我国现代农业发展的现状、问题与对策研究

近年来,在科技支撑和制度支持的背景下,我国的现代农业得到了长足发展,取得了举世瞩目的成绩。但是在发展过程中也出现了很多问题,例如:与发达国家相比,科技装备相对落后,现代农业人才严重短缺,金融支持力度不足,市场机制不完善等,因此深入研究现代农业具有重要的现实意义。文章首先对何为现代农业进行了详细阐述;然后分析了我国现代农业发展的现状;再次分析了我国现代农业发展中存在的主要问题;最后提出了切实可行的对策,为现代农业发展提供一些参考,促进现代农业科学发展。     

Volatility forecasting: long memory,regime switching and heteroscedasticity

In this article, we account for the first time for long memory, regime switching and the conditional time-varying volatility of volatility (heteroscedasticity) to model and forecast market volatility using the heterogeneous autoregressive model of realized volatility (HAR-RV) and its extensions. We present several interesting and notable findings. First, existing models exhibit significant nonlinearity and clustering, which provide empirical evidence on the benefit of introducing regime switching and heteroscedasticity. Second, out-of-sample results indicate that combining regime switching and heteroscedasticity can substantially improve predictive power from a statistical viewpoint. More specifically, our proposed models generally exhibit higher forecasting accuracy. Third, these results are widely consistent across a variety of robustness tests such as different forecasting windows, forecasting models, realized measures, and stock markets. Consequently, this study sheds new light on forecasting future volatility.     

Flood Risk and Salience: New Evidence from the Sunshine State

A growing literature finds evidence that flood risk salience varies over time, spiking directly following a flood and then falling off individuals' cognitive radar in the following years. In this article, we provide new evidence of salience exploiting a hurricane cluster impacting Florida that was preceded and followed by periods of unusual calm. Utilizing residential property sales across the state from 2002 through 2012, our main estimate finds a salience impact of ?8%, on average. The salience effect persists when we base estimation only on spatial variation in prices to limit confounding from other simultaneous changes due to shifting hedonic equilibria over time. These effects range from housing prices decreases of 5.4–12.3% depending on the year of sale. Understanding flood risk salience has important implications for flood insurance and disaster policy, the benefits transfer literature, and, more broadly, our understanding of natural disaster resilience. JEL Classification: Q51, Q54, R21     

生命周期评价方法及其应用

介绍了生命周期评价的目的、意义和基本方法，并运用该方法对燃煤发电、废纸造纸、废旧塑料气化发电等几种不同工业过程的环境影响进行了分析。     

谈谈情，跳跳舞

上半身保持不动．据说这样体现了西班牙人的高贵．腰胯部的扭动则来源于热情奔放的非洲。而腿脚的动作印证着印第安人的文化。     

永乐家电能否“永乐”京城

上海家电连锁大鄂永乐家电在经过两年筹划之后于6月18日正式登陆北京．开设了在北京的第一家店。永乐家电董事长陈晓说：“如果不拿下北京与广东的市场，永乐就谈不上是全国性的连锁。“陈晓的这番话让我们看出永乐进入北京的决心，但永乐究竟是“永乐”京城还是永乐自身，是包括像国美、苏宁这样大的家电连锁企业所共同关心的问题。     

农村老人的幸福生活

"没想到俺这老头子也涨'工资'了,这日子真是越过越好".东营市辛店街道茶坡村84岁的农民王道兴高兴地领取了60元的"养老月薪".如今,在辛店街道像王道兴这样享受养老补贴的老人达4821人.     

澳大利亚高等职业技术教育的管理及借鉴

澳大利亚的技术与继续教育已经形成了开放和比较完善的体系,在国际上享有一定的声誉,是其教育出口的重要内容之一。本文分析了澳大利亚高等职业技术教育管理的现状和特点,并提出了对我国的高等职业技术教育发展的一些借鉴。     

农村信用社发展的困境及纾解方案

农村信用社发展面临的障碍是:产权关系不明确,产权形式不规范;资源结构不合理;基础设施落后;结算渠道单一,汇路不畅;劳动用工制度僵化,员工素质低下.应通过深化改革,加强管理,加大政策扶植力度来解决.     

明清古村——朱家峪

从济南市区沿济王公路东行约50公里,在秀水之阳胡山之阴有一个已有600多年历史的明清古村——朱家峪。 朱家峪,现辖属章丘市官庄乡。考章丘市地名志,小村曾数易其名。明洪武初年,朱氏家族始祖朱良盛携家眷自河北枣强迁到该村。因朱是国姓,即与明太祖