THE THEORY OF WARRANTY CONTRACTS

Abstract. This paper surveys theories of the existence and design of warranty contracts. Insurance, signalling, and incentive motives are used to explain the existence of warranties. The incorporation of imperfections that prevent warranties from serving their basic purposes in a first-best way describes actual warranty practices.     

A SURVEY OF THE ECONOMICS OF PATENT SYSTEMS AND PROCEDURES

The last several decades have seen increases in patenting activity worldwide, as well as growing issues related to patent quality. In response to these quality issues a recent patent literature has emerged, that investigates the behavior and incentives of patent examiners, applicants, and third parties. In this paper, we provide an overview of patent procedures, patent systems and a survey of the new economic literature on patent systems. Both theoretical and empirical papers are considered. Policy implications coming from this literature are presented.     

MACROECONOMIC POLICY EVALUATION AND OPTIMAL CONTROL THEORY: A CRITICAL REVIEW OF SOME RECENT DEVELOPMENTS

Abstract. This survey addresses the recent literature on the application of optimal control theory and game theory to macroeconomic policy evaluation and design. This literature focuses on strategic interactions between governments and private agents engaged in dynamic non-cooperative games and emphasizes such issues as precommitment, credibility and reputation as important and endemic aspects of optimal policy design. A dominant theme is the problem of dynamic inconsistency and the inferiority of an equilibrium in single-stage full-information games without commitment. This may be alleviated in repeated games involving reputation effects and threat strategies designed to coerce rivals into pursuing particular strategies and to sustain a sequential equilibrium. The type and characteristics of a sequential equilibrium also depend importantly upon the information structure conditioning players'beliefs under uncertainty. Included here are separating and pooling equilibria, involving notions of learning, signalling and information revelation. Additional dimensions exist in stochastic systems which introduce other forms of uncertainty. Optimal control and game theory have also been applied to international macroeconomic policy design, with emphasis on the potential costs and benefits of non-cooperative and cooperative behaviour between countries and problems of international policy coordination.     

THE THEORY AND ESTIMATION OF INDIVIDUAL AND SOCIAL WELFARE MEASURES

Abstract. The most widespread measure of individual welfare is consumer surplus ( cs ). If consumer surplus is to represent underlying preferences, very restrictive assumptions must be imposed and, worse, the resulting measures completely ignore distributional issues. Applied economists often argue that consumer surplus is a good approximation to the theoretically correct measures and the only feasible choice in practice. This is no longer true; recent advances in estimation techniques have made it possible to determine the approximate values of the correct measures quite satisfactorily. The theory and estimation of social welfare measures automatically involves ethical and distributional judgements. Often, these are difficult to incorporate in intuitive summary indicators that are easy to estimate. A range of money metric measures is presented that provide a more desirable, albeit still problematic alternative. Subject to severe data limitations, the theoretically correct welfare measures can be estimated for a wide range of modelling situations using parametric and nonparametric techniques.     

THE ECONOMICS OF ABSENCE: THEORY AND EVIDENCE

Abstract. Worker absenteeism constitutes a significant loss of work-time and therefore has important implications for both household income and firm productivity. Despite this, the economics profession has been somewhat laggard relative to other disciplines in addressing the phenomenon. The situation is, however, changing, with recent years witnessing a mild flurry of activity. The aim of this paper is to maintain, and if possible, enhance this momentum. We do this firstly by developing some basic theoretical ideas which we consider to be central to an economic analysis of absence. In particular, we address the often cited claim that observed absence is unequivocally inefficient. Second, by reviewing some of the key contributions, we attempt to assess where the literature on the economics of absence stands at present, as well as suggesting some potentially fruitful lines of future enquiry.     

