基于广义交叉谱密度方法的线性和非线性格兰杰因果关系检验

鉴于现行的均值格兰杰因果关系检验或者无法检验非线性的格兰杰因果关系,或者存在“维数灾难”问题,我们利用Chung 和 Hong (2007) 的广义交叉谱方法提出了一个能统一检验线性和非线性均值格兰杰因果关系的检验统计量。我们的广义交叉谱检验统计量渐近服从一个标准正态分布,它不但能考虑所有滞后阶的信息,而且避免了“维数灾难”问题。蒙特卡罗试验结果表明广义交叉谱检验具有良好的有限样本表现。     

普惠金融对投资效率的非线性效应分析

基于湖南省2008年-2013年87个县（市）的面板数据,利用面板平滑转换模型（PSTR）,实证研究了普惠金融等因素对投资效率的非线性效应。研究发现,普惠金融发展对投资效率具有显著的非线性效应,存在明显的门限特征。在门限值前后,普惠金融发展对投资效率的影响由降低转变为提高。预算收入水平、经济发展方式、产业结构等因素对投资效率的影响因受到普惠金融发展的制约,在门限值前后也都表现出截然相反的效应;经济发展对投资效率的影响始终是正向的,只是在门限值之后,经济发展提高投资效率的速度会变缓。     

自贸区设立、贸易发展与资本流动——基于上海自贸区的研究

设立上海自贸区作为推动改革开放的极其重要的政策实验,三年来其制度创新的绩效及相关的影响效应如何？基于此,本文首先考察了自贸区设立对货物贸易进出口的差异化影响,并在此基础上进一步地实证考察了样本期内自贸区的设立对上海资本流动的影响。得到以下结论:(1)自贸区设立对货物贸易进口有显著正向影响,但对货物贸易出口则不显著,也即自贸区设立对货物贸易净进口有显著正向影响。(2)基于模糊断点回归设计和非线性双重差分模型的研究发现,自贸区设立对上海地区资本流动有显著正向影响,且企业家信心因素也影响到了资本流动。(3)通过对不同叶宽情况下非参数估计值的考察,表明标识变量的基准结果十分稳健。同时为了排除广东、天津、福建等省市的特殊性,我们采用了剔除及延长样本期的方式重新进行了检验,结果进一步证实了上述结论的可靠性。     

The impact of license regulation on the number of recreation trips: is it worth considering?

A two-stage nonlinear least-squares model (2NLS) with an endogenous treatment effect on recreation trips describes the behavior of recreationists with and without a fishing/hunting license. The proposed 2NLS is applied to the derivation of the policy-relevant average gains in the presence of an endogeneity bias to a license fee implementation program regulated by states. Recreationists who purchased a license are likely to recreate more than are the nonlicensed holders because the regulation may reduce congestions at sites where licensee visit often. The license regulation has a greater impact on the use of natural resources after controlling observed and unobserved confounders which might be correlated with the probability of being a license holder and with the final outcome, the number of recreation trips. We confirm that the individual without a permit regards the recreation trip as less valuable than does the individual having a license permit. We also found that the likelihood of purchasing a license among young adult recreationists is not at the level the states may desire. In addition, the number of trips demanded is more responsive to the nontransportation-related implicit travel cost than to the transportation-related implicit travel cost, although travel implicit costs are price inelastic.      

非线性思维视野中的可持续消费观

非线性思维为人们提供了认识复杂世界的一种新的思维范式。在思维方式上,可持续消费观超越了工业文明消费观的线性思维特征,它以一种非线性思维方式来处理和看待消费问题。可持续消费观与非线性科学所揭示的世界非线性本质是一致的,以非线性思维为基础的可持续消费观是人类消费观演变的必然归宿。     

A Metzlerian business cycle model with nonlinear heterogeneous expectations

Metzler's model is an important contribution to our understanding of the dynamics of business cycles. In his model, the production of consumption goods depends on expected future sales. However, Metzler assumes that producers are homogeneous and follow a simple expectation formation rule. Taking into account that in reality producers might not only follow several expectation formation rules, but might also even switch between them, we reformulate Metzler's original model. As it turns out endogenous business cycles may emerge within our model, i.e. changes in production and inventory are (quasi-)periodic for certain parameter combinations.     

The optimal harvesting problem with a land market: a characterization of the asymptotic convergence

We study the asymptotic behavior of the optimal harvesting policies for a multiple species forest with a land market, i.e., any fraction of the land can be traded at any time stage. We prove the existence of sustainable states and we discuss the conditions under which any optimal trajectory converges in the long run towards one of these states or towards the set of optimal periodic cycles. We also discuss briefly a more general problem that includes costs of converting land between the different species.      

房价与经济波动的区制转移——基于STAR系列模型的实证研究

本文运用平滑转移自回归(STAR)系列模型定量分析了1998-2010年间我国经济波动区制转移(Regime Transition)过程及房价波动在其中的作用。研究结果表明,我国经济在受到外生刺激时会产生跳跃冲动,但能否出现区制转移现象取决于外生刺激的持续性,单纯依靠以往经济的表现不能充分地解释这种现象;房价作为外生变量有效地解释了经济波动中存在的动态转移过程,这表明房价波动中存在着先行信息并可用于预测未来经济走向。此外,经济波动转移过程并非不可逆转,足够的反向推动力能够扭转经济势头,这使得政策干预成为可能。     

中国区域技术专业化与经济增长——基于专利数据的实证分析

基于专利数据构建技术专业化衡量指标,测度2001-2015年中国内地30个省域技术专业化系数,展现专业化模式的区域差异以及变动规律,并利用门限面板模型进一步考察不同类型技术专业化与区域经济增长之间的非线性关系。结果表明：中国省域技术分工系数总体呈现西高东低的区域特征,并出现先增后降的变化趋势;只有少数地区能在高新技术和高机会技术领域实现专业化,大部分地区仅在自身优势产业所对应的技术领域实现专业化;技术专业化与区域经济增长之间存在非线性关系,创新能力较低时,技术分工将促进经济增长,而当创新能力较高时,技术分工的作用不显著,且不同领域专业化会产生不同效果。     

Asymmetric effects of exchange rate changes on Turkish bilateral trade balances

Previous studies that have assessed the short-run and the long-run effects of exchange rate changes on Turkey’s trade balance with its major partners relied upon a linear adjustment process that could not find much support for favorable effects of exchange rate changes. In this paper, once we separate real appreciations from real depreciations via the partial sum concept and introduce nonlinearity into the estimation and testing procedure, we show that the effects of exchange rate changes are asymmetric. More precisely, while lira appreciation does not have any significant effects on Turkey’s bilateral trade balances, lira depreciation has significantly favorable effects on Turkey’s trade balance with its European partners (France, Germany, Italy, Portugal, and Great Britain).