The Emergence of Oligopoly

Originally published in 1969. In describing the emergence of oligopoly, Professor Eichner has written a history of the American sugar refining industry, one based in part on records of the United States Department of Justice. Sugar refining was one of the first major industries to be consolidated, and its expertise was in many ways typical of the development of other industries. Eichner's focus is on the changing pattern of industrial organization. This study is based on a unique four-stage model of the process by which the industrial structure of the American economy has evolved. The first part of the book traces the early history of the sugar refining industry and argues that the classical model of a competitive industry is inherently unstable once large fixed investments are required. The more closely sugar refining approximated this model, the more unstable the model became in practice. This instability led, in 1887, to the formation of the sugar trust. The author contends that the trust was formed not to exploit economies of scale but with the intent of achieving control over prices. In the second part of the book, Eichner describes the political and legal reaction that transformed monopoly into oligopoly. This sequence of events is best understood in terms of a learning curve in which the response of businessmen over time was related to the changing institutional environment in which they were forced to operate

La théorie post-keynésienne et la recherche empirique

The paper argues that post-Keynesian theory has reached a third stage in its development, that of empirically validating its arguments. The failure of the alternative neoclassical paradigm to meet any of the necessary empirical tests — the correspondence, comprehensiveness, parsimony and praxis tests in particular — is first pointed out. The methodological pitfalls which post-Keynesian theory must guard against if it is to avoid the same result are then indicated. From this line of argument emerges the imminent research agenda if post-Keynesian theory is eventually to place economics on a scientific basis by developing a body of theory which can be both empirically validated and conducive to further empirical research

La théorie post-keynésienne et la recherche empirique

The paper argues that post-Keynesian theory has reached a third stage in its development, that of empirically validating its arguments. The failure of the alternative neoclassical paradigm to meet any of the necessary empirical tests — the correspondence, comprehensiveness, parsimony and praxis tests in particular — is first pointed out. The methodological pitfalls which post-Keynesian theory must guard against if it is to avoid the same result are then indicated. From this line of argument emerges the imminent research agenda if post-Keynesian theory is eventually to place economics on a scientific basis by developing a body of theory which can be both empirically validated and conducive to further empirical research.

Searching for the Kuhnian moment : the Black-Scholes-Merton formula and the evolution of modern finance theory

The Black-Scholes-Merton formula has been put to widespread use by options traders because it provides a means of calculating the theoretically 'correct' price of stock options. Traders can therefore see whether the market price of stock options undervalues or overvalues them compared with their hypothetical Black-Scholes-Merton price, before choosing to buy or sell options accordingly. As a consequence of this close relationship between options pricing theory and options pricing practice, a strong performativity loop was activated, whereby market prices quickly converged on the hypothetical Black-Scholes-Merton prices following the dissemination of the formula. The theory has therefore had significant real-world effects, but how should we characterize the initial instinct to derive the theory from a philosophy of science perspective? The two books under review suggest that a Kuhnian reading of the advancement of scientific knowledge might well be the most appropriate. But, on closer inspection, it becomes clear that the publication of the Black-Scholes-Merton formula should not be seen as a Kuhnian moment with paradigm-shaping attributes. It is shown that, at most, the formula acts as an important exemplar which, via its use in the training of options pricing theorists and options pricing practitioners, reinforces the entrenchment of finance theory within the orthodox economics worldview

A multi-modal dance corpus for research into interaction between humans in virtual environments

We present a new, freely available, multimodal corpus for research into, amongst other areas, real-time realistic interaction between humans in online virtual environments. The specific corpus scenario focuses on an online dance class application scenario where students, with avatars driven by whatever 3D capture technology is locally available to them, can learn choreographies with teacher guidance in an online virtual dance studio. As the dance corpus is focused on this scenario, it consists of student/teacher dance choreographies concurrently captured at two different sites using a variety of media modalities, including synchronised audio rigs, multiple cameras, wearable inertial measurement devices and depth sensors. In the corpus, each of the several dancers performs a number of fixed choreographies, which are graded according to a number of specific evaluation criteria. In addition, ground-truth dance choreography annotations are provided. Furthermore, for unsynchronised sensor modalities, the corpus also includes distinctive events for data stream synchronisation. The total duration of the recorded content is 1 h and 40 min for each single sensor, amounting to 55 h of recordings across all sensors. Although the dance corpus is tailored specifically for an online dance class application scenario, the data is free to download and use for any research and development purposes