We characterize three classes of demand systems, all of which are defined nonparametrically: homothetic demand systems with a single aggregator (HSA), those with direct implicit additivity (HDIA), and those with indirect implicit additivity (HIIA). For any number of goods, all the cross-price...

The Kaldor-Verdoorn law refers to a positive but less than one-for-one relationship between the growth rates of output and labor productivity, with causality running from the former to the latter. Empirical research has affirmed such a relationship and have found that the Kaldor-Verdoorn...