We consider a model of moral hazard with limited liability of the agent and effort that is two-dimensional. One dimension of the agent’s effort is observable and the other is not. The principal can thusmake the contract conditional not only on outcome but also on observable effort. The principal’s optimal contract gives the agent no rent and – in contrast to the first-best allocation – uses toomuch observable effort and too little unobservable effort. This distortion in the relative use of the two kinds of effort increases if the agent’s liability becomes more limited.

The new Medicare Part D program provides prescription drug coverage for older Americans through highly subsidized and tightly regulated plans offered by private insurance firms. For most eligible individuals without coverage from other sources, obtaining Part D coverage would be rational, but it requires active enrollment and plan choice decisions. We investigate if non-enrollment in Medicare Part D can partly be explained by risk aversion. Data are taken from a national online survey conducted just after the introduction Part D. The survey included a context-free and a context-related hypothetical lottery to measure an individual’s attitude towards risk. Respondents who are risk tolerant according to these measures were significantly less likely to enroll in Part D. We also illustrate that hypothetical choice questions designed to elicit risk attitudes are subject to reference-point effects. Even minor differences in the priming of respondents can result in potentially misleading conclusions about the role of risk aversion in the insurance decisions.

We analyze the profitability of third degree price discrimination under consideration of consumers' fairness concerns within an experiment and explain the results within a theoretical framework. We find that with an increase in the price differential negative reciprocal reactions by disadvantaged consumers become stronger compared to positive reciprocal reactions by advantaged consumers. Consequently, the profit maximizing price differential lies below the one predicted to be optimal by standard theory. Further, profitability increases when consumers who are regarded as poorer are charged lower prices compared to when the wealth of the different consumer groups is unknown.

In this paper, we ask whether courts should continue to rule settlements in the context of pharmaceutical claims per se legal, when these settlements comprise payments from originator to generic companies, potentially delaying generic entry compared to the underlying litigation. Within a theoretical framework we compare consumer welfare under the rule of per se legality with that under alternative standards. We find that the rule of per se legality induces maximal collusion among settling companies. In comparison, the rule of per se illegality entirely prevents collusion and the rule of reason induces limited collusion when antitrust enforcement is subject to error. Contrary to intuition, limited collusion can be welfare enhancing as it increases companies' expected settlement profits and thus fosters generic entry. Generic companies obtain additional incentives to challenge probabilistic patents, which potentially leads to overall increased competition. We further show that generic entry is fostered more effectively by inducing limited collusion than by rewarding first generic entrants with an exclusivity right.

Antitrust scholars have argued that exclusive contracts have anticompetitive, or at best neutral effects, if no efficiencies are generated. In contrast, this paper shows that exclusive contracts can have procompetitive effects, provided buyers are imperfect downstream competitors and contract breach is feasible. In that case an efficient entrant is not necessarily foreclosed through exclusive contracting but induces buyers to breach. Because breaching buyers have to pay expectation damages to the incumbent, the downstream profits they obtain when breaching must be large enough. Therefore, the entrant needs to set a lower wholesale price than absent exclusive contracting, leading to lower final consumer prices and higher welfare.

This article illustrates an innovative method of administering stated choice studies (or vignette experiments) using computers and the Internet. The use of video clips to deliver information to research participants makes vignettes more realistic, helps to engage interest of research participants, and can reduce framing effects. The method also provides research participants with interactive options before making judgments. A study to determine the views of older people regarding residential options is used to illustrate the method. Even older people with limited experience in using computers participated successfully. The study findings showed that research participants responded both to the audiovisual characteristics of vignette persons and to the variables in the vignette structure.

Older people who experience declining health are often faced with difficult decisions about possible residential relocation. The research aim was to determine how five distinct dimensions-functional status, features of current housing, social networks, features of retirement communities, and financial considerations-affect decisions to relocate to a retirement community. A vignette experiment with a factorial design was conducted involving both older people and adult children who were concerned with an aging parent. Use of the Internet for administration of the experiment made it possible to deliver information to research participants through video clips. Research participants were influenced by each of the dimensions; however, functional status of the vignette persons had the greatest impact, and financial considerations the least. Adult children were more likely to recommend moves than were older people. The research is suggestive of the potential for use of vignette experiments for a fuller understanding of relocation decisions.

Many decisions are interactive; the outcome of one party depends not only on its decisions or on acts of nature but also on the decisions of others. In the present article, we review the literature on decision making made by groups of the past 25 years. Researchers have compared the strategic behavior of groups and individuals in many games: prisoner's dilemma, dictator, ultimatum, trust, centipede and principal-agent games, among others. Our review suggests that results are quite consistent in revealing that groups behave closer to the game-theoretical assumption of rationality and selfishness than individuals. We conclude by discussing future research avenues in this area.

This paper develops a competition theory framework that evaluates an important aspect of the OECD’s Harmful Tax Practices Initiative against tax havens. We show that the sequential nature of the process is harmful and more costly than a “big bang” multilateral agreement. The sequentiality may even prevent the process from being completed successfully. Closing down a subset of tax havens reduces competition among the havens that remain active. This makes their “tax haven business” more profitable and shifts a larger share of rents to these remaining tax havens, making them more reluctant to give up their “tax haven business”. Moreover, the outcome of this process, reducing the number of tax havens, but not eliminating them altogether, may reduce welfare in the OECD.

