Qualitative change is widely recognized as a defining feature of evolution. Schumpeter and Georgescu-Roegen put it at the center of their methodological reasoning. I revisit important contributions of these two authors, paying attention to the immediate relationship of the major traits and...

[paper in French] The article offers to describe and analyse the economic motivations for creating and operating observatories of agricultural practices. An observatory is a unit provided with technical, financial and human means as well as information and data, and which uses them to produce...

[paper in French] Wild-boar can be considered both as a resource and as a pest. It causes collective damages and is also valued resource for recreative activity as hunting. The paper treats the economy of controlling a hunting game. A bio-economic model is presented and used for the analysis....

[Paper in French] In this article, we investigate the economic impacts of agricultural wetlands for farms in the Limousin region in France. We developed a microeconomic model of farmers' behavior assuming that they maximize their profit. This theoretical model was then specified econometrically...

[Paper in French] The European Union (EU) has gradually increased the importance of environmental issues in the objectives and instruments of the Common Agricultural Policy (CAP). Agro-environmental schemes, enforced within all of the Member States since the 90’s, are contracted by the farmers...

Agri-environmental schemes are the main policy instrument currently available in the European Union to promote environmentally friendly farming practices. Nevertheless, the adoption rate of these measures is still limited. This paper develops a profit maximizer theoretical framework to explain...

Differences between part-time farmers and full-time farmers are examined both theoretically and empirically. We develop the hypotheses that capital to labour ratio, labour productivity in the provision of both private and public goods, and agri-environmental payments received are higher for...

[paper in French] Big game is seen as both a resource and a pest. They are valued by hunters and responsible for collective economic damage. The article aims at characterizing the collective optimum using natural resource economics. We analyze the optimal game management using a bio-economic...