Utility Models and Prospect Theory
http://lists.repec.org/mailman/listinfo/nep-upt
Utility Models and Prospect Theory
2020-05-25
On the Existence of Positive Equilibrium Profits in Competitive Screening Markets
http://d.repec.org/n?u=RePEc:gla:glaewp:2020_02&r=upt
We assume a fixed number of symmetric firms, competition in prices, constant returns to scale and frictionless consumer choices. Consumers differ in their preferences and profitability (e.g., due to heterogeneous risk aversion and loss probabilities), which creates adverse selection. Firms can offer multiple contracts to screen individuals, in equilibrium and in any deviation. We show that equilibrium profits vanish if each consumer has a unique optimizing bundle at equilibrium prices or, more generally, if there exists a linear ordering over of contracts that dictates the preferences of firms whenever consumers are indifferent between multiple optimal contracts. For instance, equilibrium profits vanish if the marginal rate of substitution of quality for price is sharper for profit than for utility. In particular, profit also vanishes if utility equals the sum of (negative) profit, and a surplus (eg, due to risk aversion). We provide examples of economies where there exists an equilibrium with strictly positive profit and show that these examples are robust (hold for an open set of economies).
Yehuda John Levy
Andre Veiga
Perfect Competition, Equilibrium, Screening
2020-01
Short-Term Investments and Indices of Risk
http://d.repec.org/n?u=RePEc:arx:papers:2005.06576&r=upt
We study various decision problems regarding short-term investments in risky assets whose returns evolve continuously in time. We show that in each problem, all risk-averse decision makers have the same (problem-dependent) ranking over short-term risky assets. Moreover, in each problem, the ranking is represented by the same risk index as in the case of CARA utility agents and normally distributed risky assets.
Yuval Heller
Amnon Schreiber
2020-05
Continuous time mean-variance-utility portfolio problem and its equilibrium strategy
http://d.repec.org/n?u=RePEc:arx:papers:2005.06782&r=upt
In this paper, we propose a new class of optimization problems, which maximize the terminal wealth and accumulated consumption utility subject to a mean variance criterion controlling the final risk of the portfolio. The multiple-objective optimization problem is firstly transformed into a single-objective one by introducing the concept of overall "happiness" of an investor defined as the aggregation of the terminal wealth under the mean-variance criterion and the expected accumulated utility, and then solved under a game theoretic framework. We have managed to maintain analytical tractability; the closed-form solutions found for a set of special utility functions enable us to discuss some interesting optimal investment strategies that have not been revealed before in literature.
Ben-Zhang Yang
Xin-Jiang He
Song-Ping Zhu
2020-05
Equilibrium of a production economy with non-compact attainable allocations set
http://d.repec.org/n?u=RePEc:hal:pseptp:halshs-01859163&r=upt
In this paper, we consider a production economy with an unbounded attainable set where the consumers may have non-complete non-transitive preferences. To get the existence of an equilibrium, we provide an asymptotic property on preferences for the attainable consumptions and we use a combination of the nonlinear optimization and fixed point theorems on truncated economies together with an asymptotic argument. We show that this condition holds true if the set of attainable allocations is compact or, when the preferences are representable by utility functions, if the set of attainable individually rational utility levels is compact. This assumption generalizes the CPP condition of [N. Allouch, An equilibrium existence result with short selling, J. Math. Econom. 37 2002, 2, 81–94] and covers the example of [F. H. Page, Jr., M. H. Wooders and P. K. Monteiro, Inconsequential arbitrage, J. Math. Econom. 34 2000, 4, 439–469] when the attainable utility levels set is not compact. So we extend the previous existence results with non-compact attainable sets in two ways by adding a production sector and considering general preferences.
