Holding a PhD in economics from Monash University, Australia, GZ SUN now teaches economics at the University of Macau, Macao Special Administrative Region, China. His research interests are mainly microeconomics and the history of economic thought.
His joint work with collaborators helped establish the theoretical foundation of a literature on endogenous labor specialization. He has also published at times on topics in axiomatization, public choice, theory of the firm, evolutionary economics, etc., and on less-dismal-than-normal topics such as general equilibrium analysis of how large-scale societies of ants self-organize. Among the services he has provided to the scientific community of economists, the commitment he currently takes most seriously is his editorial job at a new journal, Man and the Economy, founded by the late Mr. Ronald H Coase.
His book The Division of Labor in Economics: A History provides, for the first time, a systematic and comprehensive narrative of the history of one central idea in economics, namely the division of labour, over the past two and a half millennia, with special focus on that having occurred in the most recent two and a half centuries. Quite contrary to the widely held belief, the idea has a fascinating biography, much richer than that exemplified by the pin-making story that was popularized by Adam Smith’s classical work published in 1776.
Grégoire Canlorbe: Adam Smith’s treatment of the division of labor in his magnum opus has given rise to much debate and controversy over his priority.
It has been sometimes alleged that his views were essentially plagiarism of the opening chapters of Anne Robert Jacques Turgot’s Reflections on the Formation and the Distribution of Riches, published a few years earlier. The two books show indeed remarkable similarities in content.
Other analyses consider that Smith’s thought had been anticipated in broad outline by the treatises of ancient Greek or Chinese philosophers. Kuan Chung, Hsün Tzu and Ssu-ma Ch’ien, as well as Xenophon, Plato and Aristotle among their Greek counterparts of the “Axial Period” of human civilization, had indeed already carried out sophisticated developments on increasing returns to specialization and the relation of specialization to the market mechanism.
What would you retort to these recurring claims in defense of Smith’s profound originality in the history of ideas?
Guang-Zhen Sun: Doubtless, Smith’s greatest achievement in classical economics is simply founding it, laying down a novel and powerful superstructure for what would come to be referred to as the classical political economy, into which many previously existing but otherwise scattered ideas are well weaved into a coherent body of thought and analysis. On top of that, Smith’s main priority in the intellectual history of the division of labor rests on two separable but closely related pillars of his economics: his historical jurisprudence, and his integrative analysis of the market and the division of labor. These two facets, in my view, constitute much of the core of his scholarship in economic science. This statement needs a great deal of elaboration, a task we can hardly expect to undertake in an interview, of course. But let’s take it as a good excuse to discuss a difficult topic in a conversational manner.
About the first point, so much has been done in the past four decades in the study of the history of ideas, and of political thought in particular, especially by Donald Winch, Knud Haakonssen and Istvan Hont among others, that there is perhaps no need for further discussion. My small book draws upon their brilliant work to appreciate Smith’s definitive contribution to historical jurisprudence, which indeed took shape mainly in the hands of Smith himself and a few other Scots. Nonetheless, it may be worth stressing that it is in accounting for the historical origin and the nature of the commercial society – the last developed stage of the four-staged conjectural human history – that Smith organizes the exposition of his historical jurisprudence in his magnum opus The Wealth of Nations (WN). In elaborating the historical dimension of the division of labor, Smith develops his main thesis of the origin and evolution of property rights and the function of the government, and thereby made his fundamental contribution to this branch of the study of human society. Some otherwise paradoxical ideas or statements in that great work, if and when seen from this perspective, can well be resolved and even become natural.
As far as economics is concerned, his study of the market and the division of labor is certainly far more important. As is perhaps not uncommon in the history of social thought, a high price Smith may have had to pay for the comprehensiveness and richness of his scholarship on this subject is that his theory is from time to time unduly narrowly interpreted, or misunderstood. Due to constraints of space, we may focus on two points only.
