资本市场的实验经济学方法论研究

随着金融市场理论研究和实践检验的不断发展，资本市场的许多基础理论受到了极大的挑战，与现有理论相悖的异象不断涌现。新近兴起的实验经济学为人们研究资本市场提供了一条更为有效的途径。本文分析了实验方法在资本市场研究中的利与弊，介绍了部分资本市场实验的设计过程，并应用该方法分析了风险与收益、资本市场的效率、市场泡沫的产生和破灭、CAPM理论，以及交易制度等。文章指出，在资本市场中运用实验方法进行研究，具有可控性、可比性以及可重复性等优点，为我们对于资本市场诸多理论进行检验提供了可能。在资本市场实验的设计中，我们不但需要考虑实验的各种交易制度，还需要考虑到被试人员的选择、交易资产的确定以及市场信息的设计等很多问题，只有对这些问题进行全面地考虑，才能保证实验结果的可信度，进而为我们对于各种金融理论的检验提供可能。     

Which stock exchanges are more attractive? The competition analysis of listing and trading performance

With the globalization of capital markets, stock exchanges around the world have faced their most challenging era since 2005. While the traditional role of the stock exchange should evolve by enforcing competitive advantage, as the heart of modern capital markets, stock exchanges give rise to both capital demand outflows and capital supply inflows, and both of these have to be taken into consideration. What is it that makes some stock markets more attractive than others from the viewpoint of firms as well as from the viewpoint of investors? This paper focuses on the stock exchanges' performance from an international perspective by combining both the listing competition and trading competition aspects using data for the world's 45 largest stock exchanges. The exchange-specific performances that both take and do not take a country's specific financial regulatory regime into consideration are evaluated. In addition, a competition matrix is designed to help the managerial authorities of stock exchanges around the world to position themselves within the industry.     

The political economy of expulsion: the regulation of Jewish moneylending in medieval England

This paper develops an analytic narrative examining an institution known as ‘The Exchequer of the Jewry’. The prohibition on usury resulted in most moneylending activities being concentrated within the Jewish community. The king set up the Exchequer of the Jewry in order to extract these monopoly profits. This institution lasted for almost 100 years but collapsed during the second part of the thirteenth century. This collapse resulted in the expulsion of the Anglo-Jewish population. This paper provides a rational choice account of the institutional trajectory of the Exchequer of the Jewry. This account explains why it ultimately failed to provide a suitable framework for the development of capital markets in medieval England.     

An Alternative Post-Keynesian Framework for Understanding Capital Flows to Emerging Markets

This article contributes to the establishment of a framework for the analysis of international capital flows, with a specific focus on emerging markets. It is based on a “monetary” analysis of the economy, as well as on the works of Hyman Minsky and Jan Toporowski in particular. The key aspects of such an approach are the following. First, in a monetary economy, capital flows need to be understood as “flows of funds” that pertain to the realm of financial choices, as opposed to the traditional understanding of capital flows as based on “real” variables, such as saving and investment. A consequence of this is the need to focus on gross flows rather than capital flows. Second, liquidity preference considerations also apply at the international level, particularly in relation to the liquidity of emerging-market currencies that, in turn, depends on context-specific “Keynesian fundamentals.” Third, the rise of institutional investors is the key historical development in the financial system, shaping the current reality of cross-border capital flows, including to emerging markets. I argue that institutional investors’ liabilities, in light of the theories of Minsky and Toporowski, are one of the most important variables in determining these investors’ portfolio choices. I synthesize these elements by defining capital flows to emerging markets as the demand for emerging-market assets by institutional investors. I propose a framework to categorize the various channels that guide this demand.     

