Monday, April 1, 2013

Eulogy on Armen Alchian by Zhaofeng Xue (薛兆丰)


Remembering Armen Alchian - An Economist 
 by Zhaofeng Xue 
Institute for Law and Economics, Beijing University

因纯真而深刻——纪念经济学家阿尔钦
 薛兆丰

北京大学国家发展研究院与法学院合聘研究员
北京大学法律经济学研究中心联席主任

The original post was published on http://xuezhaofeng.com/

上周三清晨,收到阿尔钦(Armen Alchian)教授的女儿艾琳(Arline Hoel)的电邮,说老人家于美国西岸时间2013年2月19日清晨在睡梦中平静离世,享年98岁;其家人将安排活动,纪念老人家的丰盛人生。就这样,我的生活里,少了一个16年来时常挂念的人。
 
悼念文章接踵而至。中文网络上首先转发的是张五常教授多年前写的万言长文“艾智仁”(阿尔钦的张五常译法),跃然纸上的是桀骜不羁的张五常如何被功力深厚的阿尔钦降伏的故事;《简明经济学百科全书》主编汉德森(David Henderson)在《华尔街日报》发表文章,说哈耶克(F. A. Hayek)在1975年曾经说过:“有两位经济学家,其作品重要而应该获得诺奖,但因工作量不够而没有获奖,那就是科斯(Ronald Coase)和阿尔钦”;而我的老师罗利(Charles Rowley)则按捺不住激动,连发两篇短评,直斥诺奖委员会不识泰山。
 
两个月前去世的布坎南(James Buchanan)教授,也曾经在课堂上回忆,1986年他到瑞典领取诺奖时,参加一个照例由诺奖委员会主席专设的晚宴,席间照例讨论两个话题,一是当年获奖的主题,二是来年获奖的人选,而那晚他们讨论的就是科斯和阿尔钦。布坎南当时想,阿尔钦的贡献在产权理论,科斯在交易费用,两人分享诺奖,是完美搭配。结果,科斯在五年后获奖,阿尔钦则擦身而过。布坎南郑重其事地向同学们解释,以他的猜测,问题出在阿尔钦总是宣称他多么喜欢高尔夫上——生性刻板的瑞典人无法理解这种美式自嘲,见他玩心太重,便没有颁奖。

这成了一个现象:为了表达对阿尔钦的敬意,师友们要么连年祝愿他获奖,要么编造他落选的琐碎理由。不了解阿尔钦的读者不禁要问:这究竟是位怎样的学者?以我的亲身感受,他是一位用机智幽默来制造快乐的朋友,用优雅素养来包裹尖锐批评的智者,用日常语言来消除学术神秘的教师,和用纯真发问来重塑经济学根基的天才。
 
阿尔钦是亚美尼亚人后裔,1914年4月12日生于美国加州。他在和睦相处、守望相助的族群中长大。他考取了斯坦福大学,但由于奖学金不足,只好退回学费低廉的州立大学就读。那次他哭了。两年后,他回到斯坦福大学,并在1942年完成博士论文。据另一位诺奖得主阿罗(Kenneth Arrow)回忆,他到斯坦福大学入学时,阿尔钦已经毕业离开,但新生们仍然视阿尔钦为系里机敏过人的传奇人物。

二战结束后,阿尔钦成为兰德公司首位常驻经济学家,并初次显露了经济学的威力。当时在兰德公司里,人们正在猜测氢弹的原料究竟是什么。阿尔钦找人查阅了五种稀有金属制造商的股票价格,发现只有一家公司的股价,在短短4个月内,从2美元飙到了13美元。阿尔钦即写了一篇题为“股市露天机(The Stock Market Speaks)”的文章,在兰德公司内部流传,但两天后即被上级没收;而两个月后氢弹试爆,他的猜测得到印证,那家公司的股价也站稳了。

首次为阿尔钦带来国际声誉、并为经济学科学找到了稳固的落脚点的、是在他1950年发表的“不确定性、进化和经济理论(Uncertainty, Evolution, and Economic Theory)”一文。该文的背景很简单:当时有两位大经济学家(Richard Lester和Fritz Machlup)在争论,企业家究竟有没有在计算边际成本和边际收益。阿尔钦回答:计算与否不重要,重要的是背后主宰企业家存活的客观规律;由于存在不确定性,所以人们在逻辑上不可能求得最大化;人们只是在争取存活;即使(或虽然)人人都是傻瓜,物竞天择的规律也仍然时刻在发挥作用。

