浅析B2C商城的内部风险控制模式的确立

近年来,B2C电子商城多次出现价格标错等异常事件发生,对企业的声誉、经营及利润等带来很大的危害。为此,文章中提出根据电子商务企业的实际情况,建立一套相对完整、有效地内部风险控制模式。该内部风险控制模式主要包括人员管理控制、系统可靠性控制、流程控制及应急管理控制等四个方面的内容,从多个方面入手,努力降低突发异常事件对电子商务企业带来的伤害。     

Measuring the liquidity part of volume

Based on the concept that the presence of liquidity frictions can increase the daily traded volume, we develop an extended version of the mixture of distribution hypothesis model (MDH) along the lines of Tauchen and Pitts (1983) to measure the liquidity portion of volume. Our approach relies on a structural definition of liquidity frictions arising from the theoretical framework of Grossman and Miller (1988), which explains how liquidity shocks affect the way in which information is incorporated into daily trading characteristics. In addition, we propose an econometric setup exploiting the volatility–volume relationship to filter the liquidity portion of volume and infer the presence of liquidity frictions using daily data. Finally, based on FTSE 100 stocks, we show that the extended MDH model proposed here outperforms that of Andersen (1996) and that the liquidity frictions are priced in the cross-section of stock returns.     

What is the major determinant of cross-border banking flows?

This study examines the major determinant of cross-border credit flows through global banks across 70 countries. Employing a Bayesian dynamic latent factor model, we decompose volatilities of banking flows into the contribution of a global common factor, regional common factor, and country-specific factor. The results indicate that the global and regional common factor explains about 40–50 percent of volatility in overall cross-border banking flows. In particular, the contribution of the global common factor increased in the 2000s. Simultaneously, main determinants are largely heterogeneous across countries: this implies that the desirable policy response to credit inflows may differ for each host country.     

Are there pre-programme effects of active placement efforts? Evidence from a social experiment

This note estimates pre-programme effects of active placement programmes. Estimation is based on a social experiment conducted in three Swedish counties in 2004. I find that placement programmes could substantially increase transitions both to jobs and other exits before programme start.     

Regime-switching factor models in which the number of factors defines the regime

We develop regime-switching factor models in which the number of factors determines the operative economic regime. To illustrate the proposed methodology, we analyze the covariance structure of a widely studied set of 25 equity portfolios.     

Allocative efficiency measurement with endogenous prices

In the nonparametric measurement of allocative efficiency, output prices are fixed. If prices are endogenous, the overall output in the market determines the allocative efficient point. We develop an alternative semi-nonparametric model that allows prices to be endogenously determined.     

On adding over-identifying instrumental variables to simultaneous equations

Reducing the number of over-identifying instruments, or adding them to a structural equation, increases estimation dispersion. Added instruments should be insignificant under correct specification, with parameter estimates nearly unaffected, confirmed by Monte Carlo. Selecting instruments does not affect these results.     

Does employment before marriage exert autonomy after marriage? Evidence on female autonomy from India

This paper examines the determinants of female autonomy using data from India. We model female autonomy for movement as well as economic decision-making using a summative index approach. Our contributions to the literature include a careful examination of the regional differences, tests of economic and sociological hypotheses on female autonomy and the use of pre-marriage autonomy measures in terms of employment status to determine post-marriage autonomy. Our results suggest that economic, sociological and pre-marriage autonomy factors explain female autonomy. Regional differences regarding the economic, sociological and pre-marriage autonomy factors play a role in determining female autonomy.     

浅谈在C++教学中快速实现从结构到OOP程序设计思想的转变

本文从具备C语言基础的初学者在学习面向对象程序设计过程中所碰到的实际问题出发,通过对教学过程中遇到的问题进行反思,在如何使得学生快速的从结构化程序设计思想转化到面向对象程序设计思想这个比较难的问题上重新进行探讨,展示了实例操作教学法、问题驱动教学法在面向对象程序设计教学过程中的一些具体运用,通过理论思考并结合自身的专业知识和教学经验找到一种比较新颖而且行之有效的教学方法。     

News shocks or parametric indeterminacy? An observational equivalence result in linear rational expectations models

This paper studies identification in linear rational expectations models with news shocks. We show that news-driven models and indeterminate equilibrium economies with i.i.d. fundamentals are observationally equivalent. This finding calls for carefully designing empirical investigations of news shocks in estimated DSGE models.