Time and uncertainty in resource dilemmas: equilibrium solutions and experimental results

Most common pool resource (CPR) dilemmas share two features: they evolve over time and they are managed under environmental uncertainties. We propose a stylized dynamic model that integrates these two dimensions. A distinguishing feature of our model is that the duration of the game is determined endogenously by the users’ collective decisions. In the proposed model, if the resource stock level below which the irreversible event occurs is known in advance, then the optimal resource use coincides with a unique symmetric equilibrium that guarantees survival of the resource. As the uncertainty about the threshold level increases, resource use increases if users adopt decision strategies that quickly deplete the resource stock, but decreases if they adopt path strategies guaranteeing that the unknown threshold level is never exceeded. We show that under relatively high uncertainty about resource size, CPR users frequently implement decision strategies that terminate the game immediately. When this uncertainty is reduced, they maintain a positive resource level for longer durations.     

Evaluating the impact of agricultural extension on farms' performance in Crete: a nonneutral stochastic frontier approach

This article attempts to integrate the production‐ and the efficiency‐based approaches for evaluating the impact of extension on farms' performance. For this purpose the nonneutral production frontier model is used, and the empirical analysis refers to a sample of farms from Crete, Greece. The empirical results support the proposed formulation instead of either the production‐ or the efficiency‐based formulations as extension was found to have a statistically significant effect on closing both the technology and management gaps. Public and private extension services were found to be competitive in the production function and complementary in the technical inefficiency effect function. In addition, farms using both public and private extension services achieved a higher degree of technical efficiency than those using either public or private extension services, and farms with no extension services were found to be the least efficient.     

POVERTY AND INCOME INEQUALITY IN LATIN AMERICA DURING THE 1980s

On average, poverty and income inequality increased in Latin America during the 1980s. Forty-six percent of the increase in poverty took place in the cities of Brazil alone, though part of this reflects the migration of poor rural inhabitants to urban areas. There is strong evidence that both income inequality and poverty mirrored the economic cycle, rising during recession and falling during recovery. Economies that grew (e.g. Colombia, Costa Rica) performed better with respect to poverty and income inequality than those that stagnated. In particular, countries that failed to stabilize effectively (e.g. Brazil, Peru) experienced substantial increases in poverty. Educational attainment has the greatest correlation with both income inequality and the probability of being poor. From a policy standpoint, there is a clear association between the provision of education, lessening of income inequality, and poverty reduction.     

On an anomaly of the deterrent effect of punishment

A two period choice problem is presented. An individual has to choose in each period between legal and illegal activities. Two punishment policies are compared: (1) The maximal punishment is imposed even for a first offense. (2) A new offender gets a reduced punishment. It is proved that for a given policy of type 1 there exist a utility function and a policy of type 2 which yields a better deterrent on individual characterized by this utility function.     

Patents and R&D at the firm level: A first report

The U.S. Patent Office has recently computerized its data base. Thus an easily accessible rather direct indicator of the inventive output of firms is now available. We examine the sense in which the patent measure is a ‘good’ indicator of inventive activity by relating it to the R&D expenditures of a cross-section of 121 firms over an 8 year period.     

A Ricardian Analysis of the Distribution of Climate Change Impacts on Agriculture across Agro-Ecological Zones in Africa

This paper examines the distribution of climate change impacts across the sixteen Agro-Ecological Zones (AEZs) of Africa. We combine net revenue from livestock and crops and regress total net revenue on a set of climate, soil, and socio-economic variables with and without country fixed effects. Although African crop net revenue is very sensitive to climate change, combined livestock and crop net revenue is more climate resilient. With the hot and dry CCC climate scenario, average damage estimates reach 27% by 2100, but with the mild and wet PCM scenario, African farmers will benefit. The analysis of AEZs implies that the effects of climate change will be quite different across Africa. For example, currently productive areas such as dry/moist savannah are more vulnerable to climate change while currently less productive agricultural zones such as humid forest or sub-humid AEZs become more productive in the future. S. Niggol Seo is the Consultant to the World Bank.     

An unpleasant dilemma for contemporary general equilibrium theory

By examining the contributions of two prominent contemporary neoclassical economists, i.e. Lucas and Hahn, the article attempts to shed light on the problematic relationship between neoclassical theory and observation. It is argued that this approach must face the unpleasant dilemma of having to choose between endowing general equilibrium theory with an explanatory role that is marred by its illegitimate notion of capital as a single factor of variable form (Lucas); or alternatively, to consistently treat each capital good as a distinct factor of production, with the bitter implication that the theory must simply renounce to have a correspondence with observation (Hahn).     

THE REGULATION OF MORTGAGE SERVICING: LESSONS FROM THE FINANCIAL CRISIS

Pivotal litigation against the largest subprime mortgage servicer in the United States provides lessons about the appropriate regulation of mortgage servicing and adds to research about the causes of the financial crisis. Mortgage servicing is essential to the functioning of the financial system so servicers must be held to a high standard. The litigation revealed egregious practices but was settled quickly for a nominal amount and provided the servicer a very broad release of liability, allowing it to expand without correcting serious problems, and created significant wealth gains for the parent firm. Regulatory authority should not be split between agencies. (JEL G28, G21, K40)     

A computational framework for analyzing dynamic auctions: The market impact of information sharing

This article develops a computational framework to analyze dynamic auctions and uses it to investigate the impact of information sharing among bidders. We show that allowing for the dynamics implicit in many auction environments enables the emergence of equilibrium states that can only be reached when firms are responding to dynamic incentives. The impact of information sharing depends on the extent of dynamics and provides support for the claim that information sharing, even of strategically important data, need not be welfare reducing. Our methodological contribution is to show how to adapt the experience-based equilibrium concept to a dynamic auction environment and to provide an implementable boundary-consistency condition that mitigates the extent of multiple equilibria.     

Formal and Informal Markets for Water: Institutions, Performance, and Constraints

Water markets—either formal or informal—can be anefficient method for reallocating scarce water supplies. Atthe same time certain constraints can raise the transactioncosts of trading water. This paper reviews the conditions necessaryto establish successful water markets, identifies potentialproblems, and offers mitigating strategies. It also uses examplesof several informal and formal water markets already in operationto illustrate these problems and the solutions to them.