about public policy because they will have opportunities to observe different policies that are put into place. As new policies are tried, their results will bee known, and they can be evaluated better. It39。s likely that the disagreement about them will be reduced after they39。ve been tried in practice. For example, many economists thought that wage and price controls would be a good idea for keeping inflation under control, while others thought it was a bad idea. But when the controls were tried in the early 1970s, the results were disastrous. The controls interfered with the invisible hand of the marketplace and shortages developed in many markets. As a result, most economists are now convinced that wage and price controls are a bad idea for controlling inflation.But it is unlikely that the differences between economists will ever be pletely eliminated. Economists differ on too many aspects of how the world works. Plus, even as some policies get tried out and are either accepted or rejected, creative economists keep ing up with new ideas.UNIT4SOLUTIONS TO TEXT PROBLEMS:Quick Quizzes1. A market is a group of buyers (who determine demand) and a group of sellers (who determine supply) of a particular good or service. A petitive market is one in which there are many buyers and many sellers of an identical product so that each has a negligible impact on the market price.2. Here’s an example of a demand schedule for pizza:Price of Pizza SliceNumber of Pizza Slices Demanded $ 109876543210 The demand curve is graphed in Figure 1. Figure 1 Examples of things that would shift the demand curve include changes in ine, prices of related goods like soda or hot dogs, tastes, expectations about future ine or prices, and the number of buyers. A change in the price of pizza would not shift this demand curve。 it would only lead us to move from one point to another along the same demand curve.3. Here is an example of a supply schedule for pizza:Price of Pizza SliceNumber of Pizza Slices Supplied $ 01002003004005006007008009001000 The supply curve is graphed in Figure 2.Figure 2 Examples of things that would shift the supply curve include changes in prices of inputs like tomato sauce and cheese, changes in technology like more efficient pizza ovens or automatic dough makers, changes in expectations about the future price of pizza, or a change in the number of sellers. A change in the price of pizza would not shift this supply curve。 it would only move from one point to another along the same supply curve.4. If the pr