Career Tournaments

This paper studies a model of career concerns where (besides agents having different ability levels) principals are heterogeneous. Two types of heterogeneity are considered: principals can differ in their productivities, and in the visibility of the agents working for them. Productivity differences result in convex wage profiles and generate assortative matching between principals and agents. Visibility differences, on the other hand, affect the mobility and career prospects of agents, and can generate nonassortative matching. We characterize the equilibrium in this market, derive implications for the behavior of agents, and examine the incentives to invest in increasing productivity and visibility.     

Diversification revisited

Many investment companies hold diversified asset portfolios and frequently try to mirror or outperform a market index for each asset class such as stocks and bonds. As Wibaut and Wilford (2009) show, often the same issuers appear in each of those indices and this may lead to undesirable results such as during a crisis period. Our research further explores the topic of diversification with a special focus on the financial crisis period of 2007 through 2009. Our results indicate that there is benefit in terms of correlations from holding bond and stock portfolios. Interestingly, these findings show the benefit is most pronounced during times of market stress.     

The complexity of food choices in an everyday context

This study aims to understand the complexity of food choices in an everyday household context. The qualitative data are based on homemakers’ (n = 18) context‐specific accounts of their choice of milk brand, i.e. milk varieties with different fat contents (noted in a 4‐day qualitative food diary and a semi‐structured interview based on the diary). These accounts were considered an approximation of real food choices in households. The necessity of making compromises between contradictory expectations makes food choices, as well as milk brand choices, problematic. The homemakers' accounts involve various levels affecting household activities. At the individual level, the most important motive of choice is the taste and practical use of a product. At the level of households, the traditions stemming from one's childhood and the social aspect of acknowledging other family members’ taste preferences are important. The influence at the level of society and culture leads towards healthier choices, e.g. by providing examples of new, healthier food habits. Here, the special nature of everyday knowledge is emphasized as context dependent. This provides a complementary view to the more traditional, cognitive views of studying the relationship between knowledge of nutrition and food choices. Choices are determined not only by stimulus, cognition or societal structures, but are also constrained by everyday conditions, as well as by the activities of other people.     

Who Uses Intermediaries in International Trade? Evidence from Firm‐level Survey Data

The present paper uses data from the World Bank Enterprise Survey conducted in Turkey in 2005 to shed light on the firms that use intermediaries in international trade. It lends robust empirical support to recent theories which suggest that indirect exporters are mostly small firms that are not profitable enough to cover the high fixed costs of building an own distribution network abroad. Manufacturers who develop new products are more likely to use trade intermediaries, as are firms that produce low‐quality goods. In contrast, neither foreign ownership nor credit constraints are correlated with the choice of export mode. Moreover, firms that rely on trade intermediaries to sell their goods abroad also do so to source their foreign inputs, implying that the role of intermediaries in facilitating trade may be larger than previous studies suggest.     

Recreational betting: individual betting profiles

This paper complements a previous article (Filby and Harvey, 1988) on aggregate betting patterns by describing in some detail the betting patterns and strategies of individual punters. The habits of 67 regular punters drawn from three Birmingham betting shops are analysed on the basis of the evidence of their betting slips. While the discussion bears witness to the effort invested in betting activity by punters, it also urges some caution in overinterpreting the intellectual work in betting. Many of the punters display fairly routinized decision-making in the construction and staking of their bets, which holds across the two main groups of punters identified in the analysis.     

Understanding how consumers view green hotels: how a hotel's green image can influence behavioural intentions

As the public is increasingly concerned about environmental issues, green management is rapidly becoming a strategic tool that can enhance a hotel's competitive advantage. This study explores how to develop the image and branding of a green hotel using the concepts of cognitive, affective and overall images. The study, based on a survey of 416 hotel users, also investigates how a green hotel image can affect behavioural intentions (i.e. intention to revisit, intention to offer positive recommendations to others and willingness to pay a premium). The findings confirm that cognitive image components (namely value and quality attributes) can exert a positive influence on a green hotel's affective and overall images. The affective image is also found to positively affect a green hotel's overall image. A green hotel's overall image, in turn, can contribute to more favourable behavioural intentions. Quality attributes were found to be more powerful than value attributes. The importance of the concept of selfish altruism and obtaining a feeling of wellbeing from a purchase were shown to be very strong. A range of theoretical and practical implications are discussed.     