We study conflict between two groups of individuals. Using Schaffer`s (1988) concept of evolutionary stability we provide an evolutionary underpinning for in-group altruism combined with spiteful behavior towards members of the rival out-group. We characterize the set of evolutionarily stable combinations of in-group favoritism and out-group spite and find that an increase in in-group altruism can be balanced by a decrease in spiteful behavior towards the out-group.

We study an all-pay contest with multiple identical prizes ("lifeboat seats"). Prizes are partitioned into subsets of prizes ("lifeboats"). Players play a twostage game. First, each player chooses an element of the partition ("a lifeboat"). Then each player competes for a prize in the subset chosen ("a seat"). We characterize and compare the subgame perfect equilibria in which all players employ pure strategies or all players play identical mixed strategies in the first stage. We find that the partitioning of prizes allows for coordination failure among players when they play nondegenerate mixed strategies and this can shelter rents and reduce rent dissipation compared to some of the less efficient pure strategy equilibria.

We examine a stark setting in which security or protection can be provided by self-governing groups or by for-profit entrepreneurs (kings, kleptocrats, or mafia dons). Though selfgovernance is best for the population, it faces problems of long-term viability. Typically, in providing security the equilibrium market structure involves competing lords, a condition that leads to a tragedy of coercion: all the savings from the provision of collective protection are dissipated and welfare can be as low as, or even lower than, in the absence of the state.

We study the effects of patriotism on tax compliance. In particular, we assume that individuals feel a (random draw of) warm glow from honestly paying their taxes. A higher expected warm glow reduces the government's optimal audit probability and yields higher tax compliance. Second, individuals with higher warm glow are less likely to evade taxes. This prediction is confirmed empirically by a multivariate analysis on the individual level while controlling for several other potentially confounding factors. The findings survive a variety of robustness checks, including an instrumental variables estimation to tackle the possible endogeneity of patriotism. On the aggregate level, we provide evidence for a negative correlation between average patriotic warm glow and the size of the shadow economy across several countries.

What insights can be gained from bringing the theory of the firm to the global economy? I discuss several new features of the world economy that can be explained by incorporating the theory of the firm into the theory of international trade. Among the new features I discuss are the move to flatter corporate hierarchies and the decentralization of authority in firms, the “war for talent”, the rise of CEO pay in rich countries, organizational convergence across countries, and firm heterogeneity.

In 1979, when anthropometric history was still in its infancy, Robert Fogel and collaborators reported that the height of the US male white population began to decline quite unexpectedly around the birth cohorts of 1830. This was quite a conundrum on account of the fact that according to conventional economic theory nutritional status was not expected to diminish at the outset of modern economic growth, i.e., at a time when incomes were growing robustly. Although many hypotheses were offered, not until 1987 was the comprehensive solution to the puzzle offered that the height decline was due primarily to a decline in food consumption: agricultural productivity did not keep pace with rapid population growth and urbanization. However, it took a third of a century for a Kuhnian paradigm shift to occur until most of the participants in the debate accepted the model elucidated by Komlos in 1987.

This note generalizes Feldstein’s (1976) criticism of Barro’s(1974) analysis for the case that the interest rate exceeds the growth rate. This is done by considering an economy in steady state where all agents hold “Barro expectations”: they believe that government debt must necessarily be repaid and therefore leave the present value of their income streams unchanged. In this scenario, a change in the mode of taxation affects the present value of disposable income in the private sector. This violates their Barro expectations.

We develop a model relating self-control, risk preferences and conflict identification to cooperation patterns in social dilemmas. We subject our model to data from an experimental public goods game and a risk experiment, and we measure conflict identification and self-control. As predicted, we find a robust association between self-control and higher levels of cooperation, and the association is weaker for more risk-averse individuals. Free riders differ from other contributor types only in their tendency not to have identified a self-control conflict in the first place. Our model accounts for the data at least as well as do other models.

Individuals’ choices of educational content are often shaped by the political economy of government policies that determine the incentives to acquire various skills. We first present a model to show how differences in educational content emerge as an equilibrium outcome of private decisions and government policy choices. We then illustrate these dynamics in two historical circumstances. In medieval Europe, states and the Church found individuals trained in Roman law valuable, and eventually supported investments in this new form of human capital. This had positive effects on Europe’s commercial and institutional development. In late 19th-century China, elites were afraid of the introduction of Western science and engineering and continued to select civil servants - who enjoyed substantial rents—based on their knowledge of Confucian classics. As a result, China lacked skills useful in modern industry. Finally, we present a variety of other contemporary and historical applications of this theory.

What insights can be gained from bringing the theory of the firm to the global economy? I discuss several new features of the world economy that can be explained by incorporating the theory of the firm into the theory of international trade. Among the new features I discuss are the move to flatter corporate hierarchies and the decentralization of authority in firms, the “war for talent”, the rise of CEO pay in rich countries, organizational convergence across countries, and firm heterogeneity.

This paper analyzes gender differences in the investment activity of German small and medium sized enterprises (SMEs). The empirical analysis is carried out on a sample of firms drawn from the KfW Mittelstandspanel, a representative survey of German SMEs for the period from 2003 to 2009. We find evidence that female-owned firms are less likely to invest and if they invest, then their average investment rate is lower. These differences cannot entirely be explained by firm or owner characteristics. Furthermore, women’s investment is less sensitive to cash flow, which indicates that it is unlikely that their lower investment is driven by difficulties in acquiring external finance. An analysis of stated investment goals reveals that women have different preferences and attitudes towards investment. They indicate to a lesser extent aspiring and growth-orientated investment goals like sales increase, innovation/R&D or implementation of new products.