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This note incorporates ecological interactions into the Noah's Ark problem. In doing so, we arrive at a general model for ranking in situ conservation projects accounting for species interrelations and provide an operational cost-effectiveness method for the selection of best preserving diversity projects under a limited budget constraint.
Many scholars argue that environmental issues can be addressed through technological innovation, a proposal which echoes a lasting debate between environmental and ecological economics about the substitution rate between natural and manufactured capital. In addition to these two established types of capital, this paper introduces the idea of ‘behavioral capital’. We define behavioral capital as the latent potential of behavioral change to affect improvement in environmental quality. Our contribution argues that technological and traditional regulatory innovations serve as insufficient tools for addressing modern environmental issues and ensuring sustainable development. Without discarding these solutions, we contend that because human behavior is a significant contributor to environmental problems, it should be regarded as a key component of continued solutions. We suggest that the dual interest theory can serve as an integrative framework for behavioral innovations related to environmental issues. In suggesting this, we assume that behavioral innovations can both overcome some of the limitations of technological innovations and offer new solutions. Our main insight is to suggest that some depletion of natural capital – but not all – can be offset by behavioral changes without decreasing, or even increasing, subjective well-being.
Economists recognize that monetary incentives can backfire through the crowding-out of moral and social motivations leading to an overall decrease of the desired behavior. We implement a field experiment where participants are asked to fill a questionnaire on pro-environmental behaviors under different incentive schemes, either with no monetary incentive (control) or with low or high monetary incentive directed either to the respondents or to an environmental cause. We investigate whether (i) there is a significant crowding-out effect, (ii) directing monetary incentive to the cause rather than to the respondents reduces the overall impact of a crowding-out effect, and (iii) offering the choice regarding the money recipient a ects participation. Except for a high monetary incentive where the respondent chooses himself the end-recipient, we show that monetary rewards directed either at the individual or at the cause actually harms intrinsic motivations, but not to the same extent. We formalize our results building on an adaptation of an original model by Bolle and Otto (2010) and introduce agents heterogeneity in terms of intrinsic motivation. This heterogeneity has key implications for the understanding of the crowding-out e ect. Several policy recommendations regarding the use of market-based instruments are drawn. (This abstract was borrowed from another version of this item.)
Two countries strategically invest in productive infrastructure within a general equilibrium model with endogenous growth. These public investments generate externalities. Dynamic analysis reveals that: (1) under constant returns, the two countries growth rates differ during the transition but are identical on the balanced growth path, (2) a country with decreasing returns can experience sustained growth provided that the other country grows at a positive constant rate, (3) cooperation does not necessarily lead to higher growth for each country, and it can increase or decrease the gap between countries growth rates depending on the countries consumption preferences regarding domestic and foreign goods.
We develop a model that accounts for the decay of the average contribution observed in experiments on voluntary contributions to a public good. The novel idea is that people's moral motivation is "weak." Their judgment about the right contribution depends on observed contributions by group members and on an intrinsic "moral ideal." We show that the assumption of weakly morally motivated agents leads to the decline of the average contribution over time. The model is compatible with persistence of overcontributions, variability of contributions (across and within individuals), the "restart effect" and the observation that the decay in contributions is slower in longer games. Furthermore, it offers a rationale for conditional cooperation. (This abstract was borrowed from another version of this item.)
No abstract is available for this item.
Chichilnisky's criterion for sustainability has the merit to be, so far, the unique explicit, complete and continuous social welfare criterion that combines successfully the requirement of Weak Pareto with an instrumental notion of intergenerational equity (no dictatorship of the present and no dictatorhsip of the future). But it has one important drawback: in the context of renewable resources, there exists no exploitation path that maximizes this criterion. The present article suggests a way to cope with this weakness. We give good reasons to restrict admissible controls to the set of convex combinations between the discounted utilitarian program and the golden rule program. It is shown that optimal paths in this set exists under rather weak sufficient conditions on the fundamentals of the problem. (This abstract was borrowed from another version of this item.)
We examine experimentally how and why voluntary contributions are affected by sequentiality. Instead of deciding simultaneously in each round, subjects are randomly ordered in a sequence which differs from round to round. We compare sessions in which subjects observe the contributions from earlier decisions in each round ("sequential treatment with information") to sessions in which subjects decide sequentially within rounds, but cannot observe earlier contributions ("sequential treatment without information"). We also investigate whether average contributions are affected by the length of the sequence by varying group size. Our results show that sequentiality alone has no effect on contributions, but that the level of contributions increases when subjects are informed about the contributions of lower-ranked subjects. We provide evidence that the so-called "leadership effect" vanishes within rounds, and that group size has no significant impact on the average level of contributions in our sequential contribution games. (This abstract was borrowed from another version of this item.)
The need for a global agreement to the problem of tropical deforestation has led to the REDD (Reducing Emissions from Deforestation and Degradation) scheme, which proposes that the developed countries pay developing countries for CO 2 emissions saved through avoided deforestation and forest degradation. The remaining issue is specifying the rules defining payments to countries that reduce their deforestation levels. This article develops a game-theoretic bargaining model, simulating the on-going negotiation process which is currently taking place within the Convention on Climate Change, after the Copenhagen agreement of December 2009. It shows that the conditions under which developing countries are left to bargain over the allocation of the global forest fundmay lead to an ineffective system of incentives. Below a given level of contributions from the North, the mechanism fails to curb deforestation. Beyond this level, it induces perverse effects: the larger the North's contribution, the larger the deforestation decisions. Consequently, the mechanism is most effective only at a specific threshold, which, given the unobservability of countries'preferences, can only be found by a repeated "trial and error" implementation process.
In two-player games with negative (positive) spillovers it is well-known that symmetric agents both overact (underact) at the Nash equilibria. We show that for heterogeneous agents this rule of thumb has to be amended if the game features strategic substitutability.