Different Roles of Land in Rural-Urban Migration： Evidence from China＇s Household Survey

This paper explores the influence of land holding on rural–urban migration using China's 2008 household survey data. It shows that the contradictory findings of existing published literature can be explained by introducing a migration distance variable. The empirical studies show that land holding plays a different role in short‐distance and long‐distance migration. Land holding has a U‐shaped curve association with the probability of short‐distance migration and has an inverted‐U‐shaped association with the probability of long‐distance migration. Therefore, the government needs to provide more job information and migration subsidies to farmers who have little land to overcome difficulties in the process of migration so as to reduce rural–urban inequality.     

Outdoor recreation expenditures and the effects of spatial structure

Abstract

Visitor expenditure models have been the focus of substantial attention in outdoor recreation research because of their significance in estimating local economic impacts. At the disaggregate level models have usually included simple measures of distance decay and variables representing the attributes of households and supply features. Scholars have ignored the differential effects that the spatial structure of opportunities might have upon expenditures. This paper presents an analysis of the effects of spatial structure upon visitor expenditures for outdoor recreation in Oklahoma. Analyses are presented which identify and differentiate the relative effects of spatial structure upon visitor expenditures and the alternative forms of spatial diversification behavior consistent with such expenditure patterns.     

Do hotel REIT companies face investment constraints? A comparison with C-corporation hotel companies

This study investigates whether corporate investment by REIT hotel companies (hotel REITs hereafter) is more constrained than investment by C-corporation hotel companies (hotel C-corps hereafter). The investments of hotel REITs and hotel C-corps are examined by comparing the sensitivities of investment to cash flow and investment opportunities between the two groups. Results show that the sensitivity of investment to cash flow is positive and significantly higher for hotel REITs than for hotel C-corps, suggesting that hotel REITs are likely to experience more constraints on their corporate investment. This finding suggests that hotel firms and owners should be more cautious about electing to be a REIT if they are planning large investments in the future. In addition, this finding has policy implications; even a small reduction in the rate of mandatory dividend payouts could significantly increase hotel REITs’ corporate investments.     

SDMKD在油气资源勘探中的应用

从空间数据挖掘与知识发现(SDMKD)的内涵入手,对比分析了SDMKD与传统数据挖掘的异同,在归纳SD-MKD的任务与方法、实现过程和研究现状的基础上,对油气资源勘探SDMKD应用现状、面临的主要问题进行了总结和分析。最后,文章给出了油气资源勘探SDMKD的概念模型。     

建筑工程安全事故机会损失的确定及计算

安全事故每年都给国家、社会、企业和事故伤害人带来巨大的损失,但由于事故损失的复杂性,很难准确统计.文章为了准确统计事故损失,研究了现有的建筑工程事故损失统计体系,提出将建筑工程安全事故间接损失中机会损失纳入到建筑工程事故损失统计体系中来;定义了建筑工程事故机会损失的概念,提出了建筑工程安全事故机会损失可以细分为建筑工程事故机会损失间接经济损失和间接非经济损失两部分,并分别给出了计算方法,使建筑工程安全事故损失的确定更加全面清晰.     

创业机会的创新性、员工心理授权与企业绩效的实证研究

创业活动源于创业者对创业机会的识别,而创业机会的创新性强弱则介于模仿性机会和创新性机会之间,过往研究认为创业机会的创新性与企业绩效正相关。但心理授权理论认为员工对工作认知的不同将影响到其行为,故需考虑员工心理授权的调节作用,毕竟对创新机会的开发利用需要员工共同努力。研究发现,创业机会的创新性确实对企业绩效有显著的正向影响;而且心理授权的4个维度因子,即员工对自身能力的认知、影响力的认知、工作意义的认知以及工作自主性的认知均对企业绩效具有显著的正向影响,说明提升员工的心理授权感受将有助于提升绩效。还发现,员工对自身能力的认知、工作意义的认知以及工作自主性的认知均显著正向调节了创业机会创新性与企业绩效的关系,只有员工对自身影响力的认知的调节作用不显著。研究结论有助于从外部客观创业机会和内部员工心理授权感知两个过程看待企业绩效的提升,全面理解企业绩效的发生机制。     

新形势下陕西文化产业的发展策略

转变文化产业发展方式、扩大公众消费需求、推动中国文化资本全球化,是陕西文化产业应该抓住的历史机遇。"十二五"期间我们应该提高文化创意产业融合其他产业的能力,推进产业融合进程;与现代国际文化创意产业接轨,既能把国外文化"引进来"又能使陕西文化"走出去";提升城市传媒整合能力,促进市民消费,争取把陕西文化产业做大做强。     

邹承鲁：攀登前人没有攀登过的高峰

邹承鲁院士是我国著名的生物化学家,长期从事蛋白质结构与功能研究。他参加发起人工合成胰岛素工作,并负责胰岛素A、B两条肽链的拆合,为结晶牛胰岛素的人工全合成作出了重要贡献。他建立了蛋白质必需基团的化学修饰和活性丧失的定量关系公式,以及确定必需基团数的作图方法;提出了酶活性部位柔性假说,将蛋白质变性研究从以结构研究为主推向结构与功能密切结合的水平。本文通过梳理邹承鲁院士的几个重要科学发现,试图展示其在科研实践中所表现出的勇攀高峰、敢为人先的创新精神。     

从考古发现看中国古代的饮食文化传统

有关的考古发现是研究中国古代饮食文化的一个重要的资料来源。对于中国古代的饮食文化传统,根据现有的考古发现资料,可以从古代的烹饪技术和传统炊具、古代的厨师活动及传统食谱、直接出土的古代食物、出土的传统食具等四个方面来认识和研究。     

旅游需求函数的研究

由于旅游区价格具有一定的刚性和稳定性，采用直接观察法不易得出旅游需求函数。文章通过对旅行成本法的研究，首次提出试用旅游复合成本的变化来替代旅游区价格的变化，综合考虑收入、时间的机会成本等因素，使用出游率和旅游复合成本2个指标，建立旅游需求函数，揭示旅游需求规律，探索出一种简易可行计算旅游需求函数的方法。