Constrained output maximization and US agriculture

This paper presents a framework for estimating an indirect production function and then applies it to aggregate US agriculture. Issues addressed include tests of standard hypotheses about the underlying technology (homotheticity, neutral technical change, etc.) as well as examination of consistency in aggregation and the effects of changes in the level of aggregate expenditure on farm output. Since there already exist several studies empirically describing agricultural production technologies with indirect objective functions, one might fairly ask whether this paper really breaks any new ground? We feel that it does. One reason is that existing studies (e.g. Binswanger, 1974; Lopez, 1980; Ball and Chambers, 1982; Ray, 1982; and Weaver, 1983) all rely on either profit or cost functions. To date there appears to be only one study using an indirect production (Appelbaum, 1979), and it is not in agriculture. This seems unfortunate because there are many instances in agriculture for which an indirect production function (or revenue function approach) seems more appropriate. The reason why relates directly to one's belief about the objective function and constraints farmers face. Ultimately, it seems plausible in a certainty framework that producers maximize profits. And since cost minimization and output maximization are just constrained versions of profit maximization, both cost and indirect production functions are more appropriately viewed as restricted profit functions. What differs is the constraint. Assuming cost minimization implies that farmers are constrained by a fixed output which they must produce; in most instances, this is implausible. More likely, the level of output is itself a choice variable. Output maximization, on the other hand, suggests that the main constraint is the amount of money that producers can muster to hire resources. In other words, farmers may face binding constraints in obtaining the profit maximizing level on expenditure on input utilization. One might think that expenditure may not be a binding constraint because there exists a relatively active US credit market. However, the US credit market is far from being perfectly competitive in a stylized sense, and thus, the possibility of a farmer being able to finance a given level of expenditure may be limited.

Readers familiar with the dual approach to production problems may already be asking why these ideas rule out cost functions since it is well known that the cost function is the distance function of the indirect production function (Blackorby et al., 1978)? In principle, therefore, one could always estimate a cost function and then invert it to obtain the indirect production function. There are two problems with this approach: the first is that if output maximization is truly the objective, output is not predetermined and cannot be treated as exogenous in cost function estimation. Second, estimation of direct and indirect functions using the same data set does not always yield comparable results. Estimation of a transcendental logarithmic (translog) indirect production function and a translog cost function, separately, does not generally yield identical estimates of the Allen elasticities of substitutions. Solving the first problem in simple, but the second suggests that estimation should proceed on the basis of the objective function the researcher deems most appropriate. Therefore, if output maximization is more plausible than cost minimization an indirect production function should be used.

The plan of the paper is as follows. We first outline the theoretical developments necessary to our approach (included are conditions necessary for consistent aggregation over firms). We then present estimates of an indirect production function and use these estimates to investigate the plausibility of various restrictions on the technology, consistency in aggregation, substitution possibilities in agricultural production, and the effect of expenditure on agricultural input utilization. The paper closes with a discussion of the results and suggestions for future research.     

A Jump-diffusion Model for Exchange Rates in a Target Zone

We propose a simple jump-diffusion model for an exchange rate target zone. The model captures most stylized facts from the existing target zone models while remaining analytically tractable. The model is based on a modified two-limit version of the C OX , I NGERSOLL and R OSS (1985) model. In the model the exchange rate is kept within the band because the variance decreases as the exchange rate approaches the upper or lower limits of the band. We also consider an extension of the model with parity adjustments, which are modeled as Poisson jumps. Estimation of the model is by GMM based on conditional moments. We derive prices of currency options in our model, assuming that realignment jump risk is idiosyncratic. Throughout, we apply the theory to EMS exchange rate data. We show that, after the EMS crisis of 1993, currencies remain in an implicit target zone which is narrower than the officially announced target zones.