Senda Ounaies
Jean-Marc Bonnisseau
Souhail Chebbi
nonlinear optimization,quasi-equilibrium,non-compact attainable allocations,Production economy
2019-03-01
Existence and Uniqueness of Recursive Utility Models in $L_p$
http://d.repec.org/n?u=RePEc:arx:papers:2005.07067&r=upt
Recursive preferences, of the sort developed by Epstein and Zin (1989), play an integral role in modern macroeconomics and asset pricing theory. Unfortunately, it is non-trivial to establish the unique existence of a solution to recursive utility models. We show that the tightest known existence and uniqueness conditions can be extended to (i) Schorfheide, Song and Yaron (2018) recursive utilities and (ii) recursive utilities with `narrow framing'. Further, we sharpen the solution space of Borovicka and Stachurski (2019) from $L_1$ to $L_p$ so that the results apply to a broader class of modern asset pricing models. For example, using $L_2$ Hilbert space theory, we find the class of parameters which generate a unique $L_2$ solution to the Bansal and Yaron (2004) and Schorfheide, Song and Yaron (2018) models.
Flint O'Neil
2020-05
Reference-Dependent Preferences, Time Inconsistency, and Unfunded Pensions
http://d.repec.org/n?u=RePEc:ces:ceswps:_8260&r=upt
In the real world, public pay-as-you-go pension (PAYG) schemes are popular and co-exist with private, retirement-saving schemes. This is true even in dynamically efficient economies where such pensions offer a lower return. The classic Aaron-Samuelson result argues that, in theory, this is impossible. Later work has shown that it may be possible if agents, left on their own, undersave due to myopia or time-inconsistency. In that case, if the government is paternalistic, a welfare rationale for PAYG pensions arises but only if voluntary retirement saving is fully crowded out because of a binding borrowing constraint. This paper generalizes the Aaron-Samuelson discussion to the reference-dependent utility setup of Kőszegi and Rabin (2009) where undersaving happens naturally. No borrowing constraint is imposed. In this case, it is possible to offer a non-paternalistic, welfare rationale for return-dominated, PAYG pensions to coexist with private retirement saving.
Torben M. Andersen
Joydeep Bhattacharya
Qing Liu
reference-dependence, crowding-out, pensions, dynamic efficiency
2020
The spirit of capitalism and optimal capital taxation
http://d.repec.org/n?u=RePEc:cuf:wpaper:614&r=upt
The paper reexamines the famous Chamley-Judd zero capital tax theorem in model economies where the agents are endowed with the spirit of capitalism. It is shown that the limiting capital income tax is not zero in general and depends on the utility speciffications rather than the production technology. The similar formulas of optimal capital taxes are derived in more general settings with multiple physical capitals or heterogeneous agents (capitalists and workers).
Fanghui Li
Gaowang Wang
Heng-fu Zou
2020
Risk and time preferences of farmers in India and Indonesia
http://d.repec.org/n?u=RePEc:zbw:crc990:32&r=upt
This cross-country study compares risk and time preferences of farmers from two lower-middle income countries, India and Indonesia. Current literature mainly focuses on a single country context; however, this study involves more than one country. Hence, we could investigate whether the individual preferences of farmers from two countries with similar income level are the same. The preferences are key for the policymakers to make informed policy decisions regarding investments and acceptance of development programs. Our study involved 1,528 farmers. The risk and time preferences were elicited using incentivised experiments and simultaneously estimated following the joint-estimation-method by Andersen et al. (2008). Results show that the farmers in India show a higher level of risk aversion and lower discount rates, even though very high discount rates were encountered in both countries. As a result, policymakers should consider implementing policies to deal with high discount rates causing poverty and lack of investment.
Sawosri, Arieska Wening
Mußhoff, Oliver
Cross-country dataset,lower-middle income countries,risk preferences,smallholder farmers,time preferences
2020
The Variance Risk Premium in Equilibrium Models
http://d.repec.org/n?u=RePEc:nbr:nberwo:27108&r=upt
The equity variance risk premium is the expected compensation earned for selling variance risk in equity markets. The variance risk premium is positive and shows moderate persistence. High variance risk premiums coincide with the left tail of the consumption growth distribution shifting down. These facts, together with a positive, yet moderate, difference between the risk-neutral entropy and variance of the aggregate market return, refute the bulk of the extant consumption-based asset pricing models. We introduce a tractable habit model that does fit the data. In the model, the variance risk premium depends positively (negatively) on “bad” (“good”) consumption growth uncertainty.
