房地产市场噪声交易行为分析——基于进化博弈理论的视角

噪声交易是房地产市场长期存在的一种现象,理性交易者与噪声交易者也长期并存于房地产市场。本文运用进化博弈理论研究房地产市场噪声交易者行为,分析噪声交易行为的复制动态,得到了理性投资者不可能利用投机行为把噪声交易者逐出市场的结论,同时给出了当博弈达到稳定均衡时选择理性交易策略和噪声交易策略的比例。     

基于进化博弈链结构的股票市场非理性泡沫测算问题研究

本文针对股市噪声不断累积,强化和排除的循环过程,基于股票市场对称进化博弈链结构模型,讨论了上海证券交易所正常情况下和极端情况下采用噪声交易策略比例的博弈进化过程和进化稳定策略,并将这个动态比例过程扩展到改进的DSSW模型中,据此测算出上证股市非理性泡沫大小.研究发现,在一定条件下,市场中的噪声交易者越多,风险资产价格非理性泡沫成分越大,波动越剧烈.本文的工作为股市泡沫的分析和测度提供了新的思路和工具.     

金融知识、财富积累和家庭资产结构

本文用中国家庭金融调查2013年数据,研究发现金融知识通过优化家庭资产组合显著促进了家庭财富积累,这表现为具有较高金融知识水平的家庭会将资产更多地配置到金融资产上,尤其是风险金融资产上;同时会降低其在非金融资产上的配置,但会提高生产经营性资产的配置.分位数回归结果表明,金融知识对低资产家庭财富积累影响更大;异质性分析结果表明,金融知识对农村地区、高年龄组和低教育水平家庭财富积累的边际影响更大.此外,基于对中国家庭金融调查2014和2015年最新季度数据的分析发现,金融知识会显著促进家庭财富增长,这进一步证实了金融知识对财富积累的积极作用.     

进化博弈论在供应商报价策略中的应用

介绍了进化博弈理论的进化稳定策略和复制动态的基本思想,并运用进化博弈理论对多个供应商的报价策略及其进化博弈均衡问题进行了深入的研究。利用研究的结果为供应商制定合理的报价机制提出了相应的对策。     

碳信用基础机制的理论分析

碳信用作为一种特殊而稀缺的有价经济资源在资本市场流通,并进一步衍生为具有投资价值和流动性的金融资产,逐渐由商品属性向金融属性过渡,体现在金融资产属性、金融资源属性、金融功能属性三个方面。在碳信用市场,价格仍是核心机制,市场均衡和均衡价格最终会形成,所有企业的边际减排成本将趋于相等,碳信用市场能够激励国家或地区企业以最低成本实现既定的减排目标。     

资本市场投资行为监管的博弈分析

伴随中国资本市场快速发展,资本市场投资主体的违规投资行为普遍存在,这是监管者与投资者博弈的结果。通过纯策略博弈均衡分析和混合策略的最优行为选择分析可以看出;投资者违规与否取决于违 规行为与合规行为的比较效用大小;在效用最大化准则下,监管达到相对满足的均衡状态是可能的,但最理想的均衡状态不可能实现。     

基于进化博弈论的产业创新网络中非核心企业演化机制研究

解密产业创新网络中非核心企业的生存之道,是诸多合作创新弱势群体的迫切需求。为此,基于进化博弈理论,构建出产业创新网络中非核心企业与核心企业之间的博弈模型,并借助 Vensim PLE软件对其进化过程进行仿真模拟,挖掘出产业创新网络中非核心企业演化路径。研究结果表明：①选择不同于彼此的创新策略,是产业创新网络中非核心企业与核心企业进化博弈的稳定策略;②各创新主体选择创新策略的初始概率,将直接决定产业创新网络进化博弈结果;③创新收益、创新成本及创新冲突收益损失的变动,会显著干扰非核心企业适应性创新策略的选择。     

行为资产定价模型综述

金融资产定价是现代资产定价研究的核心问题.本文对行为资产定价模型进行了综述,行为资产定价研究分为两个方向:一是基于消费资产定价模型(CCAPM),借用不同的效用函数来反映不同的投资者偏好,比如财富偏好,损失厌恶,习惯形成,追赶时髦,嫉妒等等.二是在进行资产定价时直接考虑投资者心理因素,基于行为金融学对投资者分析的过度自信,保守性偏差等认知偏差,用模型量化此类偏差然后利用动态规划方法求解均衡时的资产定价.     

