This paper is devoted to assessment of policy mix impacts regarding nitrogen pollutants. The analysed policy combines a tax on the nitrogen input and incentives promoting perennial crops assumed to be low input ones. We show that perennial crop subsidy increases significantly the tax efficiency,...

Many environmental problems are due to damages caused by stock of pollutants which accumulate with time lag to their emission. In this paper, we focus on nitrates used in agriculture which can pollute groundwater years after their initial use. A dynamic optimal control problem with heterogeneous...

This paper assesses the cost-effectiveness of a mixed policy in attempts to curb three nitrogen pollutants: NO3, N20 and NH3. The policy under study combines an N-tax on nitrogen input and incentives promoting perennial crops assumed to require low input. We show that opting for a perennial crop...