Consumer Affairs in Rural New Zealand

Recent changes in many areas of Government policy as well as changes in the private sector have had major impacts on the provision of services in rural areas of New Zealand. This report describes the results of a New Zealand survey of 795 rural consumers. The results emphasise how the problems perceived as most important to people in rural areas are essentially linked to fundamental services such as housing, water, communications, and transport. Though this element of basic needs is covered in the consumer policy literature it is not a feature that tends to be emphasised. The survey also gauges some aspects of rural consumers' knowledge of their entitlements under New Zealand consumer law and their familiarity with, and use of, consumer advisory and support services.     

The Climate Policy of the European Union

There is now almost universal agreement that climate change, with potentially disastrous consequences, is happening and that it is contributed to by human activities. This Forum is dedicated to the discussion of various aspects of the European Union's climate policy, e.g. the EU's future role in the global effort to combat global warming, the efficiency of its climate strategy, the design of a new rule for sharing the corresponding burdens fairly among member states, and the interrelationships between the Union's climate policies, on the one hand, and its energy and transport policies, on the other. * and member of the German Advisory Council on Global Change (WBGU). The author wishes to thank Helen Bicknell (Mainz University of Applied Sciences), Oliver Deke (WBGU) and Jürgen Schmid (ISET, Department of Efficient Energy Conversion at the University of Kassel) for their helpful comments. ** This contribution is based on a Jean Monnet Lecture held at Aarhus University on 19 March 2007. The author would like to thank Harri Kalimo for valuable comments.     

Where is the value added of rebalancing? A systematic comparison of alternative rebalancing strategies

This study compares the performance of different rebalancing strategies under realistic market conditions by reporting statistical significance levels. Our analysis is based on historical data from the United States, the United Kingdom, and Germany and comprises three different classes of rebalancing (periodic, threshold, and range rebalancing). Despite cross-country differences, our history-based simulation results show that all rebalancing strategies outperform a buy-and-hold strategy in terms of Sharpe ratios, Sortino ratios, and Omega measures. The differences in risk-adjusted performance are not only statistically significant, but also economically relevant. However, the choice of a particular rebalancing strategy is of only minor economic importance.     

Semiparametric diffusion estimation and application to a stock market index

The analysis of diffusion processes in financial models is crucially dependent on the form of the drift and diffusion coefficient functions. A new model for a stock market index process is proposed in which the index is decomposed into an average growth process and an ergodic diffusion. The ergodic diffusion part of the model is not directly observable. A methodology is developed for estimating and testing the coefficient functions of this unobserved diffusion process. The estimation is based on the observations of the index process and uses semiparametric and non-parametric techniques. The testing is performed via the wild bootstrap resampling technique. The method is illustrated on S&P 500 index data.     

Characterizing the sustainability problem in an exhaustible resource model

We provide a general condition under which consumption can be sustained indefinitely bounded away from zero in the continuous time Dasgupta–Heal–Solow–Stiglitz model, by letting augmentable capital substitute for a non-renewable resource. The assumptions made on the production function are mild, thus generalizing previous work. By showing that Hartwick?s rule minimizes the required resource input per unit of capital accumulation, and integrating the required resource input with respect to capital, we obtain a complete technological characterization without reference to the time path. We also use the characterization result to establish general existence of a maximin path.