基于时间距离的河南城市经济联系及其空间结构

采用GIS网络分析获得城市间公路交通的OD时间距离对引力模型的距离进行修正,对河南各地市间1997年和2007年的经济联系进行测算和比较,继而采用分形模型对各城市对外经济联系总量及联系强度的分形维数进行测算,探讨了地市对外经济联系的空间结构特征.研究表明,河南各城市经济联系总量等级特征明显,地市间经济联系初步形成了“十...     

新冠肺炎疫情下管理层业绩预告归因行为研究

基于A股上市公司2020年1—4季度业绩预告归因的研究发现,公司将业绩变化归因于新冠疫情的概率呈现随季度下降的趋势,坏消息归因于新冠疫情的概率显著高于好消息,且这种差异未随季度发生显著变化。业绩预告归因反映了管理层自利性归因与新冠疫情的叠加影响,且在特定情境下投资者能够识别自利性归因。研究结论从微观经济主体和利益相关者感知的角度展示了中国抗击新冠疫情的成效,也为监管部门规范重大外生冲击下的信息披露操纵行为提供了借鉴。     

When Do Analysts Adjust for Biases in Management Guidance? Effects of Guidance Track Record and Analysts’ Incentives

Prior research indicates that analysts do not fully adjust for the general downward bias in earnings guidance issued by management. We report the results of two experiments designed to investigate how guidance track record and analysts’ incentives jointly explain the extent to which analysts adjust for guidance bias. Our results suggest that analysts with accuracy incentives adjust for management’s track record of downwardly biased guidance when the bias is relatively small (one cent), but those with relationship incentives do not. Furthermore, the difference in adjustment is larger when the bias track record is inconsistent than when it is consistent. Also, when guidance bias is larger (two cents) relative to smaller (one cent), analysts with relationship incentives partially adjust, as they appear to strike a balance between accuracy and their desire to please management. These findings hold implications for investors, regulators, and the interpretation of prior research.     

热电联产单元机组的自适应控制

本文对单元机组自适应控制提出模型修正和快速参数跟踪二级自适应控制方式,确定了跟踪步骤和计算公式,给出了仿真结果。     

Does the financial analysts' usage of non-financial information influence the analysts' forecast accuracy? Some evidence from the Belgian sell-side financial analyst

This paper examines whether the use of non-financial information by sell-side financial analysts influences the accuracy of analysts’ forecasts. The research findings, based on a survey of Belgian financial analysts, suggest that financial analysts who use more forward-looking information and more internal-structure information offer more accurate forecasts. Furthermore, the listed Belgian firms examined in this study have improved their non-financial information reporting over time. However, neither the frequency nor the quantity of non-financial information mentioned by financial analysts in their reports appears to have increased over time.     

Analyst following and count-data econometrics

This paper reexamines the determinants of the number of analysts following a firm using econometric models based on count distributions. We replicate Bhushan's (1989) analyst-following study to demonstrate the effects of using count-data econometrics, in lieu of OLS, in studying phenomena where the dependent variable ranges among nonnegative integers. In contrast with the original paper, our findings indicate the number of institutional investors is inversely related with analyst following. We also provide econometric evidence to support the preferred use of the negative binomial model in estimating cross-sectional, analyst-following regressions.     

航空经济发展的金融需求分析--基于“供给领先”和“需求跟随”的金融发展理论

帕特里克论证了金融体系在提高存量资本和新增资本配置效率、加速资本积累中的作用,提出了“供给领先”和“需求跟随”的金融发展理论。基于产品生命周期理论,我们将航空经济的发展阶段界定为形成期、发展期和成熟期。在形成期,金融支持模式主要是由政府主导的“供给领先型”模式,金融需求主要有基础设施建设资金需求,航空产业长远发展的资金需求,吸引企业入驻资金需求,以及已入驻企业的研发资金需求;在成长期,“需求跟随型”金融支持开始占据主导,主要的金融需求有生产、生活设施建设的资金需求,企业规模化生产的资金需求,航空型人才培训的资金需求;在成熟期,以市场主导的“供给领先型”金融支持又将航空经济发展推向一个更高的阶段,此时的金融需求主要包括企业转型升级的资金需求,企业技术创新的资金需求,以及保障企业长远发展的资金需求。     

A comparison of buy‐side and sell‐side analysts

There is very little research on the topic of buy-side analyst performance, and that which does exist yields mixed results. We use a large sample from both the buy-side and the sell-side and report several new results. First, while the contemporaneous returns to portfolios based on sell-side recommendations are positive, the returns for buy-side analysts, proxied by changes in institutional holdings, are negative. Second, the buy-side analysts' underperformance is accentuated when they trade against sell-side analysts' recommendations. Third, abnormal returns positively relate to both the portfolio size and the portfolio turnover of buy-side analysts' institutions, suggesting that large institutions employ superior analysts and that superior analysts frequently change their recommendations. Abnormal returns are also positively related to buy-side portfolios with stocks that have higher analyst coverage, greater institutional holding, and lower earnings forecast dispersion. Fourth, there is substantial persistence in buy-side performance, but even the top decile performs poorly. These findings suggest that sell-side analysts still outperform buy-side analysts despite the severe conflicts of interest documented in the literature.     

分析师能发现审计合谋吗？--基于我国上市公司的经验证据

以异常审计收费作为审计合谋的代理变量,研究分析师是否能发现审计合谋行为。研究发现,分析师跟踪人数会随异常审计费用的增加而显著减少,这说明分析师能觉察到审计合谋可能带来的风险,并通过放弃跟踪该公司的方式向市场传递信息;进一步研究发现,分析师对上市时间较长的公司,以及民营上市公司的异常审计费用更为敏感,跟踪数量下降较为明显。     

How does investor relations disclosure affect analysts' forecasts?

We study the relationship between investor relations disclosure and analyst forecast properties in Australian firms, a setting dominated by small firms with limited analyst coverage and requiring continuous disclosure of price sensitive information. We find increasing disclosure in the time period investigated is associated with greater accuracy in firms disclosing fewer items. Disclosure was unrelated to forecast dispersion, possibly due to the low analyst following. In periods of uncertainty, the investor relations awards effectively discriminated quality from quantity of disclosure. These findings highlight the importance of active communication with analysts, particularly in firms providing less disclosure and during periods of uncertainty.