THE THEORY OF STATE-OWNED ENTERPRISES IN MARKET ECONOMIES

Abstract. Four topics are covered: the circumstances under which state-owned enterprises (SOEs) are more effective than private firms; the different approaches to modelling public and private firms; the performance of SOEs; and strategies including privatization to limit their more damaging effects. It is argued that ideological or development motives are important in their genesis, but that if efficiency and innovation are key considerations the normative case for their existence is more doubtful. Various types of SOE model are identified, deriving from the variety of circumstances in which they operate, and the theoretical perspective of the modeller. These include the property rights school, the public choice tradition, neoclassical, behavioural and budget maximizing approaches. All models assume the existence of monitoring problems, created by informational asymmetry. The consequences can include high non-pecuniary benefits for managers, a concentration on monitored activities, and lower innovation levels and efficiency than private firms. Curiously this is not necessarily reflected in higher prices or costs. Possible remedial strategies include a change of ownership, a change of objectives, the introduction of incentive-compatible payment schemes, improved performance indicators and privatization.     

WHAT'S IN A SIGN ? TRADEMARK LAW AND ECONOMIC THEORY

Abstract.  The aim of this paper is to summarize the extant theory as it relates to the economics of trademark, and to give some suggestions for further research with reference to distinct streams of literature. The proposed line of study inevitably looks at the complex relationship between signs and economics.
Trademark is a sign introduced to remedy a market failure. It facilitates purchase decisions by indicating the provenance of the goods, so that consumers can identify specific quality attributes deriving from their own, or others', past experience. Trademark holders, on their part, have an incentive to invest in quality because they will be able to reap the benefits in terms of reputation.
In other words, trademark law becomes an economic device which, opportunely designed, can produce incentives for maximizing market efficiency. This role must, of course, be recognized, as a vast body of literature has done, with its many positive economic consequences.
Nevertheless, trademark appears to have additional economic effects that should be equally recognized: it can determine the promotion of market power and the emergence of rent-seeking behaviours. It gives birth to an idiosyncratic economics of signs where very strong protection tends to be assured, even though the welfare effects are as yet poorly understood. In this domain much remains to be done and the challenge to researchers is open.     

THE TERM STRUCTURE OF INTEREST RATES: EVIDENCE AND THEORY

Abstract. The term structure of interest rates is an old topic. Over the years, both the hypotheses debated and the research techniques used have changed considerably. Two fairly recent developments which distinguish current research are the widespread adoption of rational expectations and the integration of the term structure with the general theory of asset pricing. This survey reviews previous work from this perspective. The main objective is to catalogue available evidence about term premia and to interpret this evidence in light of alternative models of term premia determination.     

THE ECONOMICS OF HEALTH AND SAFETY AT WORK: AN INTERDICIPLINARY REVIEW OF THE THEORY AND POLICY

Abstract This paper engages in an interdisciplinary survey of the current state of knowledge related to the theory, determinants and consequences of occupational safety and health (OSH). It first describes the fundamental theoretical construct of compensating wage differentials, which is used by economists to understand the optimal provision of OSH in a perfectly competitive labour market. The plethora of incentives faced by workers and firms in job and insurance markets that determine the ultimate level of OSH are discussed in detail. The extensive empirical evidence from the hedonic wage and stated choice approaches used to assess the value of OSH is reviewed. The causes of inefficiency and inequity in the market for OSH, such as externalities, moral hazard in compensation insurance, systematic biases in individual risk perception/well‐being and labour market segregation are subsequently examined. The implications of government intervention and regulation for tackling the aforementioned inefficiencies in OSH are then considered. Finally, the survey identifies areas of future research interests and suggests indicators and priorities for policy initiatives that can improve the health and safety of workers in modern job markets.     

THE ROLE OF FEES IN PATENT SYSTEMS: THEORY AND EVIDENCE

This paper reviews the economic literature on the role of fees in patent systems. Two main research questions are usually addressed: the impact of patent fees on the behavior of applicants and the question of optimal fees. Studies in the former group confirm that a range of fees affect the behavior of applicants and suggest that a patent is an inelastic good. Studies in the latter group provide grounds for both low and high application (or pre‐grant) fees and renewal (or post‐grant) fees, depending on the structural context and policy objectives. The paper also presents new stylized facts on patent fees of 30 patent offices worldwide. It is shown that application fees are generally lower than renewal fees, and renewal fees increase more than proportionally with patent age.     

