This paper presents findings from an analytical scheme that offers a promising alternative to traditional procedures of modeling acreage response. The scheme addresses the two-step decision process in which program and nonprogram planting decisions are modeled separately, conditional on the decision to participate. This provides a more realistic and intuitive portrayal of producers' decision making process. The model is applied at the regional level to assess the impact of farm programs on acreage response for corn in the Cornbelt and Lake States, and for wheat in the Northern Plains. The impacts of policy variable changes on participation and planted acreage are also analyzed.