Geert Bekaert
Eric Engstrom
Andrey Ermolov
2020-05
The return on everything and the business cycle in production economies
http://d.repec.org/n?u=RePEc:aug:augsbe:0338&r=upt
A The risk premium puzzle is even worse than previously reported if housing is also taken into consideration next to equity. While housing premia are only moderately smaller than equity premia, they are significantly less volatile and the Sharpe ratio of housing is significantly larger. Hence, three question arise: i) are existing approaches to explain the equity premium puzzle also capable of explaining even larger Sharpe ratios than previously required, ii) can return rates and volatilities of various assets be differentiated, and iii) can different Sharpe ratios between the two risky assets be matched. We analyze these questions, next to business cycle statistics, by including housing into seminal approaches to solve the risk premium puzzle in production economies. Non-disaster economies with habit formation, capital adjustment costs and limited factor mobility fail to generate a Sharpe ratio of housing of the empirically observed size and do not explain co-moving economic activity. A basic model with time-varying disaster risk can reproduce the large Sharpe ratio of housing. Moreover, the model can explain different means and volatilities of the risky assets, economic activity comoves and the model explains the volatility ratio of business investments, residential investments and house prices. However, the model does not allow to disentangle the Sharpe ratios of the risky assets and premia on equity remain too involatile.
Christopher Heiberger
Daniel Fehrle
equity premium puzzle, housing, rare disasters, production CAPM, real business cycle literature
2020-05
Biased Health Perceptions and Risky Health Behaviors: Theory and Evidence
http://d.repec.org/n?u=RePEc:bol:bodewp:wp1146&r=upt
This paper investigates the role of biased health perceptions as driving forces of risky health behavior. We define absolute and relative health perception biases, illustrate their measurement in surveys and provide evidence on their relevance. Next, we decompose the theoretical effect into its extensive and intensive margin: when the extensive margin dominates, people (wrongly) believe they are healthy enough to “afford” unhealthy behavior. Finally, using three population surveys, we provide robust empirical evidence that respondents who overestimate their health are less likely to exercise and sleep enough, but more likely to eat unhealthily and drink alcohol daily.
Patrick Arni
Davide Dragone
Lorenz Goette
Nicolas R. Ziebarth
2020-04
Fiscal Stimulus In Expectations-Driven Liquidity Traps
http://d.repec.org/n?u=RePEc:awi:wpaper:0683&r=upt
I study liquidity traps in a model where agents have heterogeneous expectations and finite planning horizons. Backward-looking agents base their expectations on past observations, while forward-looking agents have fully rational expectations. Liquidity traps that are fully or partly driven by expectations can arise due to pessimism of backward-looking agents. Only when planning horizons are finite, these liquidity traps can be of longer duration without ending up in a deflationary spiral. I further find that fiscal stimulus in the form of an increase in government spending or a cut in consumption taxes can be very effective in mitigating the liquidity trap. A feedback mechanism of heterogeneous expectations causes fiscal multipliers to be the largest when the majority of agents is backward-looking but there also is a considerable fraction of agents that are forward-looking. Labor tax cuts are always deflationary and are not an effective tool in a liquidity trap.
Lustenhouwer, Joep
bounded rationality; fiscal policy; liquidity trap; heterogeneous expectations
2020-05-14
Feeling good or feeling better?
http://d.repec.org/n?u=RePEc:aim:wpaimx:2014&r=upt
Can people remember correctly their past well-being? We study three national surveys of the British, German and French population, where more than 50,000 European citizens were asked questions about their current and past life satisfaction. We uncover systematic biases in recalled subjective well-being: on average, people tend to overstate the improvement in their well-being over time and to understate their past happiness. But this aggregate figure hides a deep asymmetry: while happy people recall the evolution of their life to be better than it was, unhappy ones tend to exaggerate its worsening. It thus seems that feeling happy today implies feeling better than yesterday. These results offer an explanation of why happy people are more optimistic, perceive risks to be lower and are more open to new experiences.
