World market integration for export and food crops in developing countries: a case study for Mali and Nicaragua

Using a generalized error correction model, this article measures and compares market integration for export cash crops versus imported food crops for Mali and Nicaragua, and computes transmission elasticities between changes in the goods’ border and domestic prices. Both Mali and Nicaragua obtain the bulk of their export revenue from a particular agricultural commodity—cotton for Mali and coffee for Nicaragua—and both import the same key staple food of rice. To reap the economic gains from this trade specialization, the two countries’ agriculture must be well‐integrated into world markets. The two countries present an important policy contrast that affects their degree of world market integration and price transmission. In Mali, a parastatal enterprise controls its cotton industry, while Nicaragua has less state direction over agriculture. Reflecting this difference, the results show that for both its main export and import commodity, Nicaragua is more integrated into world markets and has higher price transmission than Mali. The results for Nicaragua also show much higher integration and price transmission for its main agricultural export (coffee) than its major import (rice).     

我国文化产业集聚度测算及其分布特征研究——基于省际面板数据的分析

笔者选用行业集中度指数和赫芬达尔指数两个指标,对中国文化产业2005年～2009年的集聚程度进行了测定,并从区域和行业两个角度分析了我国文化产业的集聚特征.分析结果表明:经营性文化产业空间集聚水平比较高,近年来其集聚程度在持续下降;而公益性文化产业集聚水平较低,但其集聚程度呈增长趋势,其中艺术表演团体增幅最大.从地域分布上看,文化产业主要集聚在经济发达的东部沿海省市,省域间发展极不均衡.     

Place in Entrepreneurial Storytelling: A Study of Cultural Entrepreneurship in a Deprived Context

We extend the cultural entrepreneurship perspective by investigating how entrepreneurs in deprived contexts gain legitimacy by leveraging proprietary and public places in their entrepreneurial storytelling. Inspired by the sociology of place, we present a longitudinal study of ten new venture journeys over four years in Kasoa, Ghana. We identify three distinct ways places are used in entrepreneurial narratives: projective significance of place, connective significance of place, and authoritative significance of place. We show how impoverished entrepreneurs construct and communicate places in diverse ways, not only as locations, but also as material and symbolic resources that provide legitimacy for their venturing activities. Drawing from our findings, we generate a model of place-based cultural entrepreneurship and elaborate place as a central resource in cultural entrepreneurship and new venture creation in deprived contexts.     

Measurement error and panel data1

The underidentification of linear models with measurement error does not necessarily extend to panel data models, as has been shown by GAiliches and Hausman (1986). We discuss and extend some of their results for a simple case and address particular issues concerning identification and asymptotic variances.     

Restricted maximum likelihood estimation under Eisenhart model Ill

For a balanced two-way mixed model, the maximum likelihood (ML) and restricted ML (REML) estimators of the variance components were obtained and compared under the non-negativity requirements of the variance components by L ee and K apadia (1984). In this note, for a mixed (random blocks) incomplete block model, explicit forms for the REML estimators of variance components are obtained. They are always non-negative and have smaller mean squared error (MSE) than the analysis of variance (AOV) estimators. The asymptotic sampling variances of the maximum likelihood (ML) estimators and the REML estimators are compared and the balanced incomplete block design (BIBD) is considered as a special case. The ML estimators are shown to have smaller asymptotic variances than the REML estimators, but a numerical result in the randomized complete block design (RCBD) demonstrated that the performances of the REML and ML estimators are not much different in the MSE sense.     

关系取向对员工满意影响的实证研究

在现有文献中,有关关系取向对员工满意影响的研究尚属空白.(1)通过15位服务人员的深度访谈,对关系取向的内涵进行定性探索;(2)预调查对量表的信度和效度进行评价并修改部分问项;(3)对天津连锁药店的86位店长和217位销售人员的正式问卷调查表明:关系取向、关系交换与员工满意正相关;个体文化差异对关系交换有负向影响,而对关系取向有正向影响.研究结果可以指导经理们提高上下级关系管理的有效性.     

安徽省城乡居民收入与消费关系的协整分析

本文运用协整和误差修正模型,以安徽省1984—2006年的统计资料为样本,构建了城乡居民长短期的收入与消费模型,对城乡居民收入与消费之间的关系进行了分析。结果表明：安徽城乡居民的收入和消费之间各自存在着长期的均衡关系,在人均消费的层面上,城镇居民对于消费增长的支持大于农村居民,农村居民的消费需求还有待提高。     

FDI与中国二元经济结构演化——一个动态实证分析的考量

FDI理论和二元经济结构理论一直以来都是国内外主流经济学者研究的热点问题。但是从理论上和实证角度把二者结合起来研究的文献并不多见。为此,本文首先从古典增长理论模型出发,论述FDI对我国二元经济结构演化的影响,理论模型研究表明,FDI在促进中国经济非农化的过程中有可能加大了农业与非农业的技术与就业差距,从而加深了二元经济程度。然后重点从实证角度、运用统计分析和因果关系检验、协整检验及修正误差模型检验等计量分析手段深入研究和检验二者的长期与短期动态均衡关系。研究结果表明,FDI在促进中国经济非农化和工业化的同时,在一定程度上却加剧了中国的二元经济程度。对此,本文在最后强调应该加大对FDI的产业调整力度、规范其投资流向,同时建立一套长效机制,实现农村生产要素的市场化与整合,充分挖掘FDI在转变农业生产方式方面的潜在作用,缩小农业与城市部门生产效率的差距。     

景观——文化遗产整体性保护的新视角

地理学及景观生态学中关于景观的学术思想,为研究文化遗产保护与利用问题提供了科学指引。针对我国现阶段文化遗产保护利用中的问题,分析了在景观视角下进行文化遗产研究的必要性。通过对文化遗产景观的整体性、系统性,遗产地自然、经济和社会结构的复合性,景观价值的多样性和景观空间、时间及其文化属性的统一性等特征的探索,阐述文化遗产整体性保护与利用的合理途径。