Temporal variance of revealed preference on-street parking price elasticity

This paper utilises revealed-preference parking trend data from parking meters ex ante and ex post of a general 50% price increase in the hourly cost of on-street parking to estimate the on-street parking price elasticity of demand in an area of Dublin, Ireland. Estimates are presented for the aggregate price elasticity of demand level and individual estimates for specific time periods and days of the week. In terms of reduced parking frequency, the average price elasticity of demand reported is −0.29. Daily average estimates are consistent, with one notable exception being Thursday, a ‘late night shopping’ day for which a lower price sensitivity is reported. Morning periods are also shown to be more responsive than other time periods in the test area, indicating some potential for influencing morning inbound peak traffic levels.     

Gender,Low-Paid Status,and Time Poverty in Urban China

ABSTRACT

Using synthetic data from the 2008 China Time Use Survey (CTUS) and the 2008 China Household Income Project (CHIP), this study estimates time-poverty rates and compares the profiles of time-poor men and women workers in urban China. In line with previous research, time poverty is defined as a lack of enough time for rest and leisure. Three time-poverty measures are adopted. By all three measures, women paid workers and low-paid workers account for a disproportionate share of the time poor. Regression analysis further shows that, other things being equal, workers who are women, low-paid, married, and who live with children or the elderly in counties with higher overtime rates and lower minimum wage standards are more likely to be time poor. Simulations indicate that enforcing working time regulations and raising minimum wage standards could be effective for reducing time poverty.     

Career duration in the NHL: pushing and pulling on Europeans?

Using a panel of National Hockey League players from 2000 through 2013, we analyse the determinants of career length in the league. In our analysis, we include both performance variables and nationality of origin to determine their importance in determining career length. We find that European-born players have shorter careers than North American-born players holding performance constant and Russian-born players have even shorter careers than other Europeans. We further find that Russian-born players have even shorter careers than other players after the 2005 lockout. These shorter careers are consistent with both exit discrimination against European and Russian players who are pushed out of the league as well as voluntary exit by European and Russian players who are pulled out of the league due to opportunities in their home countries.     

专利市场化视角下校企发明专利维持时间影响因素比较研究

专利市场化水平通过对专利权人预期收益率的影响与专利维持时间产生联系。对高校和企业发明专利维持时间及其影响因素进行比较,可为提升高校专利市场化水平提供借鉴。从专利市场化视角出发,以华为和华南理工大学（以下简称“华工”）为例,运用回归分析方法对发明专利维持时间影响因素进行研究。结果发现,华为发明专利维持时间较长,且在审查时间、发明人数和权利要求数方面存在较大差异;各自变量对二者发明专利维持时间的解释力度亦有区别。为提升高校专利市场化水平,提出应强化知识产权创造市场导向、优化发明专利性质布局、强化发明专利专业属性、促进校企科研合作等合理化建议。     

Quantile cointegrating regression

Quantile regression has important applications in risk management, portfolio optimization, and asset pricing. The current paper studies estimation, inference and financial applications of quantile regression with cointegrated time series. In addition, a new cointegration model with quantile-varying coefficients is proposed. In the proposed model, the value of cointegrating coefficients may be affected by the shocks and thus may vary over the innovation quantile. The proposed model may be viewed as a stochastic cointegration model which includes the conventional cointegration model as a special case. It also provides a useful complement to cointegration models with (G)ARCH effects. Asymptotic properties of the proposed model and limiting distribution of the cointegrating regression quantiles are derived. In the presence of endogenous regressors, fully-modified quantile regression estimators and augmented quantile cointegrating regression are proposed to remove the second order bias and nuisance parameters. Regression Wald tests are constructed based on the fully modified quantile regression estimators. An empirical application to stock index data highlights the potential of the proposed method.     

Consistent estimation of a general nonparametric regression function in time series

We propose an estimator of the conditional distribution of X_t|X_t−1,X_t−2,…, and the corresponding regression function , where the conditioning set is of infinite order. We establish consistency of our estimator under stationarity and ergodicity conditions plus a mild smoothness condition.     

年报与第一季报披露时间间隔异常上市公司盈利状况研究——来自上市公司2004年至2008年第一季度的经验证据

我国上市公司年报与第一季报的披露时间底线同为4月30号,存在上市公司年报与第一季报披露时间间隔异常的现象,本文以2004年至2008年第一季度连续存在的上市公司为样本,比较分析了年报与第一季报披露时间间隔在一周之内的上市公司,与披露时间间隔在一周之外的上市公司的盈利水平和盈利质量。结果表明,年报与第一季报披露时间间隔异常的上市公司的盈利水平和盈利质量都显著低于其他上市公司,并对这类上市公司的监管和投资策略提出了建议。     

危险化学品泄漏事故的混沌动力学特性分析

为探讨如何有效地预防和控制危险化学品泄漏事故,运用混沌理论方法对焦作市某化工厂泄漏事故统计数据进行了时间序列分析和R/S分析,指出危险化学品泄漏事故具有明显的混沌特性。分析和讨论了危险化学品泄漏事故的混沌特性,并对后续短期内可能发生的事故进行了预测。     

Ethnic segmentation in leisure time activities in Estonia

This paper examines the differences between the leisure time activities of members of the minority and majority populations of Estonia. Because people only meet when they undertake similar activities, it is important for social cohesion to identify the kinds of activities that different ethnic groups engage in during their free time. The data for this study were obtained from the Estonian Time Use Surveys of 2000 and 2010. In this paper, we analyse rates of participation in various cultural events, entertainment activities, outdoor recreation and sport. Our analysis reveals important ethnic differences in almost all leisure activities that partly stem from the uneven distribution of minorities over settlement types. Less than half of the differences relate to socio-economic status and individual wealth. The rest of ethnic segmentation in leisure activities can be attributed to preferences, differential residential patterns of ethnic groups over Estonia’s regions and the feeling of being a stranger in leisure time places where other ethnic groups are already over-represented.     

基于上证指数的标准差系数时间序列预测模型分析

证券市场的风险可以通过很多种方式测度出来,其中,稳定性是衡量股票市场风险程度的一个重要的指标,而对于稳定性的度量主要是通过方差的计算来实现的。所以通过预测方差就可以提供另一种描述股票市场未来风险的方式。本文通过对上证指数2009年3月到2012年1月每月的全部交易日收盘价的标准差系数进行研究,运用ARIMA时间序列技术,得出预测模型,对未来的标准差系数进行了预测。