新疆棉农残膜回收行为影响因素及实证研究*——基于棉农的调研数据

［目的］为响应农业农村部“农业绿色发展五大行动”,加强农业面源污染防治,缓解新疆棉田残膜危害,基于新疆棉农的问卷调查研究棉农的残膜回收行为。［方法］采用描述性统计和Logistic回归模型分析影响新疆棉农残膜回收行为的因素。［结果］（1）新疆农用地膜回收率低,地膜污染形势严峻。（2）棉农对残膜危害认知缺乏,对残膜回收的间接价值认识不足,影响新疆残膜回收效率。（3）残膜回收的成本收益是影响棉农残膜回收行为的关键因素,其他如棉农年龄、种棉年限、对残膜危害的认知等自身特征,以及农户劳动力数量、政府对残膜污染的关注程度等因素对棉农的残膜回收行为有重要影响。［结论］网络及电视广播等现代媒体对棉农的残膜危害认知水平有较大影响,棉农更愿意采用成本更节约的焚烧、堆地的残膜处理方式。因此提出引导棉农残膜回收、提高棉田残膜回收效率的对策建议。     

Generating Enhanced Fishery Rents by Internalizing Product Quality Characteristics

This paper demonstrates howadditional rents are generated in a fisherycharacterized by intraseasonal variation infish characteristics, including size,condition, and composition. Based on anexpanded conceptual model of the optimalharvest rule, fish characteristics affect preand post harvest production yields and outputprices. A dynamic empirical model, which uses asystem of quality characteristics and anhedonic equation, illustrates the complexrelationships and management choices associatedwith internalizing seafood qualitycharacteristics in a hake fishery. The modelretains the regulated open access managementsystem, but controls intertemporal andintersectoral quotas, production portfolios,and total allowable catch. Results demonstratethat including revenue-side effects frominternalizing fish quality can generatesignificantly greater rents and reduce therelative benefits of increased productionyields. If excluded, bioeconomic models canunderestimate the level of regulatory rentdissipation and overemphasize managementobjectives such as full utilization, whichcould misdirect processing decisions and resultin a suboptimal resource management plan.Implications for data collection,multidisciplinary analysis, and improvements inmarine resource management are discussed.     

浅论全面建成小康社会视域下的协调发展

协调发展观点作为整体发展思想的一部分由来已久,随着经济社会的发展,对于协调的重视程度也在不断加深。目前进入全面建成小康社会的决胜时期,作为全面小康题中应有之义的协调更是内涵丰富,意义重大,是建成全面小康的重要组成部分。它不仅包涵人与自然、区域、城乡的协调发展,还包括物质与精神两大文明、经济社会和国防领域间的协同发展。必须坚持把协调发展贯穿于发展各方面、全过程,才能使协调发展理念在促进新时代经济社会发展,做好全面小康这篇大文章上发挥出其时代价值。     

Trajectories in human domination of ecosystems: Human appropriation of net primary production in the Philippines during the 20th century

The “human appropriation of net primary production” (HANPP) has been suggested as a comprehensive indicator to measure impacts of human land use on ecosystems. It accounts for (a) human-induced changes in biological productivity and (b) biomass harvest. This study presents an analysis of aboveground HANPP in the Philippines between 1910 and 2003, a period characterized by massive deforestation and increases in land use intensity and biomass extraction. Results show a steep increase of aboveground HANPP from just below 35% of potential productivity in 1910 to slightly above 60% in 1970 and constant values since then. Large-scale changes in land cover and agricultural practices were the main direct determinants of this trajectory in HANPP. Remarkably, HANPP grew at much slower pace than population did: While the amount of NPP appropriated by humans doubled throughout the period, population increased by a factor ten. Increasing efficiency in terms of biomass extraction per unit of area, relying on ever-increasing inputs, and changes in the nation's physical biomass trade balance were of major importance for this difference in growth rates. In the coming decades, the Philippines will have to face the challenge to meet increases in biomass demand without putting even higher strains on the ecosystems.     

