Under the AttCon modeling approach, both conservation and development are computer allocated. The amounts and allowed locations are adjustable parameters.
For PFLCC Scenarios, we varied both the strategy and amount of conservation, considering both conventional purchase ("fee simple") and conservation easements. Conservation amounts were based on expert interviews, and represent a cost discount per acre for strategies based on easements. While the exact ratio varies widely by project type and size, the historic record for Florida shows that conservation easements typically cost 60% of the outright purchase price. This allows the public's conservation dollars to go further, which we simulated as a constant budget with increased acreage purchasing power. For Scenario 3, we added a constraint on conservation easements based on parcel size. This was based on the observation that negotiation of easements is a relatively expensive and laborious process, not generally well suited for small parcels.