工程咨询市场监管行为的进化博弈论分析

本文运用进化博弈论的方法,对有限理性的工程咨询市场利益相关者在监管机制下参与工程咨询行业运作,达到进化稳定均衡的进化博弈过程进行分析,并通过算例说明了政府主管部门、工程咨询协会、工程咨询公司三方相互沟通和反复博弈的动态过程,逐步实现一致性的行业发展愿望与三方最大获益目标。     

金融排斥视角下非农就业与农村家庭金融资产配置行为研究

随着农村地区非农就业比例呈增长趋势及农户收入增加,农村家庭的投资理念逐渐趋向多元化,由此产生的投资理财需求开始得到人们的关注.本文运用中国家庭金融调查(CHFS)2017年数据研究了非农就业对农村家庭金融市场参与的影响及影响机制.结果显示,户主从事非农行业可有效促进农村家庭参与金融市场,并显著提升投资性金融资产的配置水平;非农就业可以通过缓解农村家庭需求端金融排斥程度对其资产配置产生影响,并且农户的社会信任程度越高,非农就业的促进作用越强.异质性分析表明,从事非农行业对中年群体、财富收入较高群体的资产配置行为影响更加显著;户主从事第三产业或外出务工对家庭持有风险金融资产的促进作用更强,而对于户主为兼业或创业人员的家庭而言,该影响则不显著.本文基于实证结果和农村地区劳动力市场结构变化的现状,结合当前增强金融普惠性和提高直接融资比重的政策目标,提出了改善家庭资产配置的相关建议,鼓励与促进农户进一步参与金融市场,享受资本市场发展带来的红利.     

Evolutionary stable stock markets

Summary. This paper shows that a stock market is evolutionary stable if and only if stocks are evaluated by expected relative dividends. Any other market can be invaded in the sense that there is a portfolio rule that, when introduced on the market with arbitrarily small initial wealth, increases its market share at the incumbents expense. This mutant portfolio rule changes the asset valuation in the course of time. The stochastic wealth dynamics in our evolutionary stock market model is formulated as a random dynamical system. Applying this theory, necessary and sufficient conditions are derived for the evolutionary stability of portfolio rules when relative dividend payoffs follow a stationary Markov process. These local stability conditions lead to a unique evolutionary stable portfolio rule according to which assets are evaluated by expected relative dividends (with respect to the objective probabilities).Received: 7 October 2003, Revised: 18 January 2005, JEL Classification Numbers: G11, D52, D81. Correspondence to: Klaus Reiner Schenk-HoppéWe are grateful to Jarrod Wilcox and William Ziemba for valuable comments. Financial support by the national center of competence in research Financial Valuation and Risk Management is gratefully acknowledged. The national centers in research are managed by the Swiss National Science Foundation on behalf of the federal authorities.     

Internal rationality, imperfect market knowledge and asset prices

We present a decision theoretic framework in which agents are learning about market behavior and that provides microfoundations for models of adaptive learning. Agents are ‘internally rational’, i.e., maximize discounted expected utility under uncertainty given dynamically consistent subjective beliefs about the future, but agents may not be ‘externally rational’, i.e., may not know the true stochastic process for payoff relevant variables beyond their control. This includes future market outcomes and fundamentals. We apply this approach to a simple asset pricing model and show that the equilibrium stock price is then determined by investors? expectations of the price and dividend in the next period, rather than by expectations of the discounted sum of dividends. As a result, learning about price behavior affects market outcomes, while learning about the discounted sum of dividends is irrelevant for equilibrium prices. Stock prices equal the discounted sum of dividends only after making very strong assumptions about agents? market knowledge.     

Observable restrictions of general equilibrium models with financial markets

This paper examines whether general equilibrium models of exchange economies with incomplete financial markets impose restrictions on prices of commodities and assets given the stochastic processes of dividends and aggregate endowments. We show that the assumption of time-separable expected utility implies restriction on the cross-section of asset prices as well as on spot commodity prices. However, a relaxation of the assumption of time separability will generally destroy these restriction.     

Globally evolutionarily stable portfolio rules

The paper examines a dynamic model of a financial market with endogenous asset prices determined by short-run equilibrium of supply and demand. Assets pay dividends that are partially consumed and partially reinvested. The traders use fixed-mix investment strategies (portfolio rules), distributing their wealth between assets in fixed proportions. Our main goal is to identify globally evolutionarily stable strategies, allowing an investor to “survive,” i.e., to accumulate in the long run a positive share of market wealth, regardless of the initial state of the market. It is shown that there is a unique portfolio rule with this property—an analogue of the famous Kelly rule of “betting your beliefs.” A game theoretic interpretation of this result is given.     

