如何看丁教授提出的“克鲁格曼三角只是个误传”的证据？？？

丁志杰：著作International Financial Integration出版于1990年，作者Lars Oxelheim，书中第10页用图示说明货币政策三元悖论。这个证据表明货币政策三元悖论不是克鲁格曼提出来的，克鲁格曼三角只是个误传。应@学者苗实 邀请，将有关内容扫描贴出来。

看来，考据总是对某些人有着无比的吸引力……

查了一下，这个 瑞典 的 Ox 兄，应该是比Krugman更早谈到“trinity”的人。
而且，据Ox兄自己说，
“The ‘Inconsistent Trinity’ has first been suggested by Oxelheim (1990). ”，见附件文章注释5。这里的Oxelheim (1990)就是楼主提供的那本书。
同样的附件文章注释6，Ox兄又说，
“The Inconsistent Trinity’ is further emphasised by Clarida (1999), Eichengreen, Tobin and Wyplosz (1995), Krugman (1998b), and by Obstfeld (1998). ”
这里的Krugman(1998b)是：
Krugman, P. R. (1998b).The Eternal Triangle. Mimeo, Department of Economics, MIT.
应该是这个http://web.mit.edu/krugman/www/triangle.html
根据附件文章的注释5和注释6，可以看出至少Ox兄很在意这个trinity是他第一个提出来的，而且明确告诉大家，Krugman晚的很。可以猜测，如果Ox兄听到有人说“Krugman 三角”，他会很生气。如果说“Mundell 三角”，Ox兄应该没有意见。

PS: 这个三角本来就是Mundell的，不管是Ox老弟还是Krugman老弟，都只是涂涂色，抛抛光。

Mundell就一句话：

我的，终归是我的；你涂色抛光，依旧是我的；我不认，那也是我的。

我的三角，永恒的；你们想拿去，不可能的。

此外，看到一个解释http://dictionary.sensagent.com/impossible+trinity/en-en/，这样说的：

Impossible trinity

From Wikipedia, the free encyclopedia

The Impossible Trinity (also known as the Inconsistent Trinity, Triangle of Impossibility or Unholy Trinity) is the hypothesis in international economics that it is impossible to have all three of the following at the same time:
■A fixed exchange rate
■Free capital movement
■An independent monetary policy.


The point is that you can't have it all: A country must pick two out of three. It can fix its exchange rate without emasculating its central bank, but only by maintaining controls on capital flows (like China today); it can leave capital movement free but retain monetary autonomy, but only by letting the exchange rate fluctuate (like Britain--or Canada); or it can choose to leave capital free and stabilize the currency, but only by abandoning any ability to adjust interest rates to fight inflation or recession (like Argentina today, or for that matter most of Europe).
– Paul Krugman[1]

The formal model for this hypothesis is the Mundell-Fleming model developed in the 1960s by Robert Mundell and Marcus Fleming. The triangle has its origin in the book International Financial Integration by Lars Oxelheim [2]. The idea of the impossible trinity went from theoretical curiosity to becoming the foundation of open economy macroeconomics in the 1980s, by which time capital controls had broken down in many countries, and conflicts were visible between pegged exchange rates and monetary policy autonomy. While one version of the impossible trinity is focused on the extreme case — with a perfectly fixed exchange rate and a perfectly open capital account, a country has absolutely no autonomous monetary policy — the real world has thrown up repeated examples where the capital controls are loosened, resulting in greater exchange rate rigidity and less monetary-policy autonomy.

In the modern world, given the growth of trade in goods and services, capital controls are easily evaded. In addition, capital controls introduce numerous distortions. Hence, there is virtually no important country which has an effective system of capital control[citation needed]. Under these conditions, the Impossible Trinity asserts that a country has to choose between reducing currency volatility and running a stabilising monetary policy: it cannot do both.Perfect capital mobility (different than free)

References

1.^ Paul Krugman (1999). "O Canada: A neglected nation gets its Nobel", Slate, October 19, 1999.
2.^ Lars Oxelheim, International Financial Integration (1990)

【上一次的讨论】
请见  三元悖论与克鲁格曼真的无关吗？？？

丁志杰：著作International Financial Integration出版于1990年，作者Lars Oxelheim，书中第10页用图示说明货币政策三元悖论。这个证据表明货币政策三元悖论不是克鲁格曼提出来的，克鲁格曼三角只是个误传。

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呵呵，丁教授上面提到的这本书，我没有读过，非常希望读过的朋友站出来指点一二！！！

三角关系是成立的吧？

继续看看！

一个三元悖论，被国内学者们说来说去，无不无聊啊。初、中级教科书的东西

hxhbj2007 发表于 2012-5-1 18:06
三角关系是成立的吧？

这个逻辑关系是清晰且成立的，现在讨论的问题是：三元悖论与克鲁格曼是否有关？？？

zhaojumping 发表于 2012-5-1 18:15
一个三元悖论，被国内学者们说来说去，无不无聊啊。初、中级教科书的东西

呵呵，只要有问题存在，就应该讨论，与您所说得这些没有任何关系！！！

三角悖论是蒙代尔提出的，克鲁格曼证明的！