宏观经济学课件
合集下载
相关主题
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
• Classical model is still important – In recent decades there has been an active counterrevolution against Keynes’s approach to understanding the macroeconomy – Useful in understanding economy over long-run
– Powerful forces are at work that drive economy towards full employment • An important group of macroeconomists continues to believe that classical model is useful even in
Macroeconomic Models: Classical Verses Keynesian
• Keynesian ideas became increasingly popular in universities and government agencies during 1940s and 1950s – By mid-1960s, entire profession had been won over • Macroeconomics was Keynesian economics – Classical model was removed from virtually all introductory economics textbooks
• If we think in terms of decades rather than years or quarters, business cycle fades in significance • In the classical view, this behavior is no accident
– Many apparent disagreements among macroeconomists dissolve • If no time horizon is specified, however, an economist is likely to focus on horizon he or she feels is
• While Keynes’s ideas and their further development help us understand economic fluctuations— movements in output around its long-run trend – Classical model has proven more useful in explaining the long-run trend itself
宏观经济学课件
The Classical Long-Run Model
• Economists sometimes disagree with each other • Actually much more agreement exists among economists than there appears to be • Once distinction between long-run and short-run becomes clear
shorter run • In 1936, in midst of Great Depression, British economist John Maynard Keynes offered an
explanation for economy’s poor performance – Argued that, while classical model might explain economy’s operation in long-run, long-run could be a very long time in arriving
• Polices that can help us smooth out economic fluctuations may prove harmful to growth in the longrun – While policies that promise a high rate of growth might require us to put up with more severe fluctuations in short-run
most important – Something about which economists sometimes do disagree
The Classical Long-Run Model
• Ideally, we would like our economy to do well in both long-run and short-run – Unfortunately, there is often a trade-off between these two goals • Doing better in short-run can require some sBiblioteka Baiducrifice of long-run goals, and vice versa
Macroeconomic Models: Classical Verses Keynesian
• Classical model, developed by economists in 19th and early 20th centuries, was an attempt to explain a key observation about economy – Over periods of several years or longer, economy performs rather well
– Powerful forces are at work that drive economy towards full employment • An important group of macroeconomists continues to believe that classical model is useful even in
Macroeconomic Models: Classical Verses Keynesian
• Keynesian ideas became increasingly popular in universities and government agencies during 1940s and 1950s – By mid-1960s, entire profession had been won over • Macroeconomics was Keynesian economics – Classical model was removed from virtually all introductory economics textbooks
• If we think in terms of decades rather than years or quarters, business cycle fades in significance • In the classical view, this behavior is no accident
– Many apparent disagreements among macroeconomists dissolve • If no time horizon is specified, however, an economist is likely to focus on horizon he or she feels is
• While Keynes’s ideas and their further development help us understand economic fluctuations— movements in output around its long-run trend – Classical model has proven more useful in explaining the long-run trend itself
宏观经济学课件
The Classical Long-Run Model
• Economists sometimes disagree with each other • Actually much more agreement exists among economists than there appears to be • Once distinction between long-run and short-run becomes clear
shorter run • In 1936, in midst of Great Depression, British economist John Maynard Keynes offered an
explanation for economy’s poor performance – Argued that, while classical model might explain economy’s operation in long-run, long-run could be a very long time in arriving
• Polices that can help us smooth out economic fluctuations may prove harmful to growth in the longrun – While policies that promise a high rate of growth might require us to put up with more severe fluctuations in short-run
most important – Something about which economists sometimes do disagree
The Classical Long-Run Model
• Ideally, we would like our economy to do well in both long-run and short-run – Unfortunately, there is often a trade-off between these two goals • Doing better in short-run can require some sBiblioteka Baiducrifice of long-run goals, and vice versa
Macroeconomic Models: Classical Verses Keynesian
• Classical model, developed by economists in 19th and early 20th centuries, was an attempt to explain a key observation about economy – Over periods of several years or longer, economy performs rather well