填空题

A scientist who does research in economic psychology and who wants to predict the way in which consumers will spend their money must study consumer behavior. To form round conclusion, he must (36) data both on resources of consumers and on the (37) that tend to encourage or discourage money spending.
If an economist were asked which of three groups borrow most — people with rising incomes, (38) incomes, or declining incomes — he would probably answer: those with declining incomes. Actually, in the years 1947-1950, the answer was: people with rising incomes. People with declining incomes were next and people with stable incomes borrowed the least. This shows us that traditional (39) about earning and spending are not always (40) . Another traditional conclusion is that if people who have money expect prices to go up, they will (41) to buy. If they expect prices to go down, they will postpone buying. But research (42) have shown that this is not always true. The expectations of price increases may not (43) buying.
(44) . "In a few months," she said, "we’ll have to pay more for meat and milk; that is to say we’ll have much less to spend on other things we need. It’s really annoying." (45) . Furthermore, the rise in prices that has already taken place may be resented and buyer’s resistance may arise. (46) .