阿尔钦推翻了学界对“成本”的成见。在兰德公司考察飞机制造的成本和产出过程中,阿尔钦敏锐地发现,厂商在作出投资决定时,对长期生产总量——而非单位时间内的生产率——的估算是举足轻重的。在此基础上,他写成了一篇重要——重要得会改变微观经济学对厂商生产成本的知识基础——的论文“成本与产出(Costs and Outputs)”。这篇文章被美国顶级学报《美国经济评论(AER)》接受。但此时,他的学友要为其老师海利(Bernard Haley)出一本纪念文集。阿尔钦竟然大方地婉拒了顶级学报,把这篇重要的文章放到了罕有人留意的纪念文集里。在学术影响和尊师重道之间,阿尔钦选择了后者。

阿尔钦还澄清了“歧视”的意义。他和卡索尔(Reuben Kessel)在1965发表“竞争、垄断和对金钱的追求(Competition, Monopoly, and the Pursuit of Money)”一文,揭示了这样的含义:选择意味着歧视,歧视意味着选择,选择和歧视是一枚硬币的两面;一个“认钱”的社会,会增加具有不同个性特征的人之间的平等;而一个“认人”的社会,基于个性特征(如肤色、性别、信仰、行政级别等)的歧视就势必更加严重。因此,恰恰是竞争激烈的市场经济,或鼓励追求金钱的资本主义,才使得那些不受欢迎的人——性格怪诞、笃信异教、坚持己见、或有各种污点和前科的人——更容易生存下来,而这才增进了自由。

阿尔钦对“产权”概念的阐释,至今没有人能超越。权威的《新帕尔格雷夫经济学词典》中的“产权”条目,就由他老人家执笔,经多次再版后也依旧保留。阿尔钦解释的不仅是私有产权,而是多种产权。最精彩的,是他以一条曲线将人类各种典型所有制串起来的解说。听过或读过的人没有不拍案叫绝的。由此生发,阿尔钦关于“言论自由并不意味着可以侵犯产权”的观点,至今仍然是美国大多数位高权重的法官的知识盲点。

阿尔钦对企业的解释远胜科斯。阿尔钦和徳姆塞茨(Harold Demsetz)在1972年对企业性质所在的解释(“生产、信息成本和经济组织(Production, Information Costs and Economic Organization)”),是对科斯1934年的著名论文“企业的性质(The Nature of the Firm)”的正面否定。科斯说,企业之所以形成,是为了节省交易费用;而阿尔钦和徳姆塞茨却说,经济组织的美妙之处,正如男女结合可以产子,并非简单的节省交易费用,而是可以无中生有。阿尔钦曾经对我说过,因为科斯是他的朋友,他不替这个观点做广告,但孰优孰次,细心的读者一望而知。

阿尔钦阐发了“人际依赖”的深义,勾勒了企业治理和财务安排的规律。例如,既然专业分工能够提高生产效率,那为什么报社需要拥有自己的印刷厂、石油公司要有自己的运输船队?阿尔钦与克莱恩(Benjamin Klein)和克洛佛(Robert Crawford)的论文“垂直整合、可划拨租和竞争性的缔约过程(Vertical Integration, Appropriable Rents, and the Competitive Contracting Process)”一文作了解释,并回答了企业内部“什么人来当老板”的一般性问题。又例如,炼钢厂可以大规模举债,并聘用专业人士来经营,而制药厂却往往只靠自有资金,并由所有者亲自经营。这是为什么?他与伍德华德(Susan Woodward)在1988年合写的论文“企业已死:企业万岁(The Firm is Dead: Long Live the Firm)”解释了这个现象。

重要的是,由此看去,人世间的诸多合约安排和社会建制,便不再是随机选择或历史偶然,而是符合经济规律的竞争结果。阿尔钦和其他学者,共同催生了“产业组织”这门经济学分支,它剖析了企业的内部结构,为反垄断法的实施打开了一扇窗户。正因如此,阿尔钦也被公认为上个世纪五十年代兴起的法律经济学运动的重要贡献者之一。

阿尔钦改写了“失业”的概念。他不认同货币大师弗里德曼(Milton Friedman)对“失业”的解释,并得到弗里德曼夫人(Rose Friedman)的支持。他在1969年发表“信息成本,定价与资源闲置(Information Costs, Pricing and Resource Unemployment)”一文,确立了“失业都是在适度控制信息成本条件下的自愿的选择”的思想,令汗牛充栋的以“非自愿失业”为出发点的宏观经济研究,顷刻间变成了沙堆上的城堡。

