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1.
为了更加深入研究土地使用权出让行为,利用博弈及风险理论,提出了土地使用权挂牌出让中竞价人的出价策略,通过分析证明挂牌出让能使各竞价人的出价更为理性,为合理配置城市土地资源提供了新的研究思路;同时也指出挂牌出让中更易滋生腐败。利用杭州市和北京市土地出让结果说明了挂牌出让是目前土地使用权出让的主要方式,分析了产生这一现象的原因。  相似文献   

2.
城市土地使用权挂牌出让中竞价人的理性分析   总被引:2,自引:1,他引:2  
为了更加深入研究土地使用权出让行为,利用博弈及风险理论,提出了土地使用权挂牌出让中竟价人的出价策略,通过分析证明挂牌出让能使各竞价人的出价更为理性,为合理配置城市土地资源提供了新的研究思路;同时也指出挂牌出让中更易滋生腐败.利用杭州市和北京市土地出让结果说明了挂牌出让是目前土地使用权出让的主要方式,分析了产生这一现象的原因.  相似文献   

3.
    
Strategic priorities are assessed tor the agricultural research system in Zimbabwe in a situation characterized by multiple objectives, farm types, and agro-ecological zones. Economic surplus analysis is used to rank research programs by commodity and research program areas in total and disaggregated by large and small larms in high and low potential regions. No funding, current funding, and 50% more funding are allowed tor each program in the analysis. An optimal research portfolio is developed, first with all weight placed on efficiency, and second with increasing weights placed on benefits going to small-holder farmers. Even with no additional weight placed on small holders. lesearch programs for both small farms and low potential areas enter into the optimal research portfolio. As more emphasis is given to small holders, the reduction in overall efficiency gained due to research is relatively modest, Maize and cotton were the highest ranked commodity research programs of the 36 commodities considered for both large and small larms. Agronomy and soils research are relatively more important for small holders, while plant breeding and crop protection are relatively more important for large-scale farmers. priority selling: Economic surplus and mathematical programming analysis.  相似文献   

4.
[目的]种养业协调发展是促进我国农业供给侧结构性改革的重要方面。文章以大兴安岭农垦的种养业结构优化为研究对象,针对大兴安岭农垦种养业结构发展失衡等问题,构建了基于种养业协调发展的多目标线性规划模型。[方法]根据Matlab编程求解,模拟提出了该地区的种养业优化方案,并阐明了促进种养业协调发展的对策措施。[结果](1)通过优化调整,大兴安岭农垦种养结构得到优化,与2013~2015年平均相比,粮食作物种植面积减少2.26万hm~2,经济作物种植面积增加了1.97万hm~2,其中大豆种植面积减少1.16万hm~2,玉米种植面积减少1.96万hm~2,养殖业饲养规模大幅度增加,其中猪的养殖数量增加5.89倍,牛增加16.62倍,羊增加1.57倍,家禽增加了10.2倍。(2)通过优化调整,与2013~2015年平均水平相比,种养业综合效益显著提升,提高了48.81%,其中经济收益增加了93.92%,社会效益减少了6.06%,生态效益提高了6.13%,其中总化肥施用量减少13.15%,总作物需水量减少5.74%、相对生态价值降低0.77%。[结论]为进一步推进大兴安岭农垦种养业结构调整,迫切需要加强宣传,探索种养业结合发展新模式,加快废弃物处理新技术推广,制定扶持政策,促进种植业和养殖业形成良性循环。  相似文献   

5.
本文初步应用博弈论分析方法,在强调个人和政府(社会)理性矛盾基础上,研究分析公共水资源 ,强强联合“共制水价” ,水资源保护中的信号博弈 ,水资源保护中规则设计等问题,建立相应的分析模型,提出了解决问题的建议。  相似文献   

6.
邢建辉 《现代食品》2022,28(1):155-158
本实验通过紫外分光光度法测定海带中碘含量,研究了浸泡时间对淡干海带碘含量的影响。结果表明,淡干海带经淡水浸泡后会损失大部分碘,浸泡10 min后,会损失80%的碘,随着浸泡时间的延长,碘的损失量增加。浸泡0.5 h以上,海带含碘量随时间的加长变化幅度减小,保持在较低值。浸泡1 h后会损失91%的碘,并基本保持不变。为减少海带中碘的损失,淡干海带在食用前浸泡时间应少于10 min。  相似文献   

7.
This paper contributes to the contentious topic of whether shocks to agricultural commodity prices are permanent or transitory. This is an important issue with regards to forecasting, economic modelling of agricultural prices and risk management. Past studies have not accounted for important characteristics of agricultural prices that matter when testing whether shocks to prices are permanent or transitory. These include the presence or absence of a deterministic trend, the possible break in the trend, non‐stationary volatility, and the problem of the initial deviation of commodity prices from their long‐run mean or trend. We conduct a comprehensive test that incorporates all these characteristics known to plague agricultural commodity prices. Though the conclusion is mixed, the balance is in favour of agricultural price shocks being permanent in nature. This result departs from the general view that in theory, agricultural prices should be stationary, suggesting that the controversy of whether shocks to agricultural prices are temporary or permanent is not yet over.  相似文献   

8.
    
