The study looked at how land use zoning regulations can improve general land use planning on a country-wide scale. The researchers found that the current system of yearly land supply programs is too rigid and doesn't work well at the county level. By focusing on land use zoning regulations instead, the planning process can be more effective and better aligned with the law. This approach doesn't require yearly land supply programs but focuses on controlling the quantity and quality of land. To make this work, a strong legal framework and advanced techniques are needed.