Market volatility and the dynamic hedging of multi-commodity price risk

Commodity cash and futures prices experienced a severe boom-and-bust cycle between 2006 and 2009. Increases in commodity price volatility have raised concerns about the usefulness of commodity futures and options as risk management tools. Dynamic hedging strategies have the potential to improve risk management when conditional (co)variances depart significantly from their unconditional, long-run counterparts and may be useful to decision-makers despite their greater complexity and higher transaction costs. We propose a Nonparametric Copula-based Generalized Autoregressive Conditional Heteroscedastic (NPC-GARCH) approach to estimate time-varying hedge ratios, and evaluate the benefits of dynamic hedging during four sub-periods between 2000 and 2011 using a stylized Texas cattle feedlot management problem. The NPC-GARCH approach allows for a flexible, nonlinear and asymmetric dependence structure between cash and futures prices for different commodities. We find that NPC-GARCH dynamic hedging performs better than either static, GARCH-Dynamic Conditional Correlation (DCC) or GARCH-Baba, Engle, Kraft and Kroner (BEKK) hedging in terms of lower tail risk (expected shortfall), but that there is no significant difference between hedging approaches in terms of portfolio variance reduction.     

Dictator monopolies and essential goods: experimental evidence

Monopolists set prices and if the good is unessential this may place the consumer in an uncomfortable position. But if the good is essential the consumer faces a pay-to-live or -die choice. Dictator and ultimatum games are superficially similar in that one game offers the right of refusal, while the other does not. The dictator monopoly is, however, not a game, and behaviour could be radically different in the market environment versus game environment. We recast the dictator game as a dictator monopoly experiment and find that the fairness characteristic of the game evaporates quickly as rounds progress.     

The effectiveness of community-based hospital planning: some recent evidence

The effectiveness of centralized or community-based local planning of hospital resources is still a subject for debate in most countries. The general problem of overcapitilization on beds and equipment has been reviewed in a number of theoretical (Granfield, 1975; Dahlberg 1976) and empirical studies (Cullis et al., 1980; Feldstein, 1967). Hospital planners frequently argue that the resulting direct benefits exceed the costs. The purpose of this paper is to estimate the impact of community-based hospital planning on controlling growth in the supply of beds and plant assets in the United States.     

Traditional space vs. cyberspace: The changing role of geography in current international politics

In the post‐Cold War world, the competition and restraint of the bipolar Cold War are both gone, giving rise to two opposing forces: the unifying force of globalisation and the fragmenting impact of nationalism and geographic conflict. In the current international system, these two forces are confronted in different ways by three types of states, each with its own priorities and place for geography. For high technology, or twenty‐first century states, the focus is on globalisation and disputes cannot be solved by territorial acquisition. For nationalistic, or nineteenth century states, nationalist hostilities still predominate and gaining land is often still more important than wealth. Transitional, or twentieth century states, are caught in a vice between their advanced technological potential and their economic and social crises. Any accurate depiction of the current system must include all three types of states, as well as how their interaction affects the goals and behaviour of each type.     

Expert and entrepreneur: the unique research domain of professional service entrepreneurs

Professionals are knowledge experts who create customized solutions for clients. Many professionals practice in the context of strong professional institutions that prescribe intense socialization and codes and norms. While some professionals work as employees, many start their own firms in order to practice. Firm start-up for professionals is more prevalent than for most other occupations. While professional institutions often constraint their activities, firm start-up for professional service entrepreneurs (PSEs) involves similar entrepreneurial activities as other entrepreneurs, creating an interesting paradox worth investigating. This paper explores the uniqueness of PSEs and the firms they start, and the distinctiveness and value of research in the context of PSEs and professional service firms.     

Has New Zealand benefited from its investments in research & development?

We use panel data for nine industries to evaluate research and development (R&D) investments in New Zealand over the past forty years. We estimate the impact of R&D stocks in a particular industry on output per person in that industry and on output per person in the rest of the economy. We examine both public and private R&D investments. Privately provided R&D has a statistically significant positive impact on own-industry output per person, suggesting it increases productivity. However, publicly provided R&D has no impact on own-industry output per person. There is also evidence that private R&D in certain industries positively affects output per person in the rest of the economy, i.e. it generates positive spillovers. There is no evidence of positive spillovers from publicly provided R&D.     

Science and Corporate Strategy: A Bibliometric Update of Hounshell and Smith

Hounshell and Smith's Science and Corporate Strategy: DuPont R&D, 1902- 1980 is one of the most comprehensive business history books ever written. In addition, it highlights the important relationship between corporate strategy and R&D activities. The purpose of this current paper is to update the information on DuPont's R&D activities using secondary data and bibliometrics. Our findings are that DuPont underwent a series of dramatic shifts in their R&D efforts during the 1980s and into the 1990s. For example, there was a focus on life sciences, a concerted attempt to reduce R&D, and an endeavour to align R&D more with core businesses. Beyond the bibliometrics, we found that corporate performance and changes in the top management team may have precipitated these changes in R&D. The implications of such relationships are also discussed.     

Gardiner C. Means's institutional and post-Keynesian economics

In this tribute to the work of Gardiner Means, we shall argue that his influence has been on a par with that of Keynes on economists of an unorthodox persuasion. It is argued that his pioneering work in studying the modern corporation as an institution that needs to be fully understood, renders him a first-rate institutionalist. Intriguingly, it is also suggested that his interest in the microeconomic foundations of macroeconomic performance are suggestive of post-Keynesian concerns.     

The power of asymmetric unit root tests under threshold and consistent-threshold estimation

The asymmetric unit root tests of Enders and Granger (Journal of Business and Economic Statistics, 16, 304–11, 1998) are examined using consistent threshold estimation and the original two-step procedure. In contrast to earlier studies, the ability of the tests to jointly reject the unit root and symmetry hypotheses is examined, thus permitting a fuller analysis of the tests' properties. Whilst the threshold autoregressive test is found to have little power in either its consistent or original forms, the consistent momentum-threshold autoregressive test is found to exhibit high power against a range of plausible alternatives when using newly derived critical values.