结构突变对实证估计方法选择的影响：以人民币汇率为例

本文在详细归纳结构突变的单位根检验方法基础上,以2002—2007年间人民币汇率为例探讨了结构突变对于模型估计方法选择的影响。采用结构突变的单位根检验方法得到的检验结果否定了不考虑结构突变的传统ADF检验结果,揭示出人民币兑日元汇率时间序列为结构突变的平稳序列。本文结论表明,是否考虑结构突变将会导致对估计方法作出截然不同的选择,不考虑结构突变可能会带来“伪协整”问题。     

A Bayesian Model Comparison for Trend‐Cycle Decompositions of Output

We compare a number of widely used trend‐cycle decompositions of output in a formal Bayesian model comparison exercise. This is motivated by the often markedly different results from these decompositions—different decompositions have broad implications for the relative importance of real versus nominal shocks in explaining variations in output. Using U.S. quarterly real GDP, we find that the overall best model is an unobserved components model with two features: (i) a nonzero correlation between trend and cycle innovations and (ii) a break in trend output growth in 2007. The annualized trend output growth decreases from about 3.4% to 1.2%–1.5% after the break. The results also indicate that real shocks are more important than nominal shocks. The slowdown in trend output growth is robust when we expand the set of models to include bivariate unobserved components models.     

世界大国增值税类型选择的规律——以美国、印度和欧盟为例

本文认为,世界各国尤其是国土面积最大的几个国家,在打破税制路径依赖的过程中,在认识和采纳消费型增值税过程中,面对国内维持现状的政治和经济因素的强大影响,增值税改革的决策是异常痛苦的过程。美国迄今为止未实行增值税,印度的增值税改革也未能在全国范围内铺开,欧盟作为增值税改革的成功实践者,其改革进程也充斥着政策妥协与延期实施。本文通过对世界大国增值税类型选择规律的分析,有助于我们重新认识中国增值税转型改革的路径和方案,权衡各方面利益,保证改革在曲折中前行。     

On the Credibility of the Euro/Swiss Franc Floor: A Financial Market Perspective

We estimate the risk‐neutral break probabilities of a realignment of the EUR/CHF 1.20 floor, maintained by the SNB from September 6, 2011, to January 15, 2015, using put options and an option pricing model, which assumes a lower barrier for the exchange rate. We estimate probabilities considerably different from zero, even when the exchange rate traded far above the floor. We observe a drastic increase in the break probabilities up to approximately 50% shortly before the floor was abandoned. From an option market perspective, the credibility of the SNB in maintaining the floor was, thus, substantially lower than publicly claimed.     

Is there life in the old dogs yet? Making break-tests work on financial contagion

Many tests of financial contagion require a definition of the dates separating calm from crisis periods. We propose to use a battery of break search procedures for individual time series to objectively identify potential break dates in relationships between countries. Applied to the biggest European stock markets and combined with two well established tests for financial contagion, this approach results in break dates which correctly identify the timing of changes in cross-country transmission mechanisms. Application of break search procedures breathes new life into the established contagion tests, allowing for an objective, data-driven timing of crisis periods.     

How much do plant guarantees reduce perceived risk?

Abstract

Consumers do perceive risk in purchase decisions and seek to reduce both uncertainty and probability of loss. Risk also varies across persons and purchasing situations. Retailers promote product guarantees as risk reducers, but the quantitative evidence is lacking. They offer guarantees to help resolve outcomes from post-purchase problems mainly, product performance. We used an online survey to investigate the role of risk mitigation by money-back guarantees (MBGs) on a live product: plants. We obtained online responses from 504?US residents?≥?age 18 years who had made at least one live plant purchase in the six months prior to the study. As MBG length increased, perceived risk (PR) decreased. PR was higher for men than for women and declined as income increased. Subjects with a higher level of product involvement, expertise, delight, repurchase intentions, and regret had a higher level of PR. We conducted separate Chow tests for annual and perennial plants by price and MBG length and found several break points. As price increased from $5 to $10, a 30-d MBG reduced PR for annual plants while the reduction in PR was incrementally decreased for all guarantee lengths when annuals were priced over $20. With perennial plants, the MBG had an increasingly larger effect on reducing PR for each $10 increase in price. Overall, for each day increase in MBG length, we observed a 0.0337 decrease in PR, which meant that a 90-d MBG on a plant would reduce PR by 3%. This quantitative evidence of reduction in PR should encourage the use and communication of MBGs which have the potential to improve purchases, customer retention, and profitability.     

