economically optimal cutting cycle in a beech forest, iranian caspian forests

the aim of this study was to determine the optimal cutting cycle in an uneven-aged beech forest in the north of iran. first of all, a logistic growth model was determined for an uneven aged forest. then, the stumpage price was predicted via an autoregressive model. the average stumpage price of beech was derived from actual timber, round wood, fire and pulpwood prices at road side minus the variable harvesting costs. price and growth models were used in order to determine the optimal cutting cycle under different rates of interest and setup costs. the faustmann?s model was used for optimal cutting cycle. the results indicated that the optimal cutting cycle will decrease if the rate of interest increased. the results also indicated that if the setup costs increase, the optimal cutting cycle will also increase.