大连市房地产开发资金来源与价格波动关系研究

基于大连市当前快速上涨的房价问题,根据大连市2004-2012年房地产开发资金来源与房地产价格数据,在利用ADF法对各个时间序列数据进行检验的基础上,运用Granger因果关系检验模型对大连市房地产开发资金来源变动与房价变动之间的因果关系进行分析,并运用灰色关联度方法对与房价有显著Granger因果关系的资金来源之间的关联度进行实证研究。研究结果显示:利用外资与房价的变化并没有直接的因果关系,大连市房地产是以其他资金来源为主,国内贷款和自筹资金对总的资金开发来源的影响处于同一水平。     

This land is your land,maybe: A historical institutionalist analysis for contextualizing split estate conflicts in U.S. unconventional oil and gas development

In the 21st century, the U.S. has experienced a boom in unconventional oil and gas development (UOGD). In part due to advances in technology, this rapid increase in UOGD has moved extraction practices into geographic areas that have previously seen little or no oil and gas development. As a result, conflicts over property rights have erupted—particularly in relation to split estate situations. To understand this controversy, we must situate it in the conditions which have shaped land use and mineral rights. We argue that past federal and state level governance decisions have created the conditions for UOGD conflicts today. Here, we utilize historical institutionalism (HI) to review the historical actors, processes, and institutions that have shaped how mineral rights have developed in the context of split estates in the U.S. We suggest that tracing this legislative and judicial history through HI is an essential foundation for exploring issues related to UOGD. Most importantly, we highlight these processes of governance as a bedrock for understanding spatial inequality inherent in current split estate law that grants the mineral estate dominance over the surface estate. We suggest that this codification of spatial inequality is problematic both in and beyond the context of split estates in UOGD.     

A meta-analysis of intercropping in Africa: impacts on crop yield,farmer income,and integrated pest management effects

Poverty and hunger in Africa are prevalent and will increase in absolute terms with population growth and continued land degradation. Therefore, there is a need for sustainable agricultural strategies, such as conservation agriculture (CA) and integrated pest management (IPM). Among CA practices, intercropping holds the promise of providing benefits to smallholders through increased crop yields and income as well as improved resource use. We review intercropping’s effects on crop yield, income, and output of IPM practices in Africa. On average, intercropping increases crop yields by 23% and gross income by 172 USD/ha, but effects vary significantly depending on management practices and agro-ecological factors. There was no evidence that yields and gross income for intercropping treatments increase when leguminous intercropping combinations, minimum/reduced tillage, pesticides, or fertilizers were utilized. Dual use of herbicides and intercropping practices garnered 1442 USD/ha more in gross income and yielded 1422 kg/ha more compared to those in conventionally managed fields, signifying the positive influence supplemental inputs can have on intercropping’s effects. Although IPM practices increased yields by 20%, on average, IPM systems integrated with intercropping yielded 24% less than IPM systems that did not. This meta-analysis indicates that intercropping is an advantageous sustainable agricultural practice, but that its effective implementation would depend on considering other factors such as adequate control of competing vegetation. There is a clear need for more scientific studies which examine intercropping’s role in complex sustainable agricultural systems, in order to understand its effects in differential environmental and socioeconomic situations and to optimize the practice’s transfer and benefits.     

创新国土资源工作促进贫困地区发展--贵州省贞丰县基层国土资源管理调研报告

贵州省贞丰县基层国土资源管理主要做法：以灵活的产业用地政策帮助百姓脱贫致富;创新环境治理与扶贫开发相结合的新路子;借助增减挂政策促进示范小城镇建设;依靠科技创新促进矿业可持续发展;通过和谐矿区建设带动资源所在地群众致富。针对该县存在的“坝区”耕地保护与经济发展之间的矛盾、土地利用效率低、矿山地质灾害防治与矿群矛盾、基层国土管理压力大等问题,建议：坚持“居住集中化、产业园区化”,缩短工业用地年限;优化保证金缴纳和返还机制;加快完善企业社会责任立法,坚持资源收益向所在地倾斜;整合资金集中解决生态和地质灾害移民搬迁;对集中连片特困地区实施差别化扶持政策。