阿尔钦非常重视教学,是一位伟大的教师。他女儿艾琳清楚记得,阿尔钦曾经利用当时刚刚面世的录音机,揣摩自己上课的语速和效果。我的老师威廉斯(Walter Williams)和她是读博士时的同班同学,一起上阿尔钦的课,一起组织学习小组。当年,威廉斯是个不懂经济学、要用最低工资法来帮穷人的青年。阿尔钦回到家里说:“我要是改变了他,我就能赢得全世界。”今天,威廉斯教授是美国著名的辛迪加专栏作家,一篇篇文章改变了无数读者看世界的角度。

不得不提的是,阿尔钦和艾伦(William Allen)写的《大学经济学(University Economics)》(多年来,其中有些版本改名为《普适经济学(Universal Economics)》或《交易与生产(Exchange & Production)》。我另一位老师里维(David Levy)回忆:芝加哥大学博士考试,是在一堆公开的题库里挑选出来的,老师并不介意学生事前已经知道题目,因为那些是连老师自己都没有标准答案的题目;至于参考书,就包括了《大学经济学》的习题集,它能训练学生“像经济学家”那样思考。到晚年,阿尔钦除了打高尔夫,就以修订这部著作为业,留精华,去糟粕,加了减,减了加,草稿在四十多章到六十多章之间波动。

上周日(24日)《洛杉矶时报》刊登长篇讣文,对阿尔钦的生平和贡献做了恰如其分的述评。事实上,他的学术贡献涉及进化、产权、成本、依赖关系、产业组织、乃至失业和通货膨胀,遍布微观经济学、宏观经济学乃至行为经济学,文集达厚厚两大卷。哈耶克说他工作量不足,显然不实。特别地,该文用了长达五分之一的篇幅,介绍了阿尔钦的《大学经济学》课本本身,和他长期亲身给法学教授和联邦法官授课,对法律经济学运动,对美国的判例,所产生的深远影响。

话说1997年,互联网刚刚兴起,我学着制作个人网站,想把心目中的学术英雄摆到网上。寻遍网络,找不到阿尔钦的照片,而只有他的电邮地址。我去信索取,他很快就把照片寄来。我回信致谢:“我一收到你的信,就给女朋友打电话分享惊喜了;礼尚往来,附上我的照片。” 阿尔钦回复:“谢谢!寄你女朋友的照片来更好。”

在他的鼓励下,我逐章译完了他尚在改写的《大学经济学》的文稿。有几年,我常常在晚上睡觉前给他去信,求教一些文稿细节的问题,而次日醒来,就已经收到地球另一端的回答或新稿。以这种方式求学,真是奇妙而珍贵。遗憾的是,此书因各种细节一拖再拖,至今未能付梓,而中译出版也只得顺延。尽管如是,凡修过我的“经济学原理”或“法律经济学”的同学都知道,阿尔钦的思想贯穿课程的始末。

与阿尔钦见的最后一面,是在2007年八月末,我到他家拜访。告辞时,93岁高龄的老人家显然已经累了。我劝他留步,他坚持要送:“我得确认你走了。”幽默不改,众人大笑。汽车缓缓加速,我回头望去,加州的落日余晖洒在他脸上,他依然站在那里,徐徐挥舞着双臂……

Tuesday, March 26, 2013

Eulogy on Armen Alchian by Steven N.S. Cheung (張五常)

Armen Alchian, My Friend, My Mentor
by
Steven N.S. Cheung
February 21, 2013

Armen Albert Alchian (1914-2013) passed away last February 19.  That evening, I was putting final touches to an article explaining Alchian’s contributions (and those of Harold Demsetz) to the theory of  economic organization.  In the last paragraph I wrote: "Alchian, at the age of 98, is still around."  Just hours later, emails came in from all over telling me that he was gone.  What an unhappy coincidence!


Six years ago, Armen began suffering from brain degeneration, so much so that he stopped responding to communications from me and my wife Linda.  A few months before that, Yoram Barzel told me that Armen’s memory had deteriorated.  Since that time, we (and other friends of Armen) knew that the day of farewell is nigh.  My son Ronald, who is in medical research, said: "Dad, Alchian is a very old man, and there are many possible reasons for such a condition in the aged like him."

