The Bioeconomics of Marine Sanctuaries

Consider an offshore fishing grounds of size K. Suppose the grounds has been overfished to the point that net revenue has been driven to zero and the fishery is in open access equilibrium at (X, Y). A marine sanctuary, where fishing is prohibited, is then created. Suppose the marine sanctuary is of size K₂ and that fishing is allowed on a smaller grounds, now of size K₁, where K₁ + K₂ = K. In the first, deterministic, model, the present value of net revenue from the grounds-sanctuary system is maximized subject to migration (diffusion) of fish from the sanctuary to the grounds. The size of the sanctuary is varied, the system is re-optimized, and the populations levels, harvest, and value of the fishery is compared to the 'no-sanctuary' optimum, and the open access equilibrium. In the deterministic model, a marine sanctuary reduces the present value of the fishery relative to the 'ideal' of optimal management of the original grounds. In the second model net growth is subject to stochastic fluctuation. Simulation demonstrates the ability of a marine sanctuary to reduce the variation in biomass on the fishing grounds. Variance reduction in fishable biomass is examined for different-sized sanctuaries when net growth on the grounds and in the sanctuary fluctuate independently and when they are perfectly correlated. For the stochastic model of this paper, sanctuaries ranging in size from 60 to 40% of the original grounds (0.6 K₂/K 0.4) had the ability to lower variation in fishable biomass compared to the no sanctuary case. For a sanctuary equal to or greater than 70% of the original grounds (K₂ 0.7K), net revenue would be nonpositive and there would be no incentive to fish.     

Total factor productivity and R&D capital in the spanish economy, 1965–1980

A formal model of productivity growth and technical progress is presented. The model takes into account embodied and disembodied technical progress as explanatory variables. The slowdown in productivity growth for the Spanish economy after 1972 is explained for 92% by the decline in the rate of growth of technical progress originated from domestic R&D and technology imports.     

A framework for market-based organizational learning: Linking values, knowledge, and behavior

The authors review the concept of organizational learning and present a broad conceptual framework for its modeling. Within this framework, one specific process for market-based organizational learning is postulated. An empirical test of this model leads the authors to conclude that a more positive learning orientation (a value-based construct) will directly result in increased market information generation and dissemination (knowledge-based constructs), which, in turn, directly affects the degree to which an organization makes changes in its marketing strategies (a behavioral construct). Managerial implications are discussed. His research interests lie primarily in the areas of organizational information use and market-based organizational learning. His work has been published in theJournal of the Academy of Marketing Science, Journal of Advertising Research, Journal of Business Research, andJournal of Marketing. His research interests include both individual and organizational learning. He has published in the areas of consumer decision making, advertising effectiveness, and market-based organizational learning. His research interests include organizational marketing and marketing channels. His work has been published in theJournal of Marketing, Journal of Business and Economic Statistics, Journal of Business Logistics, Journal of Purchasing and Materials Management, andJournal of Health Care Marketing.     

The influence of personal and organizational values on marketing professionals' ethical behavior

The authors examine empirically the influence of personal and organizational values on marketing professionals' ethical behavior. The results indicate that personal and organizational values underlie differences in marketing professionals' ethical behavior, albeit small terms of the proportion of explained variance. The results also suggest the relationship between organizational values and ethical behavior to be significant. However, the same is not the case for the relationship between personal values and ethical behavior.Ishmael P. Akaah is Professor of Marketing at Wayne State University, Detroit, Michigan, Professor Akaah's articles have appeared in many journals includingJournal of Marketing Research, International Marketing Review, Journal of Business Logistics, among others.Daulatram B. Lund is Associate professor of Marketing at University of Nevada, Reno. Professor Lund's articles have appeared inJournal of Retailing, Journal of Business Research, Industrial Marketing Management, among others.     

Implementing structure and control over unofficial inventories in a multispecialty group practice

Materiel managers have been in control of most aspects of the supply chain except for the inventories of the end users, which account for 70 percent of the inventory supply dollars. When the Materials Manager at Lexington Clinic in Lexington, Kentucky, was approached by the Clinic's Chief Executive Officer to implement cost containment measures, the Materials Manager seized the opportunity to implement a six-step program aimed at controlling those supply dollars. Through requisition training, enforcing approval levels, limiting the number of requisitioners, and establishing par levels on floor inventories, the clinic's "unofficial" inventory supply dollars were reduced by 7 percent in the first 12 departments where the par levels were established. The program was hailed as a tremendous success and a positive experience for everyone, from nurses to warehouse clerks.