Using the Pack‐and‐a‐Half Rule to Eliminate Backroom Inventories in Retail Operations

In the retail industry, backroom inventories are typically associated with higher labor costs and greater operational complexity. Thus, retailers look for ways to eliminate backroom inventories. A heuristic used for this purpose is the pack‐and‐a‐half rule which suggests that the shelf space allocated for a product should be at least 50% larger than the case pack quantity in which the product is delivered. Despite its popularity among retailers, the pack‐and‐a‐half rule has been ignored in the academic literature. We introduce the pack‐and‐a‐half rule, assess its impact on a retailer's profits, identify cost, demand, and product characteristics driving this impact, and propose a modification. Based on an analysis of data obtained from a retailer on 1,986 SKUs in 20 categories, we find that the pack‐and‐a‐half rule decreases a retailer's profits, on average, by 10% when applied uniformly across all SKUs. Further, this decrease is significantly affected by product depth, product width, demand elasticity, case pack quantity, and inventory carrying cost. Finally, we develop a set of modifications based on these variables where the pack‐and‐a‐half rule is applied selectively and in a stepwise fashion. These modifications limit the decrease in a retailer's profits to a range between 6% and 7%.     

浅谈语境设置在英美概况课中的应用

本文通过了解语境这一概念以及语境设置的意义来分析语境的设置在大学英美概况课程中的应用,说明了语境的设置对英美概况教学中学生能力的培养具有非常重要的作用。     

生态与经济发展的鸿沟

文章主要从词语来源与含义、研究对象的组织层次等方面系统地对比和阐述了生态学和经济学的接近或相似。生态学和经济学的学科性质和环境问题的日益严重决定了二者之间交叉学科的出现;经济学借鉴生态学,二者逐步走向融合。但由于＂生态＂是保守的,而＂经济＂是积极主动的,所以在经济与生态发展之间仍存在＂鸿沟＂。怎样处理和解决二者之间的矛盾,跨越＂鸿沟＂是摆在国内外学者们面前的一个重大课题。笔者认为,解决的途径仍应该是学科间的交融,这为科学研究提供了新的探索空间。     

城市餐厨垃圾回收特性研究综述

随着人们的生活水平日益提高,我国城市餐厨垃圾的数量在不断增加,若不及时进行回收处理,不但浪费了资源,而且造成环境的严重污染,危害人们的身体健康。然而餐厨垃圾的回收利用要以其特性为基础,因此文中在对相关文献进行综述性研究的基础上,梳理和总结了餐厨垃圾的资源性和危害性,以及回收特性,以期为餐厨垃圾的物流系统的构建提供研究基础。     

Tourism Market Recovery in the Maldives After the 2004 Indian Ocean Tsunami

SUMMARY

This paper will use a range of tourism data and a case study to examine the rates of recovery of ten source markets for the Maldives in the wake of the 2004 Indian Ocean tsunami. The market response and recovery rates for these ten markets varied significantly and the reasons for this will be explored. It is evident that a 'one size fits all' marketing strategy will not in itself be sufficient to achieve acceptable rates of recovery following a disaster. The strategies, opportunities and rates of market recovery experienced in the Maldives will provide useful insights for the marketing and monitoring of other destinations that have experienced a crisis or disaster.     

Customers Vote with Their Forks

Abstract

This study examines Consumer Complaint Behavior (CCB) in the restaurant industry. The purpose for this study is twofold: (1) To examine how gender, age, family status, and household income relate to ten common customer complaints: rudeness, lack of product knowledge, slow service, uncleanliness, inattention, forgetfulness, incorrect billing, rushed service, and overly-friendly service; and, (2) to examine the manner in which customers express their complaints. Three types of complaining behavior were considered: verbal, written, and not returning to the restaurant. Analysis of the data resulted in a demographic profile of consumer complaining behavior. Some key findings include: Documented complaints are underrepresented, yet these detailed criticism are far more prevalent than those customers who chose not to express their dissatisfaction with service. Children heighten the expectancy of efficient and quick service. Those who complain are members of upscale socioeconomic groups. Implications for management are discussed, including a recommendation to encourage customer complaints and to immediately react to them.