During the past several years, increasing numbers of friends and colleagues have forwarded to me Internet articles and pages which contain glowing appreciations of Alchian's scientific contributions.  "Why hasn't Armen Alchian won the Nobel Prize in Economics?" "The greatest economist in the world!"  "The most outstanding price theorist ever lived!"  People closer to Alchian tend to hold him in higher regard.  In the early part of the 1970s, John McGee and I hailed Alchian as the best economic scholar on earth.  Yoram Barzel, another colleague at the University of Washington who was then not acquainted with Alchian, was bemused by our bold assertion.  But after getting to know Armen, Yoram concurred that he deserved the accolade.

Alchian never engaged in self-promotion, and he never cared about journal rankings.  Kenneth Arrow, Armen’s former colleague at RAND, told a story about the classic paper "Costs and Outputs," which was written by Alchian in 1957 and accepted for publication in the American Economic Review.  Now AER was (and is) one of the profession’s leading journals.  However, when invited to contribute to a Festschrift in honor of Bernard F. Haley, Alchian decided to withdraw this piece from the AER and to publish it in the volume instead.  Who else would do something like this?  I know I can't.  But under Armen's influence, I have at least learned to ignore the ranking of journals and submit my papers to editors on friendly terms.

Refusal to fame-seeking has a cost.  A quarter of a century ago Alchian was not as well-known in Europe as his contributions merited.  In 1985, the editors of New Palgrave Dictionary of Economics invited me to contribute four entries to its new edition---viz., "common property rights," "economic organization and transaction costs," "Ronald Coase," and "Armen Alchian."  The Dictionary only published entries of reputable economists above the age of sixty, and strict word limits were imposed – a few thousand words for "Coase," but a mere few hundred for "Alchian."  How could I possibly summarize Alchian's contributions within such an exiguous word count?  When I apologized to Armen for my inadequate coverage in the Dictionary, typically he just smiled and said, "That's not important."

To write about "Armen Alchian," I can flow endlessly like the Yangtze River. This I have done, in numerous Chinese articles.  In choosing to express my thoughts in Chinese rather than English I was hoping that the life, times and works of a great master would enhance the interest of economics among my own countrymen.  I am sure the name of A.A. Alchian will live long and famously in the annals of Chinese economics.

I started attending Alchian's UCLA lectures in 1963, and became what the Chinese would say as a student inside his chamber two years later.  My doctoral dissertation, The Theory of Share Tenancy, was written under the co-supervision of Armen Alchian and Jack Hirshleifer.  Having expressed my gratitude for Alchian's teaching (including private lessons on how to write better English) in previous articles, I will not repeat these things here.  However, I must declare once again that Alchian taught me to be scrupulous about research, to use economic theories to explain real-world observations, and to adhere strictly to the principles of the seeker after truth.

True scholars – individuals who are genuinely interested in analysis and thinking and to know the causes of things – are rare in the economics profession.  Lucky is me, to have met a number of true scholars besides Armen Alchian.  But Armen is the only individual who persistently maintained the unadorned and scientifically-driven curiosity of a genius-child.

One time Armen returned from a trip to Japan, and summoned me to his office.  I first thought that he was going to give me some important advice.  It turned out that he wanted to show me a gift that he brought back from Japan.  What was it?  It was a little paper box with nothing inside.  What was so special about this box?  It was  wrapped in a single piece of paper, similar to those wrappings that we commonly see in the street markets in Hong Kong.  Obviously Armen had never seen something like that before.  He said, "Asian people are so smart.  Why couldn't we think of using a piece of paper to wrap things in such a simple way?"

I was born and raised in Sai Wan Ho in Hong Kong.  As a young man, I was given to wandering around the area, learning about countless trivial things.  Every time I talked to Armen about this street-wise "knowledge" he would be so intrigued and would start asking all kinds of interesting questions.  I once described to him the process of bilateral bargaining in a fiercely competitive market.  We had several exchanges about the economics behind such behavior, but could not come up with a satisfactory explanation.  I finally found the answer some twelve years ago, but unfortunately did not have the opportunity to explain it to Armen.  I never had the opportunity to tell him my explanations for tie-in sales and full-line forcing either.  Had he known about my discoveries, he would no doubt be excited and relentlessly cross-examine my answers.