上市首日“破发”股票长期表现更差吗？

以2009年7月至2012年5月间上市发行股票为样本,采用随机前沿模型进行定价分析,以新股发行定价类型,首日发行抑价率正负进行分类.选取折价发行且上市首日"破发"(即首日收盘价低于发行价)公司样本,将其与溢价发行且上市首日未"破发"公司样本,按照"行业-收入规模"标准进行样本配对,计算两组公司上市后1~5年买入与持有收益(BHAR)并进行差异性检验.结果表明:新股上市后前三年均表现不佳,折价发行且首日"破发"的股票在上市后前两年表现更差.这为新股定价与长期表现相关研究提供了新的实证.     

Instability of return prediction models

This study examines evidence of instability in models of ex post predictable components in stock returns related to structural breaks in the coefficients of state variables such as the lagged dividend yield, short interest rate, term spread and default premium. We estimate linear models of excess returns for a set of international equity indices and test for stability of the estimated regression parameters. There is evidence of instability for the vast majority of countries. Breaks do not generally appear to be uniform in time: different countries experience breaks at different times. For the majority of international indices, the predictable component in stock returns appears to have diminished following the most recent break. We assess the adequacy of the break tests and model selection procedures in a set of Monte Carlo experiments.     

Bustup Takeovers of Value-Destroying Diversified Firms

We examine whether the value loss from diversification affects takeover and breakup probabilities. We estimate diversification's value effect by imputing stand-alone values for individual business segments and find that firms with greater value losses are more likely to be taken over. Moreover, those acquired firms whose losses are greatest are most likely to be bought by LBO associations, which frequently break up their targets. For a subsample of large diversified targets: (1) higher value losses increase the extent of post-takeover bustup; and (2) post-takeover bustup generally results in divested divisions being operated as part of a focused, stand-alone firm.     

Mean reversion of short-run interest rates: empirical evidence from new EU countries

This article deals with the analysis of the mean reversion property of short-term interest rates in Central and Eastern European countries, using daily data from January 2000 to December 2008. For this purpose, we use long memory (fractionally integrated) models, and employ non-parametric, semi-parametric and parametric techniques to check if our results are robust across different methods. The results indicate that the mean reversion only takes place in the case of Hungary. For the remaining countries, the short-term interest rates are clearly non-stationary and non-mean reverting. Allowing for one break in the data, the break date takes place about 2001/2003 in all the series except in Lithuania, where the break occurs in 2007. In general, we observe an increase in the degree of dependence after the break in the majority of the series.     

Real exchange rate adjustment in European transition countries

In single-equation tests, real exchange rates show mean reversion for nine of 10 Central and Eastern European transition countries for the period January 1993 to December 2005. Because of the shift from controlled to market economies and accompanying crises, failed policy regimes and changes in exchange rate regimes, unit root tests for transition countries often require allowance for structural changes. Accounting for structural breaks gives substantially faster mean-reversion speeds than those found for major industrialized countries. These fast adjustment speeds are plausible: Transition countries had perhaps 10 years to make unprecedented adjustments required for accession to the European Union. A number of papers have applied non-linear models to the Central and Eastern European countries. This paper investigates four non-linear models and compares them with piece-wise linear break models. The break models appear superior in detecting mean reversion for the Central and Eastern European transition countries.     

Wage Structures in the Private and Public Sectors in West Germany

In this paper, we investigate pay structures in the private and public sectors for West Germany. We commence by describing some basic features of the public sector. We use micro-data from the German Socio-Economic Panel for the years 1984–93 to analyse developments and differences in public and private sector wage distributions for both males and females. We break wages down into different education groups and age-groups, and use regressions to construct conditional wage differentials. Our results differ in many aspects from findings for the UK. For instance, we find that although mean wages are higher in the public sector for both males and females, conditional wages are higher in the private sector for all education groups for males, but higher in the public sector for females. JEL classification: J3.     

Value for money: a broken piñata?

In public management a key driver of effectiveness is value for money (VfM). This paper argues that the VfM concept suffers from conceptual ambiguity, and thus ethical implications arise when VfM is used to legitimize public buying decisions. A conceptual framework, which clarifies properties and boundaries of VfM, is proposed. Empirical data collected from public employees involved in public procurement in Ireland and a perceptual map of subjective meaning and impact of VfM are discussed. While the conceptual framework is broadly supported, it highlights different interpretations of VfM and distinguishes those employees who dent the VfM piñata from those who break it. The implications of the research in this paper include a need for more debate concerning the usefulness of the VfM concept.     

