Expected utility theory and prospect theory: one wedding and a decent funeral

Choice behavior is typically evaluated by assuming that the data is generated by one latent decision-making process or another. What if there are two (or more) latent decision-making processes generating the observed choices? Some choices might then be better characterized as being generated by one process, and other choices by the other process. A finite mixture model can be used to estimate the parameters of each decision process while simultaneously estimating the probability that each process applies to the sample. We consider the canonical case of lottery choices in a laboratory experiment and assume that the data is generated by expected utility theory and prospect theory decision rules. We jointly estimate the parameters of each theory as well as the fraction of choices characterized by each. The methodology provides the wedding invitation, and the data consummates the ceremony followed by a decent funeral for the representative agent model that assumes only one type of decision process. The evidence suggests support for each theory, and goes further to identify under what demographic domains one can expect to see one theory perform better than the other. We therefore propose a reconciliation of the debate over two of the dominant theories of choice under risk, at least for the tasks and samples we consider. The methodology is broadly applicable to a range of debates over competing theories generated by experimental and non-experimental data.     

Expected utility theory with imprecise probability perception: explaining preference reversals

This article presents a new model for decision-making under risk, which provides an explanation for empirically-observed preference reversals. Central to the theory is the incorporation of probability perception imprecision, which arises because of individuals’ vague understanding of numerical probabilities. We combine this concept with the use of the Alpha EU model and construct a simple model which helps us to understand anomalies, such as preference reversals and valuation gaps, discovered in the experimental economics literature, that standard models cannot explain.     

Background risk in generalized expected utility theory

Summary. In this paper, it is shown that, for a wide range of risk-averse generalized expected utility preferences, independent risks are complementary, contrary to the results for expected utility preferences satisfying conditions such as proper and standard risk aversion. Received: August 10, 2001; revised version: June 18, 2002 RID="*" ID="*"I thank Simon Grant and an anonymous referee for helpful comments and criticism. This research was supported by an Australian Research Council Senior Fellowship and Australian Research Council Large Grant A79800678.     

Knock-out for descriptive utility or experimental-design error?

Using an experimental design of stating equivalent probabilities for 252 stimulus lottery pairs, Chechile and Cooke (1997) alleged to have refuted generic-utility theory which itself comprises many modern utility theories. The present paper systematically investigates the feasibility of the Chechile-Cooke experimental design using numerical methods. We examine 1,277 utility setups (involving 17 parameter sets for four probability-weighting functions and 11 parameter sets for three component utility functions) which represent ten different utility theories. Our results demonstrate that on average for more than one third of all stimulus lottery pairs no equivalent probabilities exist. That is, the Chechile-Cooke experimental design prevents subjects from stating their true probability equivalents. Therefore, they cannot claim to have refuted generic-utility theory and the members of its family.This paper was submitted to theJournal of Risk and Uncertainty on January 14, 1999. It was, however, rejected on April 16, 1999.     

风险度量的经济学理性与风险度量方法比较

本文引入风险度量的经济学理性概念:一种风险度量方法为经济学理性的是指,这种方法对风险的度量结果与经济学中理性人对风险的排序结果相一致,采用这种方法度量风险的决策者,其决策结果也是经济学理性的。本文从风险状态下的决策理论出发,论证了在银行监管问题上,经济学理性的风险度量方法需要满足的条件。结合银行资本充足率监管的演进趋势,比较了几种重要的风险度量方法,并提出了一种经济学理性的、符合银行监管需要的风险度量方法。     

Modelling the dependency between currency and debt crises: An option based approach

The interrelation between currency and debt crises is considered in a model relying on option pricing theory. By capturing uncertainty and time aspects in this stochastic and dynamic framework we analyze parameters that determine the probabilities and dependencies of these crises.     

Mixed data sampling expectile regression with applications to measuring financial risk

To avoid information loss or measurement error in traditional methods dealing with mixed frequency data, we develop a novel mixed data sampling expectile regression (MIDAS-ER) model to measure financial risk. We construct the MIDAS-ER model by introducing a MIDAS structure into expectile regressions. This enables us to perform an expectile regression on raw mixed frequency data directly. We apply the proposed MIDAS-ER model to estimate two popular financial risk measures, namely, Value at Risk and Expected Shortfall, with both simulated data and four stock indices, and compare the model's performance with those of several popular models. The outstanding performance of our model demonstrates that high-frequency information helps to improve the accuracy of risk measurement. In addition, the numerical results also imply that our model can be a significant tool for risk-averse investors to control risk losses and for financial institutions to implement robust risk management.     