When Alchian was thinking about retirement in 1976, his friends organized a Conference in his honor.  Given the large number of Alchian admirers, this happened to be just the first of at least four similar events.  In the first Conference I presented the paper, "Why are Better Seats Underpriced?"--- it was an attempt to overturn the explanation Alchian gave in 1964 on why premium seats in Rose Bowl games were underpriced.  After reading my piece, Armen did not say anything.  Thirty years later I sent him a collected volume of my English articles, in which I included the underpricing analysis.  In his reply he praised that article --- and that article only!

The scientifically-driven curiosity of Alchian has permanently influenced my attitude towards research.  In my doctoral thesis, I observed that the early stage of the land reform in Taiwan saw a rapid surge in the production of a plant named citronella, and provided a clear explanation for this fact based on my theory of share tenancy.  Alchian became seriously interested in the plant itself, and insisted that I study details of its cultivation methods as well.

To do research, to know the causes of things, we cannot ignore details.  Ever since my first day as an economist, I have never put much weight on statistical data (from whatever source) and on regression analysis.  But I have always emphasized facts in detail.  Without the nitty-gritty, economics would tend to become colorless and boring: and research on uninteresting problems is not terribly meaningful.  It was from Alchian, the eternally curious genius-child who was so fond of asking fundamental questions, that I learned to pay close and serious attention to facts in detail.

When it comes to personalities, Alchian and I are dramatically different.  He was a modest gentleman.  As Ronald Coase wrote, "Alchian is classical in manners as well as in thought."  No one would ever describe me that way.  I may not be a good imitator of Alchian’s grace and polish, but I have managed to follow his integrity as a scholar.  As academics, our job is to explain the world, and perhaps (sometimes) to make policy recommendations.  Anything else is beyond our ambit.  This is the line drawn by Alchian, and one who crosses it can no longer be deemed to be a genuine scholar.  As a Chinese who is deeply concerned about China’s future, I have written extensively on economic reforms in China.  Although I may lash out now and then at the state of the world, I have never transgressed the boundary Alchian drew on the ground.  In discussing my views about transaction costs and the delineation of rights to the Chinese people, I have often alluded to the influence of Ronald Coase.  But in terms of the scientific methodology, the close scrutiny of facts and details and scholarly integrity, I learned it all from Armen Alchian.

Back in the old days at UCLA, it was not easy for graduate students to discuss research ideas with Alchian in person.  Most students harbored the impression that he was aloof and not very approachable.  I shared the same view initially, but discovered the contrary later.  The following is a true story.

In early 1967, after finishing the first lengthy chapter of my thesis, I received news from Hong Kong that my elder brother (who was a year older) had passed away.  Understanding that my mother must be shattered by the death of her favorite son, I thought about giving up at UCLA and returning to Hong Kong to be near her.  At that time I was already an assistant professor at the California State University at Long Beach.  I drove back to LA to tell Jack Hirshleifer the sad news and my intention to quit.  Hirshleifer thought that it would be a pity to abandon my dissertation, on which I had already made very good progress.  He then said he would discuss with other members of my thesis committee the possibility of granting me a PhD on the strength of the first long chapter alone.

That afternoon I went to see Alchian, planning to tell him what I told Hirshleifer.  Alchian obviously knew what I had in mind.  But before I had a chance to say anything, he said, "Don't tell me anything about your personal matters."  So I left without a word.  One day later in Long Beach, I received a letter from Alchian with a $500 check enclosed and simply two lines: "You can buy candies with this $500 or you can hire a typist to help you finish your dissertation as quickly as possible."  This $500 was equivalent to my one month’s gross salary, so it was not a small amount.  What other alternatives did I have?  In less than two months I wrapped up my dissertation.  Alchian said it was a miracle.  In retrospect, I regret cashing that check and spending that $500.  If I had kept the check, I could now show it to my children, grandchildren, and students while telling them this proud story.  I know Armen would say, “Steve, put that check up for auction and see how much it would fare now.”

I spoke to Armen's wife and daughter on the phone this morning.  They said, "He has gone to a better place." 

(This eulogy was written in Chinese on February 21, 2013, published in the Hong Kong Economic Journal and several blogs in China on Feb. 26, 2013, and translated into English by the collaboration of Fred K. Luk, Kam-Ming Wan, Chi-Wa Yuen, and Michael T. Cheung.)



The chinese version of this article can be found:
http://blog.sina.com.cn/s/blog_47841af70102e1yi.html



Sunday, March 3, 2013

Remembering Armen Alchian


The Economics profession has lost a giant today. Professor Armen Alchian passed away peacefully in his sleep at his home in Los Angeles on February 19, 2013. He was 98 years old.

