When parents with concave utility reward good behaviour on the part of their children with a share of the marginal utility they derive from good behaviour, a decrease in good behaviour by kid i causes kid j to increase the amount of good behaviour he/she supplies in equilibrium. This may explain...

The necessary admissible range of subsidy-free prices is bounded from above by the incremental scope economy measure for the service - the difference between total scope economies and the scope economies associated with the complement of the service. These incremental scope economy measures...