Alberto Prati
Claudia Senik
life satisfaction, remembered utility, memory biases, intra-personal comparisons
2020-04
Incentivizing Behavioral Change: The Role of Time Preferences
http://d.repec.org/n?u=RePEc:nbr:nberwo:27079&r=upt
How should the design of incentives vary with agent time preferences? We develop two predictions. First, “bundling” the payment function over time – specifically by making the payment for future effort increase in current effort – is more effective if individuals are impatient over effort. Second, increasing the frequency of payment is more effective if individuals are impatient over payment. We test the efficacy of time-bundling and payment frequency, and their interactions with impatience, using a randomized evaluation of an incentive program for exercise among diabetics in India. Consistent with our theoretical predictions, bundling payments over time meaningfully increases effort among the impatient relative to the patient. In contrast, increasing payment frequency has limited efficacy, suggesting limited impatience over payments. On average, incentives increase daily steps by 1,266 (13 minutes of brisk walking) and improve health.
Shilpa Aggarwal
Rebecca Dizon-Ross
Ariel D. Zucker
2020-05
Mortgage Contracts and Selective Default
http://d.repec.org/n?u=RePEc:arx:papers:2005.03554&r=upt
We analyze recently proposed mortgage contracts which aim to eliminate selective borrower default when the loan balance exceeds the house price (the "underwater" effect). We show that contracts which automatically reduce the outstanding balance in the event of local house price decline remove the default incentive, but may induce prepayment in low price states. However, low state prepayments vanish if borrower utility from home ownership, or outside options such as rental costs, are too high. We also show that capital gain sharing features, through prepayment penalties in high house price states, are ineffective, as they virtually eliminate prepayment in such states. For typical foreclosure costs, we find that contracts with automatic balance adjustments become preferable to the traditional fixed rate mortgage at contract rate spreads of approximately 50-100 basis points, depending on how far prices must fall before adjustments are made. Furthermore, these spreads rapidly decrease with the borrower utility from home ownership. Our results are obtained using American options pricing methods, in a model with diffusive home prices, and either diffusive or constant interest rates. We determine the contract, default and prepayment option values with optimal decision rules. We provide explicit solutions in the perpetual case with constant interest rates; and numerically compute the prepayment and default boundaries in the general case.
Yerkin Kitapbayev
Scott Robertson
2020-05
On Investment and Cycles in Explicitely Solved Vintage Capital Models
http://d.repec.org/n?u=RePEc:hal:psewpa:halshs-02570648&r=upt
The purpose of this contribution is to consider a discrete time formulation that would allow for clarifying some salient features of a vintage based understanding of the capital stock..ree main lines of conclusions are established on an analytical basis. First and for an elementary conguration with linear utility, it is proved that the rate of growth of investment is prone to andoscillating—convergent, sustained or unstable—motions. Second and for an environment with a linear production technology and a AK setup, the dynamics of investment is explicitly solved and it is established that the rate of growth of investment may either converge to the steady growth solution in oscillating way, diverge from that solution in a oscillating way, or even undergo permanent sustained oscillations with a periodicity of two. .ird, it is proved that no perennial .uctuations can emerge within a benchmark environment with strictly concave utilities and production technologies. On a methodological basis, few restrictions are superimposed, the arguments remain fairly general and the proofs are elementary.
Hippolyte d'Albis
Jean-Pierre Drugeon
Vintage Capital,Optimal Growth,Discrete Time
2020-05
Sparse demand systems: corners and complements
http://d.repec.org/n?u=RePEc:boc:bocoec:1005&r=upt
We propose a demand model where consumers simultaneously choose a few different goods from a large menu of available goods, and choose how much to consume of each good. The model nests multinomial discrete choice and continuous demand systems as special cases. Goods can be substitutes or complements. Random coefficients are employed to capture the wide variation in the composition of consumption baskets. Non-negativity constraints produce corners that account for different consumers purchasing different numbers of types of goods. We show semiparametric identification of the model. We apply the model to the demand for fruit in the United Kingdom. We estimate the model’s parameters using UK scanner data for 2008 from the Kantar World Panel. Using our parameter estimates, we estimate a matrix of demand elasticities for 27 categories of fruit and analyze a range of tax and policy change scenarios.
Arthur Lewbel
Lars Nesheim
sparse demand, discrete choice, continuous choice, complements, complementarity, substitutes, demand estimation, scanner data, fruit, quadratic utility
2019-11-15