Scope and flexibility of alternative economic paradigms

Teaching the basics of the surplus approach this week. One important feature of what Garegnani refers to as the core of the surplus approach, shown in the figure below, is the flexibility that it provides for the development of alternative theories.

In the core output, technology and real wages are taken as data of the system. With output and technology one can determine the labor requirements for production. Further, with real wages one can get the necessary consumption needed to reproduce the labor force. Finally, extracting necessary consumption from output one obtains the surplus, and the surplus is what allows for expanded reproduction or accumulation, the main preoccupation of classical political economy authors.

An important thing to emphasize is that the relations within the core do not imply that the theories regarding the data must be similar. For example, while Ricardo accepted Say's Law, Marx clearly rejected it. Hence, the core is compatible with alternative theories of output, and similarly about the determination of real wages and technological change. The core is flexible and capable of encompassing different theories.

Further, nothing precludes the existence of feedback mechanisms and relations between the data of the system in classical analysis. The level of surplus might certainly have a relation to output, and that is central for the theories of accumulation, but those relations lack the generality that is attributed to the core relations. In those, less rigid relations, the role of institutional and historical elements loom large.

In the marginalist approach, in contrast, output and distributive variables (the real wage and profits, which are part of the surplus and, thus, residual for surplus authors) are determined simultaneously by supply and demand. There is no space for alternative views on the determination of output or the real wage. Full employment (a version of Say's Law) is a necessary result with flexible prices (hence, rigidities are necessary to get unemployment).

Suggested Reading:

Garegnani, P. (1984), “Value and Distribution in the Classical Economists and Marx,” Oxford Economic Papers, 36, pp. 291-325. Link here (subscription required).

PS: A complementary post, diagram and suggested reading at Robert Vienneau's Thoughts on Economics.

Rethinking Trade and Commercial Policy at the University of Utah

Peter Ho, from the University of Denver, gave a nice and stimulating talk based on his recently published book. He tries to rethink classical political economics views on trade, reviewing the contributions of Smith, Ricardo and Stuart Mill, and the trade policy advise that derives from it. Without having read the book, the presentation suggests a sort of institutionalist approach to the critique of the mainstream.

One thing that did strike me out as peculiar to the presentation, but which may not be reflected in the book, was the critique of the mainstream view of trade on the basis of Ricardo/Mill rather than the Heckscher-Ohlin (HO) model. Note that comparative advantage in the HO story is associated to full utilization of resources and relative prices determined by scarcity (for a critique see here). That's clearly not the case in Ricardo.

Also, the Ricardian (properly understood as part of the surplus approach) story is less about the benefits of trade in general, and more about which social class benefits and which one loses from protection (see my discussion here).

One last point about the talk, that I would have liked to discuss with Peter (I had to leave for a defense) was on Mill. He was a peculiar author in-between classical political economy and marginalism, and his contributions are more problematic to properly understand than authors like Ricardo and Marshall. In fact, Mill is a key author to understand the break between the surplus approach and marginalism. As noted by Krishna Bharadwaj, what was Ricardian in Mill's theories does not appear in Marshall's work, and what is proto-Marshallian in Mill's ideas was not part of Ricardo's views of political economy. In that sense, while I'm comfortable with a Smith/Ricardo approach to trade, I'm less keen about adding Stuart Mill to the mix.

PS: I should have noted that his discussion of trade policy builds on Hamilton, List, Prebisch, Myrdal, Singer and others, like the work of Ha Joon-Chang. A paper of mine on a similar subject is the entry on Export Promotion for the International Encyclopedia of the Social Sciences, edited by Sandy Darity (here).

Giving thanks for David Ricardo

Off to New York, where I'll be interviewed about David Ricardo's contributions to economics, for a documentary on capitalism. So here is a recent post by Robert Paul Wolff, an incredibly wise Marxist philosopher, on Ricardo (his book on Marx is quite Sraffian, by the way). Enjoy the Thanksgivings!

The political economy of flat taxes

The GOP has revived this season the ghost of the flat tax. Cain is for the 999 plan (whatever that is) and Perry for a 20% flat income tax (see here, for example). I haven't seen any particular analysis of the Perry plan so far, but it won't be much different from the Cain breakup. For example, the Tax Policy Center (here) shows that Cain's plan would increase the federal taxes of the lowest quintile by 18.3% while reducing that of the top 0.1% by 17.9%.  And that's not class warfare! You don't need to be a rocket scientist to know that when you hear flat tax it's all about reducing the taxes of the rich.

Taxation was, by the way, always a key concern of classical political economy (it's there in the title of Mr. Ricardo's Principles). One of the most famous tax proposals of the 19th century, Henry George's single land tax, was in fact based on the 'Ricardian' theory of the rent. That is, the idea that landowners derive their income (rent) from ownership, and that their income (for a given level of output) detracts from profits and the possibilities of accumulation, required a tax to transfer income against wealthy landowners.

The interesting thing is that since the old classical surplus approach makes it clear that class conflict is essential for understanding the functioning of the economy, it does not try to disguise the issue of taxation as not having distributive consequences.