THE PRIVATE FINANCING OF NHS HOSPITALS: POLITICS, POLICY AND PRACTICE

This article outlines and critiques the main fiscal and economic rationales for the Private Finance Initiative and examines the impact of the policy on the long-term financial viability of NHS trusts. It concludes that the PFI funding of capital investment is highly problematic. Its high costs can have a negative impact on the finances of health systems.     

CAPITALIZATION AND THE THEORY OF LOCAL PUBLIC FINANCE: AN INTERPRETIVE ESSAY

Abstract. The Tiebout hypothesis that consumer mobility and interjurisdictional competition leads to efficient provision of local services has provoked much controversy and debate in recent years. This article summarizes the opposing and conflicting viewpoints on this subject and presents a synthesis of the theoretical and empirical literature. The basic conclusion of this literature is that only under very restrictive assumptions will foot-voting and interjurisdictional competition ensure allocative efficiency in the local public sector. Nevertheless, the Tiebout mechanism offers important insights for public policy debates on the assignment of taxes and services and the design of equalization grants. Oates' suggestion that capitalization of fiscal differentials into residential property values provides an empirical test of the Tiebout hypothesis also generated an intense debate on the theoretical validity of this procedure and a heightened interest in its empirical applications. This debate is evaluated and an overview is given of the leading empirical approaches to test the efficiency and equity implications of the Tiebout mechanism. Controversial empirical issues such as the choice of the tax price term, the level of aggregation and econometric estimation problems are highlighted in this part of the survey.     

CHILD LABOUR: A REVIEW OF RECENT THEORY AND EVIDENCE WITH POLICY IMPLICATIONS

In recent years, a growing number of authors have turned their attention to the question of why children work. The purpose of this paper is to review some of the more recent theoretical and empirical research into the topic of child labour, and to illustrate the fact that no one factor on its own can account for the phenomenon of child labour. Therefore, policies aimed at eradicating child labour will need to address the broad range of underlying factors that contribute to the incidence of child labour, such as poverty, market imperfections and access to education.     

THE CAUSAL LINK BETWEEN FINANCIAL INCENTIVES AND WEIGHT LOSS: AN EVIDENCE‐BASED SURVEY OF THE LITERATURE

Obesity and overweight are linked to diseases that cost society a significant amount of resources. While behavior modification can reduce the problem, instigating such lifestyle changes is an uneasy task. One potential way to reduce the problem is through the use of financial incentives. In this survey, we review the available evidence, properly emphasizing studies that credibly yield meaningful estimates of the effect of financial incentives on weight loss. We find that the scientific literature on the subject has not yet satisfactorily settled whether such a mechanism is effective at eliciting the desired behavioral and health outcomes. We therefore advocate a rigorous large‐scale randomized experiment to provide reliable estimates of the effect.     

BRIDGING TRADE THEORY AND LABOUR ECONOMETRICS: THE EFFECTS OF INTERNATIONAL MIGRATION*

Abstract This paper surveys current theoretical and empirical research on international migration with a particular emphasis on the links between trade theory and labour empirics.     

CONTRACTS,ENTREPRENEURS, MARKET CREATION AND JUDGEMENT: THE CONTEMPORARY MAINSTREAM THEORY OF THE FIRM IN PERSPECTIVE

This survey gives an overview of the theory of the firm as it is formulated within the contemporary ‘mainstream’ of economics. Two groupings of theories are briefly discussed: principal–agent and incomplete contract models. Next, three of the most recent contributions regarding firms are considered. The reference point approach is looked at first followed by a discussion of Spulber's book The Theory of the Firm. Last, we consider the entrepreneurial judgement perspective.     

AUTOREGRESSIVE CONDITIONAL DURATION MODELS IN FINANCE: A SURVEY OF THE THEORETICAL AND EMPIRICAL LITERATURE

Abstract.  This paper provides an up-to-date survey of the main theoretical developments in autoregressive conditional duration (ACD) modeling and empirical studies using financial data. First, we discuss the properties of the standard ACD specification and its extensions, existing diagnostic tests, and joint models for the arrival times of events and some market characteristics. Then, we present the empirical applications of ACD models to different types of events, and identify possible directions for future research.