This study uses a marginal treatment effects approach and farm household rice survey data from Northern Ghana to examine the heterogeneous effects of agricultural technologies on household welfare. Results indicate significant heterogeneity in the gains from the adoption of improved rice technologies among farmers. We found significant evidence of a pattern of positive selection on unobserved gains from the adoption of agricultural technologies on rice yield and household dietary diversity scores (HDDS). Moreover, the policy-relevant treatment effects suggest that reducing the distance to sources of agricultural technologies increases rice yield and HDDS through technology adoption.