Sequential Markets: An Experimental Investigation of Clower's Dual-Decision Hypothesis

Countless experimental studies have shown that markets converge quickly and efficiently to the competitive outcome under many trading institutions, particularly the double auction mechanism. This creates difficulties for Keynesian stories of unemployment creation—which suggest a noncompetitive outcome in an essentially competitive world. Such stories were popular in the late 1960s and 1970s. One of these stories—the dual decision hypothesis of Clower—was seen then as the beginning of a story of unemployment. This article reports the results of an experiment designed to test this hypothesis. Specifically, we set up an experiment in which there are two sequential double-auction markets, in the first of which one good (labour) is traded, after which the second market (goods) is opened and the second good traded. We compare the outcome of our experiment with that of the competitive theory. One general finding is that not enough trade takes place in the two markets. In other words, the usual finding that competitive equilibrium is achieved in double-auction markets is not replicated in this sequential setting. This revised version was published online in August 2006 with corrections to the Cover Date.     

HAVE INSTITUTIONAL INVESTORS DESTABILIZED EMERGING MARKETS?

In the past few years, there has been a large increase in portfolio capital flows into emerging markets, mostly fueled by mutual funds and other institutional investors. Based on a simple variance ratio test, this paper finds that emerging stock markets as a group experienced a sharp increase in autocorrelation in total returns at a time when institutional investors began to expand significantly their holdings in these markets. These results are consistent with the view that institutional investor sentiment toward emerging markets as an asset class can at times play a critical role in determining asset prices, with shifts in sentiment resulting in periods of bubble-like booms and busts and asset price overshooting.     

An analysis of the consumption risk and asset returns of Chinese residents

The research on the consumption-based asset pricing theory is limited to the developed capital markets. This paper seeks to extend the research to the Chinese developing capital market. It analyzes the dynamic relationship between the Chinese residents’ consumption, stock market returns and interest rates with the CCAPM. According to the analyses of this paper, the IV regression results are mixed. However, the data can fit the model relatively well, and the empirical results fail to reject the model. Thus, the results show that a relationship between the Chinese residents’ consumption growth rates and the asset returns does indeed exist, and that the consumption volatility risk could influence the asset returns.     

市场分割下中国股市反馈交易实证研究——来自A股、B股和H股市场的经验证据

文章在行为资本资产定价模型(BCAPM)的基础上,通过借鉴Watanabe(2002)的方法,建立了GJR-GARCHM(1,1)-M模型,充分考虑中国股票市场处于分割状态的现状,使用基本覆盖A股、B股和H股市场全部交易历史的市场指数日收盘价数据,对A股、B股和H股市场的反馈交易行为进行研究和比较,结果显示:A股和B股市场都存在显著的正反馈交易效应,反馈交易行为主要取决于波动率水平和市场涨跌两个因素;与成熟股票市场类似,H股和红筹股市场的正反馈交易行为不显著;A股市场的反馈交易行为受市场涨跌因素影响更大,而B股市场的反馈交易行为主要由波动率水平决定;深市比沪市更容易出现正反馈交易者主导市场的现象。文章的研究不仅对行为资本资产定价理论的成立提供了经验性证据,而且对投资经理的实践操作和政策制定者的监管调控都具有一定的参考价值。     

A theoretical analysis of institutional investors' trading costs in auction and dealer markets

This paper compares trading costs for institutional investors subject to liquidity shocks, in auction and dealer markets. The batch auction restricts the institutions' ability to exploit informational advantages because of competition between institutions when they simultaneously submit orders. This competition lowers aggregate trading costs. In the dealership market, competition between traders is absent but private information is revealed by observing the flow of successive orders and so reduces aggregate trading costs. We analyse the relative effects on trading costs of competition and information revelation in the two systems and derive a parameter inequality which determines which system has lower costs.     

Regulating Insider Trading In Betting Markets

Although trading in securities in conventional financial markets on the basis of inside information is restricted by law, the rules against such trading in betting markets are rather more ambiguous. It is argued in this paper that, since insider trading in betting markets imposes a cost on the great majority of bettors, tighter strictures against such trading would benefit all but the insiders. This case is supported by the use of empirical evidence which shows that betting markets which are characterized by tighter controls against insider activity are also characterized by a significantly lower incidence of such activity.     

