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The paper tests Hotelling's prediction that scarcity rent for a non-renewable resource will rise at the rate of discount in a market equilibrium. We perform the test using data for old-growth timber, a resource that is effectively non-renewable. In contrast to previous studies, for this resource a measure of scarcity rent is directly observable in the form of stumpage price bids in timber auctions. We construct a model that allows for replanting and captures the institutional framework of the western U.S. timber market. The modified Hotelling rule that we derive is not rejected in several of our specifications.

Since Hotelling's seminal paper on the optimal depletion of exhaustible resources, much has been published; yet confusion remains about whether scarcity rent and price increase or decrease as a resource is depleted when costs tend to rise with depletion. We show that Hotelling's fundamental results of rising scarcity rent and price paths are sustained and that the path of scarcity rent converges on the r per cent rule, provided the objective function is concave. Predictions of non-monotonic or declining scarcity rent paths are due to implicit assumptions that lead to a non-concave objective function. We identify the sources of these non-concavities. JEL Classification: Q30, D90, C60

Examines the potential for applying economic instruments to address environmental problems in Canadian agriculture. Effect of agricultural production on the environment; Environmental instrument design issues; Economic instruments to achieve environmental objectives in agriculture.