Factor state–space models for high-dimensional realized covariance matrices of asset returns

We propose a dynamic factor state–space model for high-dimensional covariance matrices of asset returns. It makes use of observed risk factors and assumes that the latent integrated joint covariance matrix of the assets and the factors is observed through their realized covariance matrix with a Wishart measurement density. For the latent integrated covariance matrix of the assets we impose a strict factor structure allowing for dynamic variation in the covariance matrices of the factors and the residual components as well as in the factor loadings. This factor structure translates into a factorization of the Wishart measurement density which facilitates statistical inference based on simple Bayesian MCMC procedures making the approach scalable w.r.t. the number of assets. An empirical application to realized covariance matrices for 60 NYSE traded stocks using the Fama–French factors and sector-specific factors represented by Exchange Traded Funds (ETFs) shows that the model performs very well in- and out of sample.     

基于状态空间模型的政产学研资协同创新四螺旋影响因素实证研究

在三螺旋理论框架下，搭建政府、产业、大学、研究机构和资本部门四螺旋模型，运用文献归纳法选取多元主体协同创新6类影响因素，以主体间协同程度测度结果为因变量基础，利用状态空间模型动态分析这些因素影响方向、大小和趋势。实证结果表明，中国经济因素表现为促进作用持续提升；中国技术市场规模和创新产业规模表现为先抑制后促进，且促进作用不断提升；中国产品市场需求和创新投入表现为抑制作用持续提升；中国创新产出在时间上表现为促进作用先提升后下降并最终稳定的状态。最后，提出不同政策建议，以促进中国政产学研资协同创新体系后续发展。     

State dependence in youth labor market experiences, and the evaluation of policy interventions

We investigate the extent and type of state dependence in labor market outcomes for young low-skilled Australians. Our model allows for three labor force states, employment, unemployment and out of the labor force, and for observed and unobserved heterogeneity. We find evidence of occurrence dependence, but no lagged duration dependence. A past employment spell increases the probability of employment in the future, but the length of the spell does not matter. A past spell of unemployment undoes the positive benefits from a spell in employment. Interpretations of these effects and implications for labor market policies are discussed.     

中国货币史上的用银转变:切片、称重、入账的白银

中国的银两是称重计量的,最初被作为丝绸(用于远距离贸易的支付)的辅助性手段。元代发行官钞,面额以铜钱单位标示,但按银重计价。明代赋役征银后,大量银条从日本及南美流入中国,用于交换丝绸、瓷器以及茶叶,民间买卖日常必需品的一般交易也用白银结算。18世纪中叶,铜钱(乾隆通宝)供应量加大,并被用于本地货物买卖,银锭则用于远距离交易,与铜钱形成了互补性结构。不同于现代常识,铜钱与银锭不固定的关系以及本地商人过账时所用的称重虚银两单位,对本地经济起到了稳定作用,亦能对抗动荡的区际贸易。     

金融生态与区域经济增长的动态关系研究

金融的稳定与发展对一个国家或者地区的经济发展起着至关重要的作用。本文从金融生态的角度,利用状态空间模型研究了区域金融发展和经济增长之间的动态关系,并指出这种动态的关系更加符合现实的经济运行状况,更加深刻地反映区域金融发展与经济增长之间的规律。     

土地出让金支出结构合理化研究

为矫正土地出让金实际支出中的"重城轻农"倾向,国家相关文件原则性规定了土地出让金的五种支出方向,但并未给出各支出方向的具体比例。基于广州市土地出让金利益相关者对各支出方向相对重要性排序的495份调查问卷,采用相对熵组合赋权方法测算土地出让金各支出方向的具体比例。研究表明,土地出让金用于城市建设、支农、土地开发、征地拆迁补偿、其他支出的合理比例应分别为19.51%、21.35%、18.88%、19.15%、21.11%;其中支农支出比例最高,支农支出与征地拆迁补偿支出比例合计达40.50%,与土地出让金支出"重点向新农村建设倾斜"的政策契合。在土地出让金支出重点向新农村建设倾斜的大前提下,可制定土地出让金各支出方向比例的合理区间给地方政府预留一定的弹性操作空间;建立土地收益基金等措施维护上下届政府间的"代际公平"。要确保土地出让收益用于农民、农业、农村,还可参照目前土地复垦净收益分配方式,硬性规定土地被征收前的土地所有权人与土地使用权人占土地出让净收益的一定比例。     

A State‐Price Volatility Index for China's Stock Market

This study derives a volatility index for China's stock market with similar properties to the Chicago Board Options Exchange Volatility Index (the ‘VIX’). A long‐term benchmark of historic volatility expectations is here presented for China from 1996 to 2011, called the ‘China‐ State‐Price Volatility (SPV)’. Construction of this index involves the use of SPV methodology, using implied volatility calculated from options on the Hang Seng China Enterprise Index (HSCEI). Historic open–high–low–close volatility on the Shanghai Composite Index (SHCI) is also used to extend the benchmark prior to the availability of HSCEI options data. The China‐SPV successfully forecasts realised volatility for the Shanghai Stock Exchange. It also serves as a ‘fear gauge’ in that it monitors daily movements of the SHCI in the same way that the VIX monitors the S&P 500 index (Whaley, 2009). The China‐SPV evidences an increasing relation with the US market in terms of the dynamic correlation of levels and changes with the VIX since 2004.     

The evolution of State-Local balance sheets in the United States, 1953–2013

State and local debt in the United States more than doubled as a share of gross domestic product between 1953 and 2007. Using a historical accounting framework, we find that there is no straightforward relationship over time between state and local deficits and debt growth. We find that only 17 percent of the variation in aggregate state–local debt ratios comes from variation in the fiscal balance. This is especially true in the 1980s, the period of most rapid increase in state–local debt ratios. Before 1980, there were small but persistent deficits, but stable debt ratios. In the 1980s, state and local sectors shifted toward budget surpluses but saw rising debt ratios. This is explained by a faster pace of asset accumulation. Our results demonstrate the autonomy of balance sheet variables and suggest that changing debt ratios cannot be explained by real income and expenditure flows.     

国铁企业市场化经营机制建设探讨

建立市场化经营机制是深化铁路改革的重要方向,也是提升企业核心竞争力的迫切需要。在分析国铁企业市场化经营现状及面临问题的基础上,提出国铁企业建立市场化经营机制的总体思路,即理顺国铁企业与政府部门、国铁企业与市场、国铁集团与所属企业3个方面的关系,从进一步落实国铁企业市场主体地位、建立铁路公益性运输补贴机制、加强铁路基础设施网络建设、提升铁路运输服务质量和水平、推进铁路客货运价市场化改革、着力提升国铁资本运作能力、推进国铁资本授权经营体制改革、完善国铁现代企业制度建设等方面阐述国铁企业建立市场化经营机制的重点任务,为深化铁路改革提供参考。     

当前的财税形势及政策取向

2008年年初以来,由于国内接连发生的严重自然灾害的冲击和世界金融危机的不利影响,我国经济增长和财政收入增长呈逐季回落的态势。但从总体来看,我国经济基本面是好的,支持经济较快增长的长期因素依然在起作用。本文认为,为了防止经济出现过度下滑,宏观政策重新定位势在必行,财政政策要转为适度扩张,并加大支出结构调整力度。