Intra-metropolitan shifts in labor demand and the adjustment of local markets

I offer new evidence on the adjustment of local labor markets to geographic shifts in labor demand within US metropolitan areas using a unique data set in which metropolitan subregions are geographically matched across the 1970–1980 and 1980–1990 decades. The evidence uncovered paints the following picture. Workers, especially those with less education, make incomplete adjustments within metropolitan areas in response to intra-metropolitan demand shifts. Although blacks may not make especially limited adjustments, they have disproportionately suffered deleterious effects from job movements because the demand shifts have tended to be away from their places of residence.     

产品市场竞争与现金价值:掠夺理论还是代理理论

本文利用2000～2009年沪深两市上市公司的非平衡面板数据来考察产品市场竞争与现金价值之间的关系。检验结果表明,比行业竞争对手持有更多现金的企业具有较高的价值,垄断程度较高的行业企业所持现金的价值更高。基于倾向得分理论的检验结果表明垄断性行业子样本的现金价值显著高于竞争性行业子样本。进一步的检验结果表明成长性、市场化程度和现金持有量的区间效应因素并不影响文章的研究结论。这些实证结果都支持了掠夺理论的分析。     

Camouflaged Indicators of Earnings Management†

Abstract

We argue that, in response to increased scrutiny and greater attention to accruals versus sales, firms become more likely to engage in accrual conversion (AC) cash management aimed at aligning cash and accruals with earnings and sales (e.g. by factoring of receivables). In doing so, they reduce the statistical power of standard indicators of accrual-based earnings management – in effect, camouflaging their earnings management activity. This proposition is of interest because many influential papers on earnings management have utilized accrual-based indicators to reach their conclusions. Our results indicate that firms indeed became more likely to engage in AC cash management after the passage of the Sarbanes-Oxley Act (SOX), and that this tendency was particularly pronounced among firms with strong incentives (or enhanced ability) to perform and hide earnings management. In particular, our findings suggest that the post-SOX decrease in standard measurements of accrual-based earnings management, identified in prior research, is partially attributable to firms’ increased engagement in AC cash management activity.     

城市本土文化的发掘与发扬对城市发展的促进作用

全球化是人类社会发展的必然,在全球化过程中,城市受到巨大的冲击.全球化背景下城市的发展存在趋同与求异两种趋势,并且两种趋势并重.世界潮流,浩浩荡荡,顺之才昌,我们只有趋同,才能更好融入世界,才能获得更快发展;同样越是自然的才越是人类的,越是民族的才越是世界的,我们只有求异,才能在发展过程中不迷失自我,不盲目随从,才能获得更好发展.在具有五千年辉煌灿烂的文明史的泱泱大国,雄厚的文化底蕴是我们最大的瑰宝,充分挖掘城市的本土文化,将之应用到城市发展规划中去,指导城市发展,是我们义不客辞的责任.我国有众多历史文化名城保护不善,或年久失修,或因为建设性破坏而面目全非,失去了其\"历史真实性、生活真实性、风貌完整性\",亟待整治.只有充分挖掘文化内涵、保持优良传统,达到历史与现代的完美融合,才是城市的最佳发展.     

A Case Study on Analysis of the Stylistic Features of News Coverage

With the guidance of discourse analysis, this paper attempts to explore the stylistic features of news coverage with concrete example from angles of global and local analysis, aiming at promoting people's knowledge of news coverage style and furthering understanding of it.     

FDI占中国固定资产投资比重变动的倒U形特征与决定因素实证分析

1979～2008年,FDI进入占中国年度固定资产投资总额比重的变动过程,呈现显著的倒U形变动特征。1979～2000年前后,FDI占中国年度固定资产投资比重显著上升,起促进作用的因素主要是国有企业和集体企业劳动就业人口比重相对下降,税收政策优惠,以及对外贸易开放度提高。2002～2008年,FDI占中国年度固定资产投资比重显著下降,起关键作用的因素主要有中国高等教育入学率提高,以及中国加入WTO后对外贸易壁垒下降。此外,本文还就FDI占中国年度固定资产投资比重变动的决定因素分不同地区进行了实证研究。     

One-step R-estimation in linear models with stable errors

Classical estimation techniques for linear models either are inconsistent, or perform rather poorly, under α$\alpha$-stable error densities; most of them are not even rate-optimal. In this paper, we propose an original one-step R-estimation method and investigate its asymptotic performances under stable densities. Contrary to traditional least squares, the proposed R-estimators remain root-n$n$ consistent (the optimal rate) under the whole family of stable distributions, irrespective of their asymmetry and tail index. While parametric stable-likelihood estimation, due to the absence of a closed form for stable densities, is quite cumbersome, our method allows us to construct estimators reaching the parametric efficiency bounds associated with any prescribed values (_α0,_b0)$({\alpha }_0,b_0)$ of the tail index α$\alpha$ and skewness parameter b$b$, while preserving root-n$n$ consistency under any (α,b)$(\alpha ,b)$ as well as under usual light-tailed densities. The method furthermore avoids all forms of multidimensional argmin computation. Simulations confirm its excellent finite-sample performances.