Drivers and barriers to the adoption and diffusion of Sustainable Jet Fuel (SJF) in the U.S. Pacific Northwest

Sustainable Jet Fuel (SJF) represents an important component of the airline industry's strategy to simultaneously reduce GHG emissions while meeting a growing demand for international air travel. SJFs also have the potential to provide fuel supply diversification and security, enhance fuel price stability and provide regional/rural economic development benefits. This paper measures and ranks perceived drivers and barriers to an economically viable SJF industry in a unique U.S. region, the U.S. Pacific Northwest (PNW), through personal interviews with key aviation fuel supply chain stakeholders conducted from June to September 2015. In addition to providing a fertile arena for this first effort to systematically assess these drivers and barriers, the U.S. PNW is unique due to the region's long strategic focus on aviation innovation and its importance to the regional economy, the seminal efforts in the region to outline a path forward on SJF beginning in 2010, and the relatively small population spread over a large geographic area with a limited number of “hub” airport nodes which geographically concentrates aviation fuel demand and distribution. Nineteen stakeholder interviewees acknowledge that, in order for regional SJF adoption-diffusion to occur, airline jet fuel buyers must drive the process, particularly as they deal with greenhouse gas (GHG) emission issues and related policy considerations. Important perceived barriers to SJF industry scale-up in the U.S. PNW include the high production costs of SJF and related issues, such as fuel logistics and quality control in the transport, storage, and blending of SJFs. Perceptions around chain-of-custody issues, such as blending, tracking, and crediting of SJFs and future SJF market share projections for the year 2030 were also examined. Incorporating stakeholder input into discussions about adding blended SJF into the U.S. aviation fuel supply provides needed insight for the biofuels industry, policymakers, and researchers.     

我国液态生物质燃料适度发展规模研究——宏观经济视角的分析

本文通过构建简单的总供给一总需求模型,分析石油数量调控政策、潜在产出水平与均衡价格上涨之间的数理逻辑关系,进而间接得到液态生物质燃料适度规模问题的一般分析框架,为进一步的定量分析打下坚实基础。研究结果表明:为达到潜在产出水平和一定的价格上涨水平,不同的现实条件要求政府实行不同的石油数量调控政策。     

STRATEGIC EXPORT POLICY IN VERTICALLY RELATED MARKETS

This paper analyses how strategic export policies are affected by introducing an imperfectly competitive intermediate good into a Bertrand duopoly model with product differentiation, where a home and a foreign final‐good firm export to a third‐country market. It is shown that when the home and foreign markets for the intermediate good are segmented, the optimal export policy towards the final good is a tax. In contrast, under integrated markets, the optimal export intervention is a subsidy. Whether bilateral export intervention is welfare improving compared with free trade, depends on the degree of product differentiation between the home and foreign final goods.     

Disaster‐Relief Logistics With Limited Fuel Supply

Disaster‐relief logistics consists of providing adequate emergency supplies rapidly to the affected people so as to minimize human suffering and death. This study empirically examines the impact that the shortage of fuel, a commonly encountered problem in many disaster situations, can have on the effectiveness of disaster‐relief logistics operations. We focus on investigating the following two issues: (1) whether the shortage of fuel is more damaging in attaining logistical goals than the equivalent‐sized shortage in emergency supplies themselves, and (2) what types of vehicles should be used when the fuel supply is limited. Results suggest that the shortage of fuel may be more damaging than the shortage of emergency supplies, and that smaller trucks may be preferred to larger trucks when the shortage of fuel becomes severe.     

生物气固体氧化物燃料电池研究进展

对近年来国内外生物气固体氧化物燃料电池发电领域的研究进行了归纳分析。在介绍生物气产生和氧离子型固体氧化物燃料电池产电原理的基础上，总结了固体氧化物燃料电池以生物质产出的生物气为燃料发电所涉及的电化学反应；介绍了国外研究者对该类发电过程进行的试验和模拟研究；同时，对生物气结合固体氧化物燃料电池的研究进展进行了分析。得出的结论为，生物气结合固体氧化物燃料电池进行产电具有重大的实际和环保意义。     

燃油加油机体积量示值误差测量不确定度分析

依据JJG443-2006《燃油加油机》计量检定规程,对燃油加油机主标准器采用容积比较法,在规程规定条件下,对测得的容积进行温度补偿;求得加油机的准确容值,并对其进行测量结果不确定度分析、评定。     

Foreign monetary shocks,differentiated products and international transmission: a two-country model with intra-industry trade

In this paper we study how the impact of a foreign monetary shock is transmitted between two monopolistically competitive economies engaging in intra-industry trade with differentiated products. Intra-industry trade is the only international link that works through the flexible exchange rate affecting national price levels and a product's internal and external relative prices. While national price levels are subject to purchasing power parity, the two relative prices are determined by the interaction between macro and micro variables. In this context, the exchange rate can insulate a national economy perfectly from a foreign monetary shock provided that monopolists adjust prices. Even if monopolists keep prices rigid, this shock only affects domestic real balances and aggregate demand, leaving domestic aggregate output unchanged because the real balances effect is just offset by the resulting unfavorable relative prices effects under the assumption of Spence-Dixit-Stiglitz preferences.     

补贴概念与效果

补贴是一个相当复杂的议题,其复杂性不仅表现在概念上,也表现在它可能产生的效果上。补贴可能增加也可能降低其受体的利润水平;可能对国际贸易产生扭曲效果,其影响也可能仅限于国内;可能有助于政府实现其意欲达成的目标,也可能背离其初衷;可能增加或降低政府收益,也可能无影响。把补贴宽泛地界定为有可能在短期、中期或长期对其受体的利润水平产生影响的政府作为(或不作为),有助于使决策者把关注重点转向补贴效果,从而有利于其做出应否维持、增加、减少或消除特定补贴的判断。     

Differentiation Among US Colleges and Universities

Colleges and universities in the US differ markedly in their access to economic resources. National data are used here to describe the resulting hierarchy that's reflected in schools' spending on their students, the prices those students pay, and the subsidies they get in consequence. Both historical data and projections based on recent institutional saving suggest that economic disparities among institutions and their students are increasing. In a final section, the paper asks what to make of this: what we can say about the right degree of institutional disparity – whether we have too much, too little, or about the right amount of differentiation.     

Analysis of China＇s Renewable Energy Development under the Current Economic and Technical Circumstances

At present, the development of renewable energy relies mainly on government support. The government invests in a considerable number of projects to improve public welfare and to assist in poverty relief If China is to replace fossil fuels on a large scale with renewable energy sources, the production costs and prices of renewable energy must be brought down. All countries are facing the challenge of moving to a more secure and low-carbon energy system without weakening economic and social development. In this regard, China is facing an even greater challenge in terms of economic cost, as cheap coal remains the main energy form. Technical innovation and industrialization in the area of renewable energy is an important means of lowering cost. China is in for a period of high-speed development of its economy and the rising demand for energy is irreversible. If the technical progress and development speed of renewable energy lags behind the growth in demand, it will be difficult to realize the improvement of its energy structure.