Evolution of Harvesting Strategies: Replicator and Resource Dynamics

Economic theories of managing renewable resources, such as fisheries and forestry, traditionally assume that individual harvesters are perfectly rational and thus able to compute the harvesting strategy that maximizes their discounted profits. The current paper presents an alternative approach based on bounded rationality and evolutionary mechanisms. It is assumed that individual harvesters face a choice between two harvesting strategies. The evolution of the distribution of strategies in the population is modeled through a replicator dynamics equation. The latter captures the idea that strategies yielding above average profits are demanded more than strategies yielding below average profits, so that the first type ends up accounting for a larger part in the population. From a mathematical perspective, the combination of resource and evolutionary processes leads to complex dynamics. The paper presents the existence and stability conditions for each steady-state of the system and analyzes dynamic paths to the equilibrium. In addition, effects of changes in prices are analyzed. A main result of the paper is that under certain conditions both strategies can survive in the long-run

The effects of competition on the quality of primary schools in the Netherlands

We investigate the impact of competition between primary schools on the quality of education in the Netherlands. Do schools facing more competition in their neighbourhood perform better than schools facing less competition? As a measure of school quality, we look at the performance of pupils at the nationwide standard test (the so-called Cito test) in the final year of primary education. Since competition is likely to be endogenous to the quality of schools, we use the distance between the school and the town centre as an instrument for the level of competition faced by a school. The intuition is that schools located close to the town centre, which are easily accessible to a large number of parents, face more competition than schools located further away from the town centre. Using a large range of data on pupil, school and market characteristics, we find that school competition has a small positive significant effect on pupil achievement. An increase in competition by one standard deviation (comparable to 5 additional schools in the market) increases pupil achievement at the Cito test by five to ten percent of the mean standard deviation, so about less than one point. This result is robust to a large range of specifications

Improving the Energy-Efficiency of Buildings: The Impact of Environmental Policy on Technological Innovation

This paper investigates the impact of alternative environmental policy instruments on technological innovations aiming to improve energy-efficiency in buildings. The empirical analysis focuses on three main types of policy instruments, namely regulatory energy standards in buildings codes, energy taxes as captured by energy prices and specific governmental energy R&D expenditures. Technological innovation is measured using patent counts for specific technologies related to energy-efficiency in buildings (e.g. insulation, high-efficiency boilers, energy-saving lightings). The estimates for seven European countries over the 1989-2004 period imply that a strengthening of 10% of the minimum insulation standards for walls would increase the likelihood to file additional patents by about 3%. In contrast, energy prices have no significant effect on the likelihood to patent. Governmental energy R&D support has a small positive significant effect on patenting activities

Evolution of Harvesting Strategies: Replicator and Resource Dynamics

Economic theories of managing renewable resources, such as fisheries and forestry, traditionally assume that individual harvesters are perfectly rational and thus able to compute the harvesting strategy that maximizes their discounted profits. The current paper presents an alternative approach based on bounded rationality and evolutionary mechanisms. It is assumed that individual harvesters face a choice between two harvesting strategies. The evolution of the distribution of strategies in the population is modeled through a replicator dynamics equation. The latter captures the idea that strategies yielding above average profits are demanded more than strategies yielding below average profits, so that the first type ends up accounting for a larger part in the population. From a mathematical perspective, the combination of resource and evolutionary processes leads to complex dynamics. The paper presents the existence and stability conditions for each steady-state of the system and analyzes dynamic paths to the equilibrium. In addition, effects of changes in prices are analyzed. A main result of the paper is that under certain conditions both strategies can survive in the long-run. This discussion paper has resulted in a publication in the Journal of Evolutionary Economics , 2003, 13(2), 183-200.Evolutionary Economics - Renewable Resources - Common-Property Resource - Fishery