Summary

The reality of limited data ensures that both econometric‐based valuation and forecasting are inadvisable. A linear programming approach involves some redefinition of the problem, the valuation, the forecast, optimality and the relevance of particular comparable sales. It can incorporate qualitative, and interaction, property characteristics. The whole analysis should be presented so that data, methodology and client advice are explicitly stated.  相似文献   

9.
运用博弈论的方法,分析我国矿产资源补偿费在征管过程中出现的截留、挪用以及不按有关规定及时、足额缴纳矿产资源补偿费等违法违规行为。通过分析指出产生这些违规行为的主要原因,并提出相应的解决措施。  相似文献   

10.
从主要利益相关者看国有林场改革   总被引:1,自引:0,他引:1  
在国有林场改革发展中,从主要利益相关者的角度分析在改革推进过程中所遇到的动力和阻力因素,从而完善动力机制构建;同时也利用博弈理论的研究方法,分析国有林场改革主要利益相关者之间利益的博弈关系,并根据Nash均衡策略的最优解,给出了国有林场改革的建议。  相似文献   

11.
联合国气候变化大会是目前全球范围内最为重要的气候环境会议之一,其关注的重点是参与国的碳排放谈判和碳限制。基于博弈的思想,构建出一个气候大会碳排放谈判的博弈模型。并基于该模型,采用中国的相关数据来解释目前的谈判现状。结果发现,这一模型符合IPCC对发展中国家的要求。其次根据对比结果可知,中国目前在碳排放博弈中尚未完全掌握主导权。建议中国在全球碳排放谈判中要坚持以单位GDP碳排放作为减排指标,同时动态调整减排目标和路径。  相似文献   

12.
博弈论思想下的庇古税理论模型分析   总被引:1,自引:0,他引:1  
在对博弈论思想指导下的庇古税模型加以分析后,运用对比分析方法,对庇古税模型、古诺双足寡头竞争模型、斯坦克尔伯格模型以及20世纪以后一些学者的研究成果加以比较,指出后来者在原有的经典模型基础上考虑了开征庇古税对企业带来的负效应,从而丰富了庇古税模型的理论含义。  相似文献   

13.
    
Value at Risk estimated with joint distribution methodologies demonstrates that risk is lower for portfolios of real estate investment trusts (REITs) and small-business equities compared with a single-asset holding. Benefits from diversification were largest in 2001–2003 and the smallest from 2006–2008.

Previous research using Value at Risk points out the importance of model selection. Various estimation approaches affected results modestly over the entire period (1989–mid 2008). The Value at Risk is -3.1% for two copula models and -3.2% for a nonparametric empirical joint density, at a 1% probability level for weekly returns. After June 1996, the nonparametric copula model consistently returned the lowest risk estimate among the three joint distribution methods.

Time-varying risk is a more important driver in the results than model specification. The highest portfolio risk was found for the period after August 2006 (weekly losses of 4.4% to 5%). The distribution-based model results were closer to the undiversified model results than in the earlier time periods, which supports the premise that contagion across asset classes characterises the post-2006 real estate bust, but is not a strong characteristic of the market over a longer investment horizon that includes growth phases of the business cycle.  相似文献   

14.
    
Summary

The use of linear programming valuation implies an underlying acceptance of efficient market pricing. Comparables are sample evidence and, therefore, a valid methodology requires an inferential basis. Small sample sizes and multicollinearity are not determining issues in preventing the use of a statistical methodology. Given the reality of learning by experience, an appropriate methodology should formally, and explicitly, modify subjective views with new observed information.  相似文献   

15.
农村土地流转市场失灵的博弈分析   总被引:9,自引:0,他引:9  
以市场为取向的经济体制改革,使我国农村经济的市场化程度有了明显的提高.但作为农村市场瓶颈的农村土地市场还不成熟,在发展中存在着许多问题.随着市场经济的不断发展,市场机制在资源配置中的基础性作用日益明显的表现出来,解决好农村土地市场问题尤为重要.通过运用博弈模型分析农村土地市场失灵问题,并结合目前的状况,从完善价格机制、合理分配利益、健全中介机构、加强国家宏观管理、制定相关法律法规等几个方面提出了促进我国农村土地市场发展的建议.  相似文献   

16.
    
Norway maintains a complex system of activity or type specific coupled payments which account for a large share of farm income. Most of the payment rates are negatively related to farm size and are higher in remote areas compared to central regions. We present and use a newly developed recursive‐dynamic multi‐commodity model (Agrispace) with CES production functions depicting regional farm clusters derived from the full farm population. Using this model, we simulate impacts of current and alternative subsidy policies on production, prices, input use, income and farm structural change. Mapping cluster results to each farm along with behavioural rules allows estimation of individual profits and farm exits. Our results indicate that, in the short run, the current policy regime seems to support the policy objective of maintaining a variety of farms in all parts of Norway. In the long run, farm structural change is less affected by a policy reform that leaves total support levels unchanged.  相似文献   

17.
从生态补偿的角度,在对拉市海退耕还林项目进行社会调查的基础上,利用博弈工具分析了政府、上下游社区在退耕还林中的收益变化,在参与退耕还林项目后农户的产业选择及政府的政策选择,揭示了退耕还林在保护流域环境方面的局限性,提出在生态补偿思路下进行流域环境保护的建议。  相似文献   

18.
黑龙江省农业结构优化的多方案分析   总被引:1,自引:0,他引:1       下载免费PDF全文
该文在确定了农业发展约束条件的基础上,以2005年为基期,建立了黑龙江省2010年农业结构的线性规划模型,同时针对黑龙江省农业结构现状和宏观环境的影响,提出了3种侧重点不同的结构调整方案,并进行优化分析,为制定农业结构调整政策提供具体的数量参考。  相似文献   

19.
随着我国城市化、工业化的加速发展,大量农村土地被征用,在这一过程中引发的征地补偿问题也引起了社会各界和学术界的关注.从博弈论的角度,通过分析农村土地征收中失地农民和地方政府之间的利益关系,得出了促使纳什均衡结果合理化的因素变动关系,为我国农村土地征收补偿制度改革提出了建议.  相似文献   

20.
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