Abuse of EU Emissions Trading for Tacit Collusion

In this paper, we show that loopholes in EU emissions trading law foster tacit collusion that impacts oligopolistic product markets. The abuses originate from the covert misuse of EU emissions trading institutions, such as pooling or project-based mechanisms. We analyse two types of these loopholes by means of game theoretical methods to show how oligopolistic firms establish output restrictions, even if those firms are price takers on the~permit market (which might actually be the case for the majority of obligated firms in the EU). The identified misuse of emissions trading law increases firms’ profits, decreases the consumers’ surplus and has negative effects on social welfare for specified parameter ranges. Consequently, public authorities should not allow emissions trading’s overall good reputation—based upon its efficient abatement of pollution—to blind them to options in European emissions trading legislation that would eventually restrict competition.      

我国证券市场正反馈交易的实证检验

正反馈交易是投资者依据证券t-1期收益高低决定其第t期买卖行为的一种交易策略,这种交易策略广泛存在于世界各国的证券市场中,使证券市场表现出超常的波动性。本文使用上证指数和深证指数对我国证券市场的正反馈交易进行了实证研究,结果显示我国证券市场同样存在显著的正反馈交易现象,这种现象降低了市场的稳定性。     

Inducing liquidity in thin financial markets through combined-value trading mechanisms

Asset pricing theory hypothesizes that investors are only interested in portfolios; individual securities are evaluated only in terms of their contribution to portfolio risk and return. Yet, standard financial market design is that of parallel, unconnected markets, whereby investors cannot submit orders in one market conditional on events in others. When markets are thin, this exposes them to substantial execution risk. Fear of ending up with unbalanced portfolios after trading may even keep investors from submitting orders, further eroding liquidity and the ability of markets to equilibrate. The suggested solution is a portfolio trading mechanism referred to as combined-value trading (CVT). Investors are allowed to submit orders for packages of securities and the system matches trades and computes prices by optimally combining portfolio orders in an open book. We study the performance of the CVT mechanism experimentally and compare it to the performance of parallel, unconnected double auctions in experiments with similar parametrization and either a similar number of subjects or substantially thicker markets. We present evidence that our portfolio trading mechanism facilitates equilibration to the extent that the thicker markets do. Inspection of order submission and trade activity reveals that subjects manage to exploit the direct linkages between markets enabled by the CVT system.     

Distance and beyond: What drives financial flows to emerging economies?

A major theme in the empirical literature is whether country-specific ‘pull’ or external ‘push’ factors drive international capital flows. In this paper we show that pull-push interactions matter: the response of international investors to country-specific developments depends on global volatility/liquidity stress conditions. We model asset-trade behaviour of investors: with limited information, strong institutional quality ‘pulls’ asset demand; mounting tensions in global markets amplify portfolio adjustments. We derive an empirically testable equation for cross-border bank flows to emerging economies (EMEs) and focus on pull-push interactions that trigger financial vulnerabilities. We find that global volatility amplifies demand for institutional quality, prior to the recent crisis, implying that EMEs with weak institutional settings are exposed to sharp capital retrenchments. In the aftermath of the crisis, the liquidity easing in advanced economies drives down concerns for EMEs' developments, boosting flows and challenging EMEs' ability to use capital controls to mitigate unbridled flows.     

