Biodiversity,natural resource accounting and ecological monitoring

The role that natural resource accounting and ecological monitoring can play in conserving biological diversity is discussed. There exists a widespread view that modifications to national income accounting procedures are crucial to the pursuit of sustainability and particularly the protection of biodiversity. However, we argue that the availability of biologically-adjusted national income figures would not, of itself, be likely to contribute significantly to the protection of biological resources. The conservation of biodiversity requires, among other things, a significantly improved understanding of the nature of environmental changes arising from imposed management regimes and the effects that these changes have on the persistence of biodiversity. On this basis, and in the context of sustainable development, we suggest that ecological monitoring should take priority over the generation of economic data.In many regions of the world sufficient ecological knowledge is available to design and implement integrated monitoring networks that can be used to track the status of many components of biodiversity and inform decisions taken over their management. We outline how this might be undertaken using a hierarchical and prioritised approach aimed, pragmatically, in the first instance at helping to preserve those ecosystems, communities and species which are perceived to be most threatened. Some emphasis is given to the Australian situation because it is the only rich megadiversity nation and it is at the forefront of the development of scientific techniques that can be used to help design soundly-based and cost-effective monitoring programs.We acknowledge the useful comments of two referees, and claim exclusive property rights in remaining errors.     

OLIGOPOLISTIC PRODUCT WITHHOLDING IN RICARDIAN MARKETS

We consider strategic behaviour in the rental market for quality-differentiated goods. In his classic analysis Ricardo showed that at the competitive equilibrium the price of the marginal unit is driven to zero. An oligopolistic market structure usually leads to a radically different equilibrium. Deliberate withholding of units often becomes part of a firm's best response, and whenever this occurs, a pure strategy equilibrium fails to exist. A necessary but not sufficient condition for a pure strategy equilibrium to exist is for one firm to own all the best quality units. A mixed strategy equilibrium always exists and the associated payoff is aiways greater than the competitive payoff.     

The Valuation of Assets under Moral Hazard

The design of managerial incentive contracts is examined in a setting in which economic agents are risk averse, and the actions of managers can affect asset returns which contain both systematic and idiosyncratic risks. It is shown that in the absence of moral hazard, owners of assets will insure managers against idiosyncratic risks, but with moral hazard, contracts will depend on both systematic and idiosyncratic risks. The traditional recommendation of asset pricing models, namely, to focus only on systematic risks, is thus proved to be valid only when there is no moral hazard. The major empirically testable predictions of the model are (1) managerial incentive contracts will generally depend on systematic as well as idiosyncratic risks, (2) idiosyncratic risks will generally be important in investment decisions, (3) the managers of firms with relatively high levels of idiosyncratic risks will have compensations that are less dependent on their firms' excess returns, and (4) the compensations of managers of larger firms will be relatively more dependent on the excess returns of their firms.     

Strengthening the weak link in strategic executive development: Integrating individual development and global business strategy

The global business environment of the 1990s provides both challenge and opportunity to human resource development to become an integral player in helping implement business strategy. The results of two best practice studies suggest that some leading firms such as 3M and Motorola are doing just that. At these companies current strategic business issues are the drivers of flexible and opportunistic executive development activities. Naturally occurring on-the-job experiences are consciously utilized in such a way that helping executives to develop becomes an integral part of conducting business. The implications of linking executive development to business strategy for practice and for future research are discussed. © 1995 by John Wiley & Sons, Inc.     

The Relationship between Bankruptcy Model Predictions and Stock Market Perceptions of Bankruptcy

This study uses a cumulative sum technique to determine the point at which the stock market first perceives that a firm may file for bankruptcy. The study then attempts to identify information, whether from financial statements or from other sources, that may have influenced the market in its reassessment of the firm's prospects. The results indicate that the switching point of the mean and variance of stock returns appears to be related both to financial statement information (as measured by changes in bankruptcy model probability assessments) and the release of unfavorable news in the Wall Street Journal.     

Economies of scope and economies of agglomeration

Agglomeration economies are economies external to the firm, and plant, but internal to a particular location. In this paper the notion of agglomeration economies is formally investigated. The implications of the concept for urban structure and industrial organization are then traced. Under specified considerations, weak economies of agglomeration, as defined in this paper, are shown to be necessary for the existence of an urban area.