Very few economists would doubt Smith’s depth in understanding of the nature of the market. How much his scholarship on this has been influential, not only among economists but among the public as well, might be measured by the popularity of the very term “the invisible hand.” Probably because the term invisible hand may well invoke some divine providence, the market mechanism – as well as the extent of the market for that matter – is also so conceived as to claim a standing as a sort of “first mover” (proton kinoun) in Smith’s “inquiry into the nature and causes of the wealth of nations,” and particularly in his theory of how the market relates to the division of labor that sits at the heart of his whole theory. A case in point is what is named “the Smith theorem” by George Stigler in his well-known 1951 paper in Journal of Political Economy: that the division of labor is limited by the extent of the market. Nothing goes wrong with the statement per se, and indeed Smith himself uses this statement as the title of one important chapter in his masterpiece; it nonetheless fails to depict a complete picture. For the power of purchasing, in turn, largely depends upon the division of labor, and it is therefore no less meaningful to reverse the causality. Let’s quote a paragraph from Smith’s opening chapter in WN that follows immediately after articulation of the productivity advantages of the division of labor.
“It is the great multiplication of the productions of all the different arts, in consequence of the division of labour, which occasions, in a well-governed society, that universal opulence which extends itself to the lowest ranks of the people. Every workman has a great quantity of his own work to dispose of beyond what he himself has occasion for; and every other workman being exactly in the same situation, he is enabled to exchange a great quantity of his own goods for a great quantity, or, what comes to the same thing, for the price of a great quantity of theirs. He supplies them abundantly with what they have occasion for, and they accommodate him as amply with what he has occasion for, and a general plenty diffuses itself through all the ranks of the society.”
The observation by Smith upon the interdependence of the extent of the market and the division of labor was then fruitfully extended, especially by Edward Gibbon Wakefield, Alfred Marshall and Allyn Young. One section (Section 4.2) of my small book critically examines the development of this Smithian thesis by these men. It is to be noted in passing that Wakefield illustrates Smith’s two-sided theory of the market and division of labor by analogy with the roles of two legs in walking.
What makes his scholarship of the market all the more remarkable is the comprehensiveness and profundity of his understanding of the nature of the market. It is, as far as I can see, much broader than what is demonstrated by the standard price theory in modern textbooks of economics. But we shall come to this point below when talking of another matter and make more detailed discussion then.
Grégoire Canlorbe: In his 1981 international bestseller Wealth and Poverty, George Gilder is highly critical of Adam Smith for arguing that the extent of the market determines the possible range for the division of labor. In Gilder’s view, the progress of economies can indeed be measured by the extent of the system of exchange; but it is the process of increasing specialization that expands the market, not the other way around.
As “the anthropology of the potlatch” suggests, gifts and counter-gifts are the essence of economic life. “The gift evokes the desire to reciprocate and thus induces exchange.” In this regard, “it is not the market that expands the division of labor” but “it is the process of invention and specialization—the production of new goods—that expands the market.” The gift comes first.
What is your opinion on this influential criticism?
Guang-Zhen Sun: Honestly, I don’t see much inconsistency between Mr. Gilder’s supply-side argument and Adam Smith’s theory of the interdependence of the market and the division of labor. Smith assigns a central role to the power of the division of labor in production, and the criticism of the demand-oriented doctrines by the supply-side economics can be well aligned with Smith’s theory, at least as far as the parts played by the system of exchange and specialization in economic progress are concerned. We have addressed this issue above.
Grégoire Canlorbe: A crucial point advanced by Adam Smith is that the gains from the division of labor are realized most effectively and efficiently when competition is guided and constrained by a soundly functioning system of politic and economic institutions. Would you say this condition is met in contemporary China?
Guang-Zhen Sun: My short answer is: Yes and no.
Let me start with a few words on the positive side of the story. China’s economic performance in the past three and a half decades, its economic growth in particular, is dazzling. It is doubtless a significant event in human history, not least for having fundamentally changed and improved the lives of hundreds of millions of Chinese people and placed made-in-China products all over the world. Equally impressive is the vitality, vastness and complexity of its domestic market. The biggest puzzle about mainland China’s market economy is perhaps the coexistence of its highly centralized political system and the very decentralized and efficient economic system. Paradoxically, it is its unique political system that has thus far enabled China to achieve such impressive economic growth, which has largely centered on industrialization and urbanization.
[Read more…] about A conversation with Guang Zhen Sun, for Man and the Economy


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