Risk Attitudes of Children and Adults: Choices Over Small and Large Probability Gains and Losses

In this paper we examine how risk attitudes change with age. We present participants from age 5 to 64 with choices between simple gambles and the expected value of the gambles. The gambles are over both gains and losses, and vary in the probability of the non-zero payoff. Surprisingly, we find that many participants are risk seeking when faced with high-probability prospects over gains and risk averse when faced with small-probability prospects. Over losses we find the exact opposite. Children's choices are consistent with the underweighting of low-probability events and the overweighting of high-probability ones. This tendency diminishes with age, and on average adults appear to use the objective probability when evaluating risky prospects.     

Regret theory and the banking firm: The optimal bank interest margin

This paper examines the optimal bank interest margin, i.e., the spread between the loan rate and the deposit rate of a bank, when the bank is not only risk-averse but also regret-averse. Regret-averse preferences are characterized by a utility function that includes disutility from having chosen ex-post suboptimal alternatives. We show that the presence of regret aversion raises or lowers the optimal bank interest margin than the one chosen by the purely risk-averse bank, depending on whether the probability of default is below or above a threshold value, respectively. Regret aversion as such makes the bank less prudent and more prone to risk-taking when the probability of default is high, thereby adversely affecting the stability of the banking system.     

Risk assessment of oil price from static and dynamic modelling approaches

The price gap between West Texas Intermediate (WTI) and Brent crude oil markets has been completely changed in the past several years. The price of WTI was always a little larger than that of Brent for a long time. However, the price of WTI has been surpassed by that of Brent since 2011. The new market circumstances and volatility of oil price require a comprehensive re-estimation of risk. Therefore, this study aims to explore an integrated approach to assess the price risk in the two crude oil markets through the value at risk (VaR) model. The VaR is estimated by the extreme value theory (EVT) and GARCH model on the basis of generalized error distribution (GED). The results show that EVT is a powerful approach to capture the risk in the oil markets. On the contrary, the traditional variance–covariance (VC) and Monte Carlo (MC) approaches tend to overestimate risk when the confidence level is 95%, but underestimate risk at the confidence level of 99%. The VaR of WTI returns is larger than that of Brent returns at identical confidence levels. Moreover, the GED-GARCH model can estimate the downside dynamic VaR accurately for WTI and Brent oil returns.     

Mathematical utility theory and the representability of demand by continuous homogeneous functions

The resort to utility-theoretical issues will permit us to propose a constructive procedure for deriving a homogeneous of degree one continuous function that gives raise to a primitive demand function under suitably mild conditions. This constitutes the first self-contained and elementary proof of a necessary and sufficient condition for an integrability problem to have a solution by continuous (subjective utility) functions.The work of José C. R. Alcantud has been supported by FEDER and Ministerio de Educación y Ciencia under the Research Project SEJ2005-0304/ECON, and by Consejería de Educación (Junta de Castilla y León) under the Research Project SA098A05. Carlos R. Palmero acknowledges financial support by FEDER and Ministerio de Educación y Ciencia under the Research Project SEJ2005-08709/ECON, and by Consejería de Educación (Junta de Castilla y León) under the Research Project VA017B05.     

个股系统流动性风险与预期回报:基于套利定价模型的检验

个股流动性变化与市场总体流动性变化的敏感程度是个股系统流动性风险。基于中国股市1994-2007年的日间交易数据,运用套利定价模型来检验个股系统流动性风险与其预期回报之间的关系后,发现中国个股系统流动性风险与预期回报之间呈现负相关关系,且这种负相关关系主要表现在市场总体流动性水平较低时以及规模较大的证券上。这一发现明显有悖于个股系统流动性风险应该获得风险溢价的标准金融模型推断,且支持了中国股市存在非流动性的财富效应。     

Pricing urban congestion: A structural random utility model with traffic anticipation

We design and estimate a game theoretic congestion pricing mechanism in which the regulator aims at reducing urban traffic congestion by price discriminating travelers according to their value of time (VOT). Travelers' preferences depend on their observable characteristics, on the endogenous amount of congestion anticipated, on their marginal utility (MU) of income and on some unobserved factors. Using a French household survey, we estimate the demand models to simulate different pricing mechanisms. We find that unobserved determinants of transportation demand are significant and are used to measure the anticipated time spent in traffic and the comfort of traveling: diverging from these expectations is felt as more discomfort than if no expectations were formed a priori. However, some of this discomfort is derived from travelers' marginal utility of income: the lost time in traffic is clearly “unpleasant” because of its opportunity cost. When the regulator and the transportation provider share common objectives, we show that a great welfare improvement can be achieved when implementing a homogenous pricing that accurately accounts for travelers VOT.     

Prospect theory in the wild: how good is the nonexperimental evidence for prospect theory?

ABSTRACT

Prospect theory is widely thought to be one of the best-confirmed accounts of human decision-making under risk. There are numerous claims in the literature that various kinds of nonexperimental, observational evidence provide strong support for prospect theory. We investigate the veracity of these claims using a set of philosophy of science morals and a careful delineation of models of choice under risk, focussing on the extant versions of prospect theory and their various components. We challenge the claim that prospect theory is well supported because it explains the equity premium puzzle. In addition, we analyse a major international survey thought to support prospect theory and argue that the support is questionable, both for statistical reasons and because the evidence itself is mixed. Our analyses highlight some important ideas in the philosophy of science and caution against strong claims about support for prospect theory that rely on nonexperimental, observational evidence.     

