[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{{U}} (36)
{{/U}}data both on resources of consumers and on the{{U}} (37)
{{/U}}that tend to encourage or discourage money spending.
If an economist were asked which of three groups borrow most — people with
rising incomes, {{U}} (38) {{/U}}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{{U}} (39) {{/U}}about earning and spending are not always{{U}}
(40) {{/U}}. Another traditional conclusion is that if people who have
money expect prices to go up, they will{{U}} (41) {{/U}}to buy. If they
expect prices