Dynamic pollution regulation

This paper examines pollution regulation in a dynamic setting with complete information. We show that tradeable pollution permits may not achieve the social optimum even when the permit market is perfectly competitive. The reason is that the optimal tradeable permits regulation will typically be time inconsistent. We then show that pollution taxes can achieve the first best and are time consistent.We thank Claudio Mezzetti, Wally Oates, and Paul Rhode for helpful comments. The last two authors thank the National Science Foundation for financial support.     

Invariant risk attitudes

Concepts of constant absolute risk aversion and constant relative risk aversion have proved useful in the analysis of choice under uncertainty, but are quite restrictive, particularly when they are imposed jointly. A generalization of constant risk aversion, referred to as invariant risk aversion is developed. Invariant risk aversion is closely related to the possibility of representing preferences over state-contingent income vectors in terms of two parameters, the mean and a linearly homogeneous, translation-invariant index of riskiness. The best-known index with such properties is the standard deviation. The properties of the capital asset pricing model, usually expressed in terms of the mean and standard deviation, may be extended to the case of general invariant preferences.     

Fiddling while carbon burns: why climate policy needs pervasive emission pricing as well as technology promotion*

Effective climate policy requires global emissions of greenhouse gases to be cut substantially, which can be achieved by energy supply technologies with lower emissions, greater energy use efficiency and substitution in demand. For policy to be efficient requires at least fairly uniform, fairly pervasive emission pricing from taxes, permit trading or combinations of the two; and significant government support for low‐emission technologies. We compare the technology‐focused climate policies adopted by Australia and the ‘Asia–Pacific Partnership on Clean Development and Climate’ (AP6), against this policy yardstick. We find that such policies omit the need for emission pricing to achieve abatement effectively and efficiently; they over‐prescribe which abatement actions should be used most; they make unrealistic assumptions about how much progress can be achieved by voluntarism and cooperation, in the absence of either adequate funding or mandatory policies; and they unjustifiably contrast technology‐focused policy and the Kyoto Protocol approach as the only two policies worth considering, and thus ignore important policy combinations.     

Bargaining Power and Efficiency in Insurance Contracts

Insurance contracts are frequently modelled as principal–agent relationships. The purpose of this paper is to examine the interaction between differential bargaining power and the efficiency of insurance contracts. The analysis is undertaken in a framework of state-contingent production, which allows us to consider, as separate choices, the level of effort committed by the client and the riskiness of the equilibrium state-contingent production vector. Our central result is that, in the presence of hold-up problems, the exercise of monopoly power by insurers leads clients to undertake socially costly self-protection, leading to suboptimal levels of insurance. Clients can exploit information asymmetries to offset the bargaining power of the insurer, but this process is also socially costly. Hence, competitive markets for insurance will yield a Pareto-superior outcome to the constrained Pareto-optimum reached in markets where insurers have monopoly power. More generally, in a bargaining situation, an increase in the bargaining power of clients will increase social welfare.     

Evaluating Airline Deregulation in Australia

It has frequently been claimed that the cost of air travel in Australia has fallen by around 20 per cent in real terms since the end of the Two Airline agreement. However, this claim rests on a misinterpretation of price data. In this article, an analysis based on the theory of price indexes is presented. It is concluded that the representative passenger has probably experienced a small reduction in the cost of air travel since deregulation. Some additional benefits have flowed from the expansion of frequent flyer schemes, and from increased frequency of service. The distributional effects of deregulation are unclear, but are probably favourable on balance. The Australian airline industry is a natural duopoly and the market is not contestable. Therre is no evidence of dynamic efficiency gains arising from deregulation. The observed effects of deregulation are consistent with the predictions of neoclassical microeconomic theory.     

Estimating the Benefits of Hilmer and Related Reforms

The Industry Commission's 1995 study of the growth and revenue implications of Hilmer and related reforms has been influential in the debate over microeconomic reform. In addition to reform of Telstra, Australia Post, the Federal Airports Corporation, the Civil Aviation Authority, state electricity, gas and water authorities, and rail, road and port authorities, the Commission examined a broad-ranging program including competitive tendering for the provision of public services, deregulation of the building industry and a move to self-regulation of industries such as meat processing. The Commission estimated that the implementation of these reforms would result in a 5.5 per cent increase in GDP. In this paper, the Commission's analysis is subjected to a detailed critique. It is argued that most of the estimated productivity gains are overoptimistic, representing upper bounds to possible achievement rather than likely outcomes. Furthermore, it is argued that the dominant flow-on effects of microeconomic reform will be negative, arising from the fact that at least some of the workers directly displaced by reform will be permanently displaced from the employed labour force.     

Drought policy: a graphical analysis*

The standard approach to modelling production under uncertainty has relied on the concept of the stochastic production function. In the present paper, it is argued that a state‐contingent production model is more flexible and realistic. The model is applied to the problem of drought policy.     

Separability of stochastic production decisions from producer risk preferences in the presence of financial markets

Separation results, as they are usually understood, refer to conditions under which a firm’s production decisions are independent of its risk attitudes. Well-understood situations where separation occurs typically include those where technically feasible production opportunities are replicable in financial markets. This paper gives necessary and sufficient conditions for separation that go beyond these well-understood spanning conditions. To do so, we present a unified treatment of the production and financial decisions available to a firm facing frictionless financial markets and a stochastic production technology under minimal assumptions about the firm’s technology and objective function.     

Early evacuation is the best bushfire risk mitigation strategy for south‐eastern Australia

Given the large and increasing bushfire threat to lives and property in Australia, there is a need for economic evaluation of risk mitigation policies that can be implemented by governments and homeowners. Three broad policies applicable for existing at‐risk communities are evaluated: expanded use of landscape‐scale prescribed fire; home ignition zone treatment (bushfire defence sprinklers); and early evacuation when a bushfire is burning on extreme or catastrophic fire danger days. Early evacuation is the only option that yields net economic benefits relative to existing policy.