This paper looks at land policy optimization, resulting in sustainable effectiveness and efficiency, and reflects the Singapore Land Authority (SLA)’s land proprietary power for land alienation to large land-using economic policy options. Such land policy optimization comprises the marginal opportunity cost of land (MOCL) conceptual model, and the policy input-output analytical (PIOA)model under the ‘Additionality (additional impact)’ concept. In the MOCL model, a large land-using office complex competes with other large land-using industrial, retail, port complexes or housing. Land productivity for the land-using office complex is compared with land productivity for other land-using complexes, after the office complex is installed. The PIOA model is concerned with the hierarchical and structural definition of policy, while ‘Additionality’ examines land-policy output variables impacting SLA’s broader land policy efficiency and effectiveness goals, their associated output indicators and the interaction with the macro-economy. Analysis is based on the expectation that land policy conforms to a structural definition, itself a function of specific objectives that sustain land policy effectiveness and efficiency.

Keywords: marginal opportunity cost of land, additionality, land policy input and output analytical model and land use optimization.