An Evolutionary Approach to Financial Innovation

The purpose of this paper is to explain why some markets for financial products take off while others vanish as soon as they have emerged. To this end, we model an infinite sequence of CAPM-economies in which financial products can be used for insurance purposes. Agents' participation in these financial products, however, is restricted. Consecutive stage economies are linked by a mapping ('transition function") which determines the next period's participation structure from the preceding period's participation. The transition function generates a dynamic process of market participation which is driven by the percentage of informed traders and the rate at which a new asset is adopted. We then analyse the evolutionary stability of stationary equilibria. In accordance with the empirical literature on financial innovation, it is obtained that the success of a financial innovation, a mutation, depends on a sufficiently high trading volume, marketing, and new and differentiated hedging opportunities. In particular, a set of complete markets forming a stationary equilibrium is robust with respect to any further financial innovation while this is not necessarily true for a set of incomplete markets.
"There is no generally accepted theory of financial innovation, but some broad generalizations of the innovation process are possible. What matters is not the invention of a financial product or process (which is often obscure) but its diffusion through the market environment".
Ted Padolski (1987) in: The New Palgrave on Money and Finance: Financial
Innovation and Money Supply (p. 68)     

Rate‐of‐return Parity in Experimental Asset Markets*

This paper applies experimental methods to evaluate the completeness of arbitrage and rate‐of‐return parity in simultaneous asset markets in which the assets are denominated in different currencies. Two assets, which return uncertain, but known, dividends in each trading period, are traded over 20 periods, after which the asset has no value. Results indicate that risk‐neutral rate‐of‐return parity is a strong predictor of relative asset prices when assets have common expected dividends and the expected dividends have common variances. The predictive power of risk‐neutral rate‐of‐return parity is reduced as the assets become differentiated.     

Optimality in stochastic OLG models: Theory for tests

We consider general OLG economies under uncertainty, with short maturity assets and with dividend paying assets of infinite maturity and fiat money, and study the optimality properties of equilibria with a sequence of asset markets that are sequentially complete. We provide necessary and sufficient conditions, in terms of asset prices and dividends, for equilibria to be conditionally Pareto optimal. These results provide a theoretical basis for empirical investigation.     

创新型中小企业与商业银行的演化博弈及信贷稳定策略研究

创新型中小企业融资难由来已久,特别是在以间接融资为主的金融环境下如何明晰银企关系,形成与之匹配的信贷策略,是化解企业融资约束的关键。本文首先建立银企演化博弈的理论框架,对创新型中小企业与商业银行的信贷行为演化过程及演化稳定性标准进行探讨,并从创新风险与监管奖惩两个维度构建银企演化博弈模型,分析两类群体在长期信贷博弈中的演化稳定策略。结果表明,银企双方均对高收益策略有模仿倾向,但创新型中小企业在与银行的长期合作中会对少数企业的违约行为具有抵御性;研发创业期企业所受融资约束最高,当且仅当创新成功率高于最小下限时,商业银行才考虑与企业发生信贷关系;政府、信用担保等外部力量与内生要素的相互制衡对实现银企信贷稳定状态具有重要作用。     

“Overreaction” of Asset Prices in General Equilibrium

We attempt to explain the overreaction of asset prices to movements in short-term interest rates, dividends, and asset supplies. The key element of our explanation is a margin constraint that traders face which limits their leverage to a fraction of the value of their assets. Traders may lever themselves, furthermore, either directly by borrowing short term or indirectly by engaging in futures and options trading, so that the scenario is relevant to contemporary financial markets. When some shock pushes asset prices to a low enough level at which the margin constraint binds, traders are forced to liquidate assets. This drives asset prices below what they would be with frictionless markets. Also, a shock which simply increases the likelihood that the margin constraint will bind can have a very similar effect on asset prices. We construct a general equilibrium model with margin constrained traders and derive some qualitative properties of asset prices. We present an analytical solution for a deterministic version of the model and a simple numerical computation of the stochastic version.Journal of Economic LiteratureClassification Numbers: G1, E0.     

The changing role of dividends: a firm-level study from the nineteenth to the twenty-first century

Abstract .  We investigate the changes in dividend policy for one of North America's oldest banks (and Canada's first bank), Bank of Montreal, over time by considering the relationships between dividends, prices and earnings for this prominent firm. In the early part of the sample we find that annual dividend and earnings changes are highly variable, with dividend changes following changes in earnings and a larger portion of investors' returns coming from dividends. Since World War II dividend policy has been characterized by more stable and gradual increases in dividends, with more of investors' returns coming from capital gains. Overall, our results suggest that investors' perception of dividends has changed over time, allowing management to pay smaller dividends and reinvest funds in the firm.