Modeling Field-Level Conservation Tillage Adoption with Aggregate Choice Data
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This empirical study of conservation tillage adoption relies on the logit model applied to fieldlevel
information on agents’ attributes and county-aggregated measures of agents’ choices. The
methodology treats the aggregated data as an expected value—the area-weighted group average of
individual probabilities of choosing conservation tillage—subject to a measurement error. Using
2002 and 2004 data for Iowa, we estimate field-level costs of the adoption of conservation tillage.
The results indicate that adoption is significantly affected by soil characteristics and crop rotation
and highlight the heterogeneity in adoption costs when controlling for these characteristics.