Armen Alchian was influential in many areas of economics including Law and Economics, Industrial Organization, and Macroeconomics. He dedicated his entire academic life and service to the Department of Economics at UCLA, starting in 1946. Like Ronald Coase (Nobel laureate in Economics in 1991), Armen Alchian was not a prolific writer. His articles, however, were both deeply insightful and highly influential. For example, his article on “Uncertainty, Evolution, and Economic Theory” is still widely cited today - more than 60 years after its original publication in 1950. Similarly, his paper (coauthored with Harold Demsetz) on “Production, Information Costs, and Economic Organization” was selected as one of the top 20 articles in the past century published in the American Economic Review, a leading journal for the profession.

His contributions in Economics have been extensively written about and deeply appreciated among first-rate economists. For example, James Buchanan (Nobel laureate in Economics in 1986) regarded Armen Alchian as the best blackboard economist that he has ever known; Kenneth Arrow (Nobel laureate in Economics in 1972) and Oliver Williamson (Nobel laureate in Economics in 2009) consider Alchian an icon in the profession; and Ronald Coase (Nobel laureate in Economics in 1991) regards him as the best modern economist to use the most fundamental economic forces to explain a wide variety of apparently completely different problems. For a more detailed description of his contributions in Economics, please visit the memoriam page of UCLA Department of Economics at http://www.econ.ucla.edu/news/alchian/.

Although his work was highly influential and many people in the profession believe that he deserved to win the Nobel Prize in Economics, this recognition never came to him. Frederick Hayek (Nobel laureate in Economics in 1974) once claimed that “There are two economists who deserve the Nobel prize because their work is important but won't get it because they didn't do a lot of work: Ronald Coase and Armen Alchian”. Ironically, Frederick Hayek was half wrong as Ronald Coase won the Nobel Prize in Economics in 1991.

Nevertheless, his influences on teaching and learning, albeit important, were less extensively discussed. This article attempts to fill this void. For nearly half a century, Professor Alchian’s influence was felt strongly among students at UCLA. In fact, he was a legend to generations of graduate students there. Armen Alchian trained an “army” of highly successful students including academic scholars in top universities around the globe, judges, and policymakers. One of his best known students is William F. Sharpe, who received the Nobel Prize in Economics in 1990 for his work on finance. William Sharpe describes Professor Alchian’s teaching as follows: “Armen Alchian was my role model at UCLA. He taught his students to question everything; to always begin an analysis with first principles; to concentrate on essential elements and abstract from secondary ones; and to play devil’s advocate with one’s own ideas.”

To Armen Alchian, learning was never unidirectional but a two-way process in which teachers and students learn from each other. More importantly, he always put learning first. His motto was: “what students learn and learn well is what counts and not what you (the teacher) explain to them about what you know”. Therefore, Professor Alchian rarely “explained” any economic concepts in the classroom. Instead, he used a Socratic approach to let students actively participate in the discussion and learn from each other.

This teaching approach has two advantages. First, it stimulates students’ thinking and fosters creativity. Professor Alchian prepared mysterious questions (or riddles) and challenged students to explain them. For example, when he taught the concept of price discrimination, he did not start with an outright definition. Instead, he asked students why automakers in Korea were selling their cars in the U.S. at a lower price than in Korea despite transportation costs. This method encouraged students to learn the underlying economic principles and know how to apply them in a real world setting. It also forced students to explore other possible ways to explain the same phenomenon. This sort of creative thinking is essential in economics because in the real world facts can often be consistent with more than one underlying theory.

Second, this teaching approach provides opportunities for students to have their misconceptions corrected. Many students who have prior training in Economics believe that they understand Economics. However, when you ask them seemingly basic concepts, they often stumble. For example, what is opportunity cost? If you play tennis and suffer from a sore elbow afterward, does the cost of playing tennis include the resulting sore elbow? What is the law of demand? Investors sometimes employ momentum trading strategy and buy stocks when prices are on the rise. Is this behavior a violation of the first law of demand? Alternatively, can the demand curve be upward sloping?

