Consistent High-precision Volatility from High-frequency Data

Estimates of daily volatility are investigated. Realized volatility can be computed from returns observed over time intervals of different sizes. For simple statistical reasons, volatility estimators based on high-frequency returns have been proposed, but such estimators are found to be strongly biased as compared to volatilities of daily returns. This bias originates from microstructure effects in the price formation. For foreign exchange, the relevant microstructure effect is the incoherent price formation, which leads to a strong negative first-order autocorrelation ρ(1)≃40 per cent for tick-by-tick returns and to the volatility bias. On the basis of a simple theoretical model for foreign exchange data, the incoherent term can be filtered away from the tick-by-tick price series. With filtered prices, the daily volatility can be estimated using the information contained in high-frequency data, providing a high-precision measure of volatility at any time interval.
(J.E.L.: C13, C22, C81).     

Der Marktplatz E-Energy aus elektrizitätswirtschaftlicher Perspektive

The E-Energy Market is the place in a future energy system that integrates the markets for energy and Information/Communication Technologies (ICT). From the economic perspective of electricity, business models and business cases can already be developed for sub-markets and sub-areas of network load management, wholesale marketing and energy-market regulations, which as core elements manage consumer load in the mass customer area. As it turns out, the expected surplus value for all business cases is still tightly assessed and the E-Energy Market is therefore no automatic process. It has been assumed that the costs of the necessary information and communication technologies either do not have to be observed or are relatively insignificant. Additionally, considerable fine-tuning of the design of the sub-markets and the regulatory framework is necessary in order to enable the possibility for the business cases to be implemented. In a larger perspective, however, this market will play an important role when it comes to optimizing the power system around fluctuating power generation.     

Editor's note

We are very excited about this issue of the Journal. It inaugurates a new alliance among the University of Michigan, John Wiley & Sons, and the Society for Human Resource Management. For 34 years, the University of Michigan has had editorial responsibility for Human Resource Management; for the last 12 years Michigan and Wiley have partnered in publishing the Journal. Beginning with this issue, the Society for Human Resource Management (SHRM) will join us to edit, publish, and distribute the Journal; Michigan will continue to take editorial leadership. With an outstanding Managing Editor (Gerry Lake); prominent Associate Editors, (Dick Beatty, Sharon Lobel, Craig Schneier, Arthur Yeung, and K. Michele Kacmar), and a world-class Editorial Board, the Journal will continue to push frontiers of HR theory, research, and practice. Wiley will continue to offer publishing expertise, and SHRM brings to this alliance the world's largest association of HR professionals (over 70,000 members). SHRM also, through its foundation, has a commitment to theory and research which further the profession of HR.     

International Co‐movements of Business Cycles in a ‘Phase‐locking’ Model

The possibility of co‐movements in the cyclical variations of aggregate output in different countries has received increasing attention in recent years. The present paper derives sufficient conditions for the occurrence of persistent co‐movements in the mean processes of aggregate economic variables of different countries, an effect called ‘phase‐locking’. The fact that the ‘phase‐locking’ effect results under fairly elementary assumptions may be taken to challenge the sophisticated theoretical speculations about the international transmission of business cycles. International co‐movements may simply be due to a ‘technical’ effect which is generic to interrelated cycling dynamic systems.     

Auswirkungen der Markttransparenzstelle für Kraftstoffe

The authors analyse how the market transparency unit for fuels in Germany affects both supplier and consumer behaviour. The number of price changes has increased, mainly due to increasing price cuts, as has the spread between the lowest and the highest price of the day — both indicators of intensified competition. The concern that the introduction of the market transparency unit would facilitate collusion appears not to be warranted. In contrast, competition has intensified and consumers are increasingly making use of the price differences. The analysis also reveals that consumers purchased more gasoline in times of low prices (so-called price valleys) in 2015 than they did in 2012. The change in consumer behaviour is an indicator that at least some drivers tend to use fuel price comparison apps fed by data from the market transparency unit.     

Addressing Governance Gaps in Global Value Chains: Introducing a Systematic Typology

Journal of Business Ethics - Multinational enterprises (MNEs) dominate the governance of global value chains (GVCs), such that according to the concept of political corporate social responsibility...