World Oil Depletion Models: Price effects compared with strategic or technological interventions

World oil depletion, including natural gas liquids, was modelled in the past by many authors. Recently, Guseo and Dalla Valle have introduced and Guidolin has applied a new approach following perturbed life-cycle diffusion models. Here we examine joint effects of economic and strategic or technological interventions using a Generalized Bass Model (GBM). Statistical analysis takes into account three different hierarchical levels: natural diffusion, long memory interventions and stochastic components. The main results confirm the statistical significance of historical 1970s shocks and highlight a strong long memory effect due to an increase in oil production after World War II. The estimated peak-date, 2007, and the 90% depletion time, 2019, are determined under an equilibrium intervention hypothesis.     

我国构建绿色税制问题探析

我国环境污染问题日益严重,令人担忧.绿色税制作为政府宏观调控的重要手段,在许多国家的环境保护过程中发挥了重要作用,如法国、美国等均建立了比较完善的绿色税制.目前,我国的税制框架中虽然包含了一些绿色税种,如资源税、消费税等,但在设计、征收与管理过程中仍然存在很多问题,政府和公众还没有充分认识到绿色税制在环境保护中的重要性,因此,树立新的税收观念,建立与完善我国绿色税制势在必行.     

论国际经济法的形成发展与知识产权国际保护

国际经济法是国际公法的一个重要组成部分，它经过了三个阶段的形成与发展。特别是自上世纪70年代以来，国际知识产权组织成立，国际知识产权的法律地位日益突出，知识产权的法律保护也就成为各国关注的焦点。如何推动更公平、平等的国际经济新秩序和知识产权法律的完善与发展，是值得研究的新课题。     

我国旅游价格管理：现状、改革背景与政策分析

旅游业发展是一项复杂的系统工程，需要各相关行业和各项政策措施的配套协调。由于旅游价格的杠杆效应，如何应对入世给我国旅游业带来的挑战，改革并完善与国际接轨的旅游价格管理新体制是每一个旅游价格管理工作者应当思考的现实问题。     

会计信息质量与市场定价分析

本文以应计质量、盈余持续性、盈余可预测性、盈余平滑度作为会计信息质量的代理变量,通过研究会计信息不同纬度的质量与权益资本成本之间的关系,为投资者的市场定价及对信息质量的关注程度提供证据。研究结果表明,除盈余的持续性不显著外,其他各项质量与权益资本成本之间均呈负相关关系;在对权益资本成本的影响程度方面,无论是单独影响还是条件影响,应计质量影响程度最大,其次是可预测性。     

对企业技术创新自我实现的经济学分析

本文从经济学的理论角度分析了企业技术创新自我实现的可能性。分析发现：产品被成熟生产后的产量与资本报酬和资本边际生产率的大小有直接关系。因此，企业发展内部本身就可以通过市场供需调节来实现创新的循环和延续。从这一点上说，国家对于企业技术创新的鼓励政策应该更加依靠市场机制的作用。     

Theory Analysis of Model for Price Fluctuations in a Single Commodity Market

The price model for a single commodity market is a very important economic model that describes the basic rules for price fluctuations in a single commodity market. In this paper, we investigated the general case for the model, and proved that every positive solution is bounded and we obtained a necessary and sufficient condition for oscillation of every positive solution concerning positive state solution.     

Idea and goals of environmental protection and ecological construction in the 11^th five-year plan period

In this paper, the executive of the 10th Five- Year Plan in the field of environmental protection and ecological constrution is reviewed, and the charactristics of economic growth and its environmental impact on the 11^th Five-Year Plan is forecasted and analyzed. A principal idea of eavironmental protection and ecological construction is put forward for the 11^th Five-Year Plan pertod： strensgthen the point treatment in key areas and set the main targets based on the idea. The relating countermeasures in national level are proposed as follows： set up appropriate ideas for official achievements by launching resources and environmental cost acconting; adjust the industrial struacture actively by industrial policies and strenuous work; develop circular economy, change the mode of environmental protecgon from end treatment to headstream and proeess control： strengthen the market mechanism in the process of pollution treatment, set up the system of ＂who treats who benefits＂ ; perfect interrelated laws and standards, strengthen the ability of environmental munagement; lay extra emphasis on two key targets： water pollution tretment in key river basins and management of the reserves; and combine the ecological consnuction and poverty alleviation in higher level.     

成都创建国家环境保护模范城市的启示

成都市创建国家环境保护模范城市活动进一步改善了城市创业环境和人居环境,全面提升了城市服务功能与综合价值,提高了公众生活质量,使成都市初步走上了环境和经济相互促进,人与自然和谐共生的可持续发展道路,呈现出经济快速发展、环境清洁优美、生态良性循环的良好态势。从成都创建国家环境保护模范城市实践中,我们可以得到以下启示:创建国家环境保护模范城市是构建和谐社会,落实科学发展观,全面建设小康社会,提高城市综合实力与城市竞争力的前提;创建国家环境保护模范城市必须承担发展经济和保护生态的双重任务,并且需要建立持续增长的投入机制;国家环境保护模范城市建设更需要注重生态型社会的建设。     

The price relationship between organic and non-organic vegetables in the U.S.: evidence from Nielsen scanner data

This study investigates price relationships between organic and conventional carrots, tomatoes, and lettuce in the U.S. utilizing Nielsen scanner data from 2006–2015. We employ a threshold vector error correction model (TVECM), threshold vector autoregressive model (TVAR), and threshold cointegration test to test whether market integration exists between organic and conventional vegetables as well as the existence of asymmetric price transmission. The results find positive long-run relationships between organic and conventional prices of carrots and tomatoes and show the existence of asymmetric price transmission in price pairs of lettuce and tomatoes. Our findings suggest that the price relationship between organic and conventional vegetables varies by characteristics, such as shelf life, volatility in the price premium, and substitutability.