Professor Alchian emphasized the importance of expressing your ideas to others. In the classroom, he would ask students to explain passages or examples in the textbook. His philosophy was “if you cannot express it clearly, you don’t know it”. For those who were brave enough to try, he would reward students with extra credits (a better grade) for not just learning the concepts but also demonstrating the ability to articulate them correctly. To him, learning began in the classroom, but it did not stop there. Indeed, Professor Alchian would occasionally call up employers of his former students to inquire if his students had expressed certain concepts (that they learnt in the classroom) to their bosses.

His teaching style was similar to that of his writing. Professor Alchian included only the most essential concepts or materials in his class and always abstracted from the tangential ones. It is with great sadness that Economics has lost a Master today. Armen Alchian has left a rich legacy as an economist and a teacher. Not only did he develop many beautiful yet basic economic concepts, he enriched many lives. He will be sorely missed.

悼念一位大師─阿爾欽  


世界經濟學界痛失一位巨匠。 2013 年2月19日,阿爾欽(Armen Alchian)教授【附圖】在洛杉磯家中於睡夢中安然離世,享年98 歲。眾所周知,阿爾欽教授在涉及產權經濟學、產業組織及宏觀經濟學等眾多經濟領域極富影響力;自1946 年,他將畢生精力奉獻給加州大學洛杉磯分校(UCLA)的教學研究工作。

正如Ronald Coase(1991 年諾貝爾經濟學獲獎者)一樣,阿爾欽不是一位多產作家;然而,他的著作充滿洞察力,並對經濟學界產生重大影響,他於上世紀50 年代發表的著名論文《不確定性、演化與經濟理論》在今天仍被廣泛引用;此外,他與Harold Demsetz 共同寫就的《生產、資訊費用和經濟組織》,被世界經濟學頂級期刊《美國經濟評論》選為「100年來最具影響力的20篇論文」。

教師學生互相學習

阿 爾欽對經濟學的貢獻被眾多世界一流的經濟學家廣泛傳頌。James Buchanan (1986 年諾貝爾經濟學獲獎者)認為,阿爾欽是他所結識的最出色理論型經濟學家,Kenneth Arrow(1972 年諾貝爾經濟學獲獎者)與Oliver Williamson(2009 年諾貝爾經濟學獲獎者)視阿爾欽為學界的一個標誌;Ronald Coase 稱頌阿爾欽是最出色的現代經濟學家。阿爾欽擅長以最基本的經濟學理論解釋眾多領域的問題。如欲瞭解更多阿爾欽在經濟學領域的貢獻,可瀏覽UCLA 紀念主頁(http://www.econ.ucla.edu/news/alchian/ )。

儘管阿爾欽在學界影響深遠,並且很多學者 認為他有實力獲得諾貝爾獎,但是他最終沒能獲得這一殊榮。Frederick Hayek(1974 年諾貝爾經濟學獲獎者)曾表示, 「我認為有兩位經濟學家,憑藉他們的傑出工作,理應獲得諾貝爾獎,但是由於他們的實際工作量較小而沒有得獎,他們是Ronald Coase(按其後在1991獲獎)與阿爾欽。」阿爾欽儘管對學術教育影響深遠,卻很少被人提及,希望本文能盡力填補這一空白。

近半個世 紀,阿爾欽在UCLA 的學生中極具影響力。事實上,對於一代又一代UCLA 學生來說,他是一個傳奇。阿爾欽培養了一批頗有建樹的學生,包括眾多世界著名大學的頂級學者、法官及政策機構的高級官員,其中一個是William F. Sharpe ─在1990 年,他被授予諾貝爾經濟學獎,以表彰其在金融經濟學方面的傑出貢獻。William Sharpe 這樣評論阿爾欽的教學: 「阿爾欽是我在UCLA 時的榜樣。

他教導學生學會質疑,從基礎理論入手進行分析,關注要素並去繁就簡,勇於挑戰 自己的固有想法。」對於阿爾欽,學習從來都不是單向的知識傳授,它是一個雙向過程,教師與學生互相學習;更重要的是,在教學中,阿爾欽始終把學習放在首 位,他的座右銘就是「重要的是學生學到了什麼,而不是你(教師)傳授了多少知識」;因此,阿爾欽在課堂上很少直接介紹經濟學概念。他用類似於蘇格拉底的教 學方式來啟發學生,鼓勵他們積極參與討論並互相學習。

