How much energy will your NGN consume? A model for energy consumption in next generation access networks: The case of Spain

The contribution to global energy consumption of the information and communications technology (ICT) sector has increased considerably in the last decade, along with its growing relevance to the overall economy. This trend will continue due to the seemingly ever greater use of these technologies, with broadband data traffic generated by the usage of telecommunication networks as a primary component. In fact, in response to user demand, the telecommunications industry is initiating the deployment of next generation networks (NGNs). However, energy consumption is mostly absent from the debate on these deployments, in spite of the potential impact on both expenses and sustainability. In addition, consumers are unaware of the energy impact of their choices in ultra-broadband services. This paper focuses on forecasting energy consumption in the access part of NGNs by modelling the combined effect of the deployment of two different ultra-broadband technologies (FTTH-GPON and LTE), the evolution of traffic per user, and the energy consumption in each of the networks and user devices. Conclusions are presented on the levels of energy consumption, their cost and the impact of different network design parameters. The effect of technological developments, techno-economic and policy decisions on energy consumption is highlighted. On the consumer side, practical figures and comparisons across technologies are provided. Although the paper focuses on Spain, the analysis can be extended to similar countries.     

Yield Variability and Harvest Failures in Russia,Ukraine and Kazakhstan and Their Possible Impact on Food Security in the Middle East and North Africa

Exports from Russia, Ukraine and Kazakhstan (RUK) help to improve global wheat availability and, hence, global food security. During the past 15 years, however, RUK wheat exports have shown high variability, mainly because they have been repeatedly diminished by severe harvest failures. We present an outlook for RUK wheat production and exports up to 2027, taking into account possible yield variability and harvest failures, and focusing on the impact on food security in the Middle East and North Africa (MENA), the world’s major wheat importing region. For the analysis we use the stochastic version of the Aglink-Cosimo model. Simulation results show that wheat yields in RUK are a major source of uncertainty for international wheat markets. The projected substantial increases in world market prices due to limited RUK wheat exports threaten food security in MENA and highlight the need for both stabilising RUK yields and novel complementary food security approaches to decrease MENA’s vulnerability to disruptions in agricultural world markets.     

Equity risk versus retirement adequacy: asset allocation solutions for KiwiSaver

New Zealand's KiwiSaver superannuation system operates with a conservatively low asset allocation towards equity investments. Evidence suggests ‘conservative’ portfolios are riskier than portfolios holding more growth assets when considering shortfall risk. This study employs stochastic simulation to determine the optimal asset allocation to improve the balance of probabilities for retirement adequacy. The findings show that KiwiSaver default funds are excessively conservative, preventing investors from reaching their retirement goals. Increasing the asset allocation to equities across the range of available KiwiSaver funds is the only solution to significantly improve retirement adequacy in New Zealand given the low contribution rates observed.     

Britain and BrExit: Is the UK more attractive to supervisors? An analysis of the wage premium to supervision across the EU

We studied which European Union (EU) economy was more attractive prior to Brexit for employees in supervisory positions. We estimate the extra wage that supervisors earn relative to their subordinates—the wage premium to supervision (WPS)—at different quantiles of distribution of wages for 26 European economies. We find that the UK rewards supervisors more than other EU economies. Moreover, the WPS increases with wage and so increases wage inequality. Over 10% of the WPS depends on the national economic context. We discuss the implications for immigration and policymakers in relation to the post-Brexit process.     

Heterogeneity in property tax capitalization: Evidence from municipalities in Wisconsin

This article provides evidence that higher property taxes usually decrease property value. On average, a 10% increase in property taxes decreases property value by more than 0.34%. To control for school quality and related sorting, we estimate within-school-district property tax impacts. The effective cost of services (driven by appraisal errors or tax code changes), preferences for local services, and the elasticity of supply of housing all play an important role in determining whether property taxes increase or decrease house prices. Locally produced and consumed municipal services such as trash collection are positively capitalized.     

Sources of uncertainty in functional measurement methodology

Quality & Quantity - Functional measurement methodology is applied in many psychological fields to investigate cognitive operations of information integration that people use in judgment and...     

Integrating virtual reality devices into the body: effects of technological embodiment on customer engagement and behavioral intentions toward the destination

ABSTRACT

Virtual reality devices create a high integration of technologies with human senses. However, few studies analyze how embodied technologies affect customer pre-experiences with a destination. Results from a lab experiment show that compared to desktop PC and mobile phones, VR head-mounted displays generate more immersive experiences, higher sensory stimulation, more engagement, and higher behavioral intentions toward the destination. Immersion and sensory stimulation mediate the effects of technological embodiment on engagement and behavioral intentions. Furthermore, active (versus passive) tourism content strengthens these effects. Our results stress the role of technological embodiment to generate effective pre-experiences with potential tourists’ destinations.     

Algorithmic Pricing What Implications for Competition Policy?

Review of Industrial Organization - Pricing decisions are increasingly in the “hands” of artificial algorithms. Scholars and competition authorities have voiced concerns that those...