Differentiable von Neumann-Morgenstern utility

Summary. Differentiability is a convenient property of von Neumann-Morgenstern utility functions which is almost always imposed but has not been translated into behavioral terms. In applications, expected utility is usually maximized subject to a constraint, and the maximization is carried out by differentiating the utility function. This paper presents two sets of necessary and sufficient conditions for a risk averse von Neumann-Morgenstern utility function to be differentiable. The first of them is formulated in terms of the equivalent risk premia of small gambles. It says, in brief, that the equivalent risk premium is of a smaller order of magnitude than the risk itself, as measured by the expectation of the absolute value of the risk. The second set of necessary and sufficient conditions is formulated in terms of the probability premium of small lotteries. It says, essentially, that the probability premium for small binary lotteries goes to zero as the size of the lottery goes to zero. Received: May 11, 1997; revised version: May 14, 1998     

MEDIEVAL MATCHING MARKETS

We study the regulation of brokerage in wholesale markets in premodern Central Western Europe. Examining 1,804 sets of rules from 82 cities, we find brokerage was primarily a centralized matchmaking mechanism. Brokerage was more common in towns with larger populations, better access to sea ports and trade routes, and greater political autonomy. Brokers' fee structures varied systematically: price-based fees were more common for highly heterogeneous goods, quantity-based fees for more homogeneous goods. We show theoretically that this was broadly consistent with total surplus maximization, and that brokerage was more valuable in markets with unequal numbers of buyers and sellers.     

Factors affecting the price of Swedish forest land, 1965–1987

A model for the determination of the price of forest land is estimated for Sweden from 1965–1987, when (except for a few years) private non-industrial forest owners could finance their holdings at a negative real after-tax borrowing rate. It is assumed that credit has been limited by the value of mortgage security, assessed independently of the price settlement. The estimated coefficients of the regression equation are used for a calculation of the average real rate of discount of forest owners and the average value of amenities. The model also evaluates the effect of the temporary land price regulation from 1979–1987.     

THE HEALTHCARE VOUCHER: EMERGENCE,FORMATION AND DISSEMINATION

Market‐inspired healthcare reforms have been introduced in Sweden: Freedom of Choice in Healthcare in 1989 and the National Healthcare Guarantee in 2005. After the general election 2006 the idea of the Healthcare Voucher has followed. Built on a theoretical framework composed of Foucault's concept of 'discursive formation' supported by Butler's concept of the ‘performativity of discourse’ the purpose is to analyse the emergence, formation and dissemination of this idea into healthcare in Sweden. The Voucher is disseminated in a form reminiscent of a chain linking a series of texts, referring to each other and building on each other's formulations strengthening each other's messages. It circulates under designations such as healthcare voucher and money and seems to be disseminated by being combined with 'freedom of choice' forming the theme customer choice. The Healthcare Voucher then becomes a means of being able to realise an idea of a political nature, building markets in healthcare. The paper offers a way of analysing how ideas influence the policy agenda, in particular for the voucher/s. Distinctions could be made between the voucher idea and 'money following the patient' in quasi markets. A critical issue in introducing choice and competition, not explored here, is the issue of ‘cream skimming’.     

Do Alternative Real Estate Investment Vehicles Add Value to REITs? Evidence from German Open-ended Property Funds

Besides the more commonly used REITs, German investors can also invest in a lesser-known real estate vehicle, Open-ended Property Funds. OPFs are considered a compromise between listed and direct real estate investments. OPF fund managers generally provide daily (perfect) liquidity. However, if liquidity falls below 5%, share redemptions in these funds can be temporarily suspended for a period of up to two years. During this time, investors will only be able to sell shares on the secondary market (exchange), and are thus subject to significant liquidity risk. The objective of this paper is to analyze whether OPFs add value to investor portfolios above that provided by REITs. We show that OPFs have a diversification advantage over REITs in low-risk portfolios, despite their larger potential liquidity risk. REIT liquidity is comparable to that of ordinary common stock, but OPFs exhibit an average initial discount to funds’ NAV of about 6% when share redemptions are temporarily suspended. However, in the long-run, this potential redemption suspension does not negatively influence OPF performance (in case OPFs reopen again). This makes OPFs an attractive investment alternative to REITs for investors who have a high level of risk aversion and a long-term investment horizon, such as endowments, insurance companies, and pension funds.     

Self-perceptions, government policies and tax compliance in Germany

The policy of choice to fight tax non-compliance is an increase in deterrence, i.e. fines and audits, which seems to be well-grounded theoretically as the economics of crime justifies such an increase of the expected costs of illegal activities. In this paper, the impact of subjectively perceived deterrence on undeclared work is analyzed for the German case. Germany is particularly interesting because it considerably increased deterrence to fight tax non-compliance recently. The data set used for this analysis contains several waves of survey data conducted between 2004 and 2008. According to our evidence, (subjectively perceived) deterrence has an impact on undeclared work, but the influence of social norms is similarly important.     

Gender and self-selection into a competitive environment: Are women more overconfident than men?

Using a large running race in Sweden, this study shows that there are male-dominated environments in which the selection of women who participate are more likely to be confident/competitive and that, within this group, performance improves equally for both genders in absolute terms.     

Knowledge Disclosure and Transmission in Buyer–Supplier Relationships

A buyer’s technical knowledge may increase the efficiency of its supplier. Suppliers, however, frequently maintain relationships with additional buyers. Knowledge disclosure then bears the risk of benefiting one’s own rival due to opportunistic knowledge transmission through the common supplier. We show that in one-shot relationships no knowledge disclosure takes place because the supplier has an incentive to transmit and, anticipating that, buyers refuse to disclose any of their knowledge. In repeated relationships knowledge disclosure is stabilized by larger technological proximity between buyers and suppliers and destabilized by the absolute value of the knowledge.      

Assessing the Least Squares Monte-Carlo Approach to American Option Valuation

A detailed analysis of the Least Squares Monte-Carlo (LSM) approach to American option valuation suggested in Longstaff and Schwartz (2001) is performed. We compare the specification of the cross-sectional regressions with Laguerre polynomials used in Longstaff and Schwartz (2001) with alternative specifications and show that some of these have numerically better properties. Furthermore, each of these specifications leads to a trade-off between the time used to calculate a price and the precision of that price. Comparing the method-specific trade-offs reveals that a modified specification using ordinary monomials is preferred over the specification based on Laguerre polynomials. Next, we generalize the pricing problem by considering options on multiple assets and we show that the LSM method can be implemented easily for dimensions as high as ten or more. Furthermore, we show that the LSM method is computationally more efficient than existing numerical methods. In particular, when the number of assets is high, say five, Finite Difference methods are infeasible, and we show that our modified LSM method is superior to the Binomial Model.     

A Note on Green Taxes and Double Dividends

Two highly influential articlesin the literature on green taxes and double dividends are Bovenbergand de Mooij (1994) and Goulder (1995). Goulder's primary concernis whether or not green tax reforms may increase welfare definedexclusive of environmental quality, while Bovenberg and de Mooijprimarily focus on the employment effects of such reforms. Unfortunately,Goulder misinterprets Bovenberg and de Mooij's results in takingthe sign of the uncompensated wage elasticity of labour supplyas being the decisive factor for whether or not welfare exclusiveof environmental quality rises under a green tax reform. Thiserror is pointed out and corrected in this note.