強調要表達自我觀點

這種教學方式有兩方面優點。首先,它 鼓勵學生思考並培養學生的創造力。阿爾欽準備了許多玄妙的問題(或謎題),並要求學生們解答。例如,當講解價格歧視理論(price discrimination)時,阿爾欽不會直接提出定義,反之,他會詢問學生: 「儘管需要承擔高昂的運輸費用,為什麼韓國汽車製造商仍然會以低於本國市場的價格在美國銷售其汽車?」這種教學方式鼓勵學生掌握現象背後的經濟理論,並知 道如何在實際生活中應用。它也促使學生努力探索社會現象的其他可能解釋。這一點非常重要,因為現實中同一個現象可以從很多角度去詮釋。

第二 點,阿爾欽的教學方式讓學生有機會糾正自己的誤解。許多曾經學習過經濟學的學生認為,他們已掌握這一學科;然而,他們有可能被一些看似基礎的概念絆倒,例 如,什麼是機會成本?如果你打網球之後感到手臂酸痛,打網球這一行為的機會成本包括手臂酸痛這一結果嗎?什麼是需求定律?根據動量交易策略,投資者購買價 格上漲的股票,此現象違反需求定律嗎?或者,需求曲線有可能顯示為向上傾斜嗎?

阿爾欽強調向他人表達自我觀點的重要性。在課堂上,他會要求學生解釋書本上的段落或事例。他的理念是, 「如果你不能清楚地表達某件事,說明你還沒有真正理解它」。對於那些勇於嘗試的學生,他以學分(或更好的成績)來獎勵他們不斷學習,以及能準確表達自己觀點的能力。

對他而言,學習起源於課堂,但並不結束於此。為了達到這一目的,阿爾欽不時聯絡自己學生的現任僱主們,瞭解他的學生是否曾向上司表述過特定的(他們曾在課堂中學到的)概念。

他的教學風格與寫作風格類似。在課堂上,阿爾欽只講解最重要的概念及內容。他的演講簡明扼要,卻直探根本。

今天,我們為經濟學界失去一位大師感到萬分悲痛。作為一位經濟學家和教授,阿爾欽為我們留下了豐富的遺產,他提出了許多耀眼卻基礎性的經濟學概念,並影響了眾多學者。

更重要的是,其言傳身教,極大的影響及富豐了一眾學生的生命。

在此,我們沉痛悼念並永遠懷念授業恩師阿爾欽!

作者為香港理工大學會計及金融學院助理教授

尹錦銘

[The author is very grateful to Mike Akemann, Arline Alchian Hoel, (Ginger) Zhe Jin, Shijun Liu, Fred Luk, Philip Tzang for their insightful comments.  Thanks also to Xinran Li and Y.K. Fu for their translation and editorial services.  The Chinese version of this article was published in the Hong Kong Economic Journal (信報) on 2/27/2013]

Below include other articles on remembering Armen Alchian (update frequently):

UCLA Dept. of Economics (including Harold Demsetz, David Levine, and John Riley):
http://www.econ.ucla.edu/news/alchian/

Stanford University Dept. of Economics:
http://economics.stanford.edu/news/esteemed-economist-armen-alchian-died-today-february-19-2013

Los Angeles Times:
http://www.legacy.com/obituaries/latimes/obituary.aspx?page=lifestory&pid=163245781#fbLoggedOut

David Henderson (Hoover Institute, Stanford University):
http://econlog.econlib.org/archives/2013/02/armen_alchians.html

Tom Hubbard (Kellog School of Management, Northwestern University):
http://www.digitopoly.org/2013/02/20/a-legend-in-economics-passes/

Robert Higgs (Senior Fellow, the Independent Institute):
http://bastiat.mises.org/2013/02/armen-alchian-april-12-1914-february-19-2013/



Daniel Benjamin (Senior Fellow, Property and Environment Research Center):
http://perc.org/blog/memoriam-armen-alchian-1914-2013

Peter J. Boettke (George Mason University):
http://www.coordinationproblem.org/2013/02/economic-forces-at-work-armen-alchian-1914-2013.html

David Glasner (Economist, Federal Trade Commission):
http://uneasymoney.com/2013/02/25/armen-alchian-the-economists-economist/

Charles Rowley (President and General Director, The Locke Institute):

http://charlesrowley.com/2013/02/20/armen-alchian-1914-2013-great-economist-denied-an-earned-nobel-prize/

In Chinese:

Steven N.S. Cheung ( 张五常):
http://blog.sina.com.cn/s/blog_47841af70102e1yi.html

In Audio:


Don Boudreaux (Cato Institute):
http://www.cato.org/multimedia/daily-podcast/remembering-armen-alchian