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International Conference
BUILDING
INSIGHTS OF MANAGERIAL ECONOMICS AND ACCOUNTING TOWARDS SUSTAINABLE FOREST
MANAGEMENT May 17 19, 2007
IUFRO Unit 4.05.00 - Managerial Economics and AccountingIUFRO Unit 4.05.01 - Managerial, social and environmental accounting IUFRO Unit 4.05.02 - Managerial economics |
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Email: peyron@gip-ecofor.org
The forest economic analysis is based on the models of biological, economic and social nature, and in particular, on three basic models which are the stand dynamic model, the price model and the decision model. Theses models are often calibrated for only one stand structure (even-aged or uneven-aged). However, because of changes in environment (global changes), in economy (energy prices), in human society (social expectations), the forest manager has more and more to manage stands that are in transition between even-aged and uneven-aged structures, and forests with stands of different structures. This is why it becomes necessary to model the management of even-aged, uneven-aged and in conversion stands, in the presence of catastrophic risk or not.
A first step of this approach studies successively the stand dynamic model, the price model and the decision model in risky situations and even or uneven-aged stand structures. It then articulates these models to constitute an overall theoretic model, suitable for applying, with the help of an adapted calibration, for various species on diverse sites. An example comes to illustrate the theoretical analyses in the case of the beech in the North-East of France and to give an idea of the potential results on the scales of the stand and tree. The illustrations on the stand scale consist in studying the case of the even-aged and uneven-aged stands, and the case of conversion, in presence or absence of risk. In order to show the interest of these combined models at the tree scale, an illustration relates to the economy of the tree, placed in various environments: different productivities, presence or absence of risk and different price-size curves.
One interest of this approach is in the will to take of growth modelling only what seems very necessary to the economist. Another interest consists in avoiding the classic dichotomy between even-aged and uneven-aged stand structures. This work makes it possible to carry out a certain number of progresses on integration of volume and value functions, on change of economic management scale (of tree to stand) and on uneven-aged, even-aged and in conversion stand management.
