Research from all publishers Recent investigations have underscored the potential of variable rate control systems to refine the effectiveness of fertiliser applications.

KEVIN A. CLARKE, The Phantom Menace: Omitted Variable Bias in Econometric Research, Conflict Management and Peace Science, Vol. 22, No. 4, SPECIAL ISSUE: Model Specification and Control Variables ...

We submit our recent systemic democratic peace research to the control variable doctrine of James Lee Ray, as codified in his 2003 treatise. In particular, we seek to determine whether international ...