Marginal Analysis of Income Mobility Effects by Income Source with an Application to the Agricultural Policy Mix

The Note makes novel use of a decomposition of the Shorrocks mobility index by income source to identify the impact on farm income mobility of a marginal change in each component of income. An empirical application shows that a revenue‐neutral change in the balance of agricultural protection between market‐based support and direct payments would not have reduced the variability of relative farm incomes in Scottish agriculture.