汉语拒绝言语行为的跨性别差异

跨性别拒绝言语行为是一个复杂的现象。旨在讨论在拒绝异性的请求、邀请和建议时,男性和女性所使用的不同拒绝模式;并通过问卷调查以及对调查结果进行的分析进一步论证,由于生理、心理、社会环境等因素,女性在实施拒绝言语行为方面要比男性委婉而礼貌;只有在拒绝异性所提供的帮助时,男性比女性更委婉。     

Quantile regression estimates and the analysis of structural breaks

The paper considers a test for structural breaks based on quantile regressions instead of OLS estimates. Besides granting robustness, this allows us to verify the impact of a break in more than one point of the conditional distribution. The quantile regression test is then repeatedly implemented as a diagnostic tool to uncover partial or spurious breaks. The test is also implemented to measure the contribution of each explanatory variable to the instability of the regression coefficients, thus finding which one of the different possible sources of breaks linked to the nature of the explanatory variables is the most effective. A real data example of exchange rates shows the presence of a time-driven break, but only at the lower quartile, while the analysis of the explanatory variable excludes its involvement in the break. Since the asymptotic distribution of the OLS test for structural change depends on i.i.d. normal errors and on the exogeneity of the explanatory variables, a Monte Carlo study analyses the behavior of OLS and quantile regression tests for structural changes with lagged endogenous variables, non-normal errors, spurious or partial breaks, and misspecification.     

Is it one break or ongoing permanent shocks that explains U.S. real GDP?

The relative importance of permanent versus cyclical shocks to GDP has been found to depend on the presence or absence of a single break in mean growth. We estimate unobserved components models conditional on a trend break having occurred in any specified quarter and use the Bayesian model averaging to combine the conditional estimates. We estimate a break occurred around 2006:1. Allowing for a break significantly reduces estimates of trend variance. However, enough spread remains in the posterior distribution to indicate that available data does not definitively settle the question of the relative importance of trend versus cycle.     

Circuit theory of banking and finance

Drawing on monetary circuit theory, this study develops an approach to analyze the integrated functions of banking and finance in a monetary production economy. The study proposes a micro-founded, circuit-sequenced model of a decentralized-decisions economy, where production, exchange, and investment from households and firms are integrated through money creation and funds allocation operated, respectively, by banks and non-bank financial intermediaries. The model is used to draw implications on: the special nature of banks and the role of non-bank financial intermediaries; the relationship between saving and investment; and the channels through which finance may cause the circuit process to break down. The study also discusses how the circuit approach can be used for an integrated analysis of economic and financial structural change.     

Leadership development in the age of the algorithm

By now we expect personalized content--it's routinely served up by online retailers and news services, for example. But the typical leadership development program still takes a formulaic, one-size-fits-all approach. And it rarely happens that an excellent technique can be effectively transferred from one leader to all others. Someone trying to adopt a practice from a leader with a different style usually seems stilted and off--a Franken-leader. Breakthrough work at Hilton Hotels and other organizations shows how companies can use an algorithmic model to deliver training tips uniquely suited to each individual's style. It's a five-step process: First, a company must choose a tool with which to identify each person's leadership type. Second, it should assess its best leaders, and third, it should interview them about their techniques. Fourth, it should use its algorithmic model to feed tips drawn from those techniques to developing leaders of the same type. And fifth, it should make the system dynamically intelligent, with user reactions sharpening the content and targeting of tips. The power of this kind of system--highly customized, based on peer-to-peer sharing, and continually evolving--will soon overturn the generic model of leadership development. And such systems will inevitably break through any one organization, until somewhere in the cloud the best leadership tips from all over are gathered, sorted, and distributed according to which ones suit which people best.     

基于非参数检验的商业银行资产价格多变结构点研究

准确判断商业银行资产价格的变化规律是商业银行风险评估和预警的前提。以改进的多变结构点非参数检验方法为基础,实证检验2007~2013年上市商业银行资产价格的变结构点,结果表明:商业银行资产价格在样本期产生了多个均值变结构点和方差变结构点,且系统因素、行业因素和商业银行特质因素均可能会导致商业银行资产价格变结构点的出现。     

Termination fees in a 'bright line' jurisdiction

We seek to statistically inform the debate regarding the Australian Takeovers Panel's ‘bright line’ policy towards break fees. Based on 313 takeovers from 2002 to 2006, 85 involving break fees, we find post‐bid competition to be unrelated to break fee usage and inversely related to bid success. We also find that break fee usage has a detrimental effect on shareholder wealth as measured by both the final bid premium and abnormal returns. Therefore, although break fees appear to be neither anticompetitive nor coercive within the Australian context, they do appear to have had a deleterious effect on shareholder wealth.