Fundamentals, information, and international capital flows: A welfare analysis

In the recent discussion surrounding the design of a new international financial architecture, enhancing transparency has widely been proposed as a policy essential for increasing the efficiency of international capital markets. This paper uses a simple two-country (two-agent) general equilibrium model with incomplete markets and production to explore the welfare consequences of an increase in public information about country-specific fundamentals (increase in transparency). An improvement in the quality of information has two effects on the ex ante welfare of individual countries: A direct effect that increases the efficiency of global capital allocation and welfare, and an indirect general equilibrium effect that increases asset price volatility and may decrease welfare. When the degree of risk-aversion is low, at least one country will gain from an increase in information quality. If the degree of risk-aversion is high, then there are robust examples of economies for which an increase in information hurts all countries. The paper also discusses how certain institutional arrangements (international derivative markets, international agency) could ensure that all countries gain from better information by providing insurance against information-induced asset price risk.     

Control rights,competitive markets,and the labor management debate

Labor-managed firms are often asserted to display perverse short-run behavior and defective investment incentives. These criticisms rely upon assumed departures from the neoclassical framework of complete and competitive markets, including restricted trading in worker memberships. This paper treats management by capital and by labor as special cases within a common analytical setting, and shows that there is no basis for distinguishing between these two principles of organizational design in a competitive-market environment: capital can be collectively owned by a labor-managed firm without undermining investment incentives. Future debate should thus center on identification of pertinent market failures.     

Differences in the degree of unionization as a source of comparative advantage in open economies

This paper considers two integrated countries that differ only in their labour markets: one country hosts unions, whereas the other one pays competitive wages. These institutional differences are a source of comparative advantage, which crucially impact inter‐industry trade and welfare in the open economy. In this setting, deunionization exerts opposing welfare effects in the two economies. Increasing product market competition is beneficial for the unionized country and detrimental for its trading partner. Finally, we conduct an empirical analysis that provides strong support for the main hypotheses of our theoretical model.     

Financial Structure and Corporate Behavior in Japan and the US: insulation versus integration with speculative pressures

This paper examines the impact of speculative financial markets on corporate behavior under the Japanese and US financial systems. While both countries experienced speculative financial booms during the 1980s, real sector corporate decision making was relatively insulated from such activity in Japan by its bifurcated capital markets: high-turnover trading of much equity coexists with another segment in which large blocks of firms equity and debt are held long term, by capital suppliers who are strategic business allies. In the American system, in contrast, fluid and impersonal stock trading leaves firms vulnerable to the impact of short term price movements. This avenue for speculative financial market pressures has militated toward reduced time horizons and financial ratio-based decision criteria in the US corporate sector. The main implication is that mechanisms must be found for insulating American corporate decision making from speculative pressures. Rather than attempting to mimic the undemocratic role played by banks and other buysiness insiders in Japan, US policy makers should achieve a similar insulating effect by vesting more power in corporate constituences other than shareholders—especially employees. An approach built around ‘democratic stakeholder governance’ is proposed.     

内幕交易的经济学分析

本文探讨了中国市场的内幕交易理论,在此基础上提出了4个可检验的假说:(1)内幕交易在中国必定存在;(2)内幕交易在中国比成熟市场更加严重;(3)重大事件中内幕交易的严重程度和管理层付出呈正比关系;(4)内幕交易多围绕利好消息。利用1078个并购重组事件和其他上市公司重大事件为样本,本文运用事件研究法,证实了上述假说。在此基础上,提出了中国内幕交易立法和监管的思路。     

Innovation Systems,Institutional Change And The New Knowledge Market: Implications For Third World Agricultural Development

This paper uses a simplified version of classical information theory to improve understanding of the dynamic potential of innovation systems in developing countries with a special focus on issues of agricultural poverty. Using examples drawn from emergent knowledge markets in industrialised countries, the paper suggests that such an analytical approach focuses attention directly on the types of institutional reforms necessary to improve the effectiveness of Third World agricultural R&D. Contrast is made with more conventional approaches that take institutional structures as given and focus more on factors such as price regimes, policy weaknesses and political will. The paper argues that so great now are the problems in this area (particularly in Sub-Saharan Africa) that there is a clear need for institutional reform to accompany relevant technological changes. In the absence of such reform innovative (and hence economic) potential is likely to be compromised.