Behavioural economics: Classical and modern

Abstract

In this paper, the origins and development of behavioural economics, beginning with the pioneering works of Herbert Simon and Ward Edwards, are traced and (critically) discussed. Two kinds of behavioural economics – classical and modern – are attributed, respectively, to the two pioneers. The mathematical foundations of classical behavioural economics are identified, largely, to be in the theory of computation and computational complexity; the mathematical basis for modern behavioural economics is claimed to be a notion of subjective probability. Individually rational economic theories of behaviour, with attempts to broaden – and deepen – the notion of rationality, challenging its orthodox variants, were decisively influenced by these two mathematical underpinnings.     

The cross section of international government bond returns

Volatility risk, credit risk, value effect, and momentum are major return drivers in the fixed-income universe. This study offers a four-factor pricing model for international government bonds. The model thoroughly explains the variation of government bond returns and covers a range of more than 60 cross-sectional return patterns in government bond markets, verifying its usefulness for asset pricing. The research was conducted within a sample of bonds from 25 developed and emerging markets for the years 1992 to 2016.     

Utility of gambling II: risk,paradoxes, and data

We specialize our results on entropy-modified representations of event-based gambles to representations of probability-based gambles by assuming an implicit event structure underlying the probabilities, and adding assumptions linking the qualitative properties of the former and the latter. Under segregation and under duplex decomposition, we obtain numerical representations consisting of a linear weighted utility term plus a term corresponding to information-theoretical entropies. These representations accommodate the Allais paradox and most of the data due to Birnbaum and associates. A representation of mixed event-and probability-based gambles accommodates the Ellsberg paradox. We suggest possible extensions to handle the data not accommodated.      

Value of information analysis in healthcare: a review of principles and applications

Background:

Economic evaluations are increasingly utilized to inform decisions in healthcare; however, decisions remain uncertain when they are not based on adequate evidence. Value of information (VOI) analysis has been proposed as a systematic approach to measure decision uncertainty and assess whether there is sufficient evidence to support new technologies.

Scope:

The objective of this paper is to review the principles and applications of VOI analysis in healthcare. Relevant databases were systematically searched to identify VOI articles. The findings from the selected articles were summarized and narratively presented.

Findings:

Various VOI methods have been developed and applied to inform decision-making, optimally designing research studies and setting research priorities. However, the application of this approach in healthcare remains limited due to technical and policy challenges.

Conclusion:

There is a need to create more awareness about VOI analysis, simplify its current methods, and align them with the needs of decision-making organizations.     

企业跨境风险投资海外技术探索：双重劣势与投资策略——基于科技型企业多案例分析

企业跨境风险投资（Cross—borderCorporateVentureCapital,简称跨境CVC）是指企业以知识搜寻和技术投资为导向的海外冒险活动,对在位企业创新活力提升、组织韧性增强及国际竞争力跃迁起重要作用。然而,在进行海外技术探索时,跨境CVC面临来自东道国制度环境和目标技术领域的双重外来者劣势,如何通过合理的投资安排应对双重劣势,对于跨境CVC价值实现格外重要。基于实物期权理论,对跨境CVC活动决策过程和投资逻辑进行研究,以英特尔、Alphabet、联想和百度4家科技型企业跨境CVC活动为研究样本进行案例分析,从投资单元、投资伙伴、技术领域、投资区位、投资阶段和投资信息披露等维度归纳双重外来者劣势应对策略。研究结论有助于丰富外来者劣势概念内涵并拓展实物期权理论应用场景,打开科技型企业跨境CVC过程“黑箱”,为我国企业跨境CVC战略规划与实施提供理论依据和实践指导。     

中国农民专业合作社多元发展格局的理论解释——基于间接定价理论模型和相关案例的分析

在运用间接定价理论模型对当前中国农业经营主体多样化的现状进行统一的理论解释后,本文将农民专业合作社发展的外部环境纳入模型分析,并应用案例对以农业经营主体为内核的农民专业合作社的发展格局进行了实证研究。研究表明：农民经纪人、农业合作组织、农业龙头企业等农业经营主体的出现是在农业生产与农业经营分工状态下（即专业化经济大于分工所产生的交易费用的状态下）各市场主体比较中间产品、最终产品和不同类型劳动的交易效率后选择不同的剩余权利赖以实现的最优组织结构的结果;农民合作组织、农业龙头企业这两类农业经营主体依托其外部环境发展出农民专业合作社;而兼业小农在这种农民专业合作社发展格局中注定是被盘剥的对象。