A recent paper by Jesus Felipe and John McCombie argues that I have understated the importance of the value added identity for conventional estimates of production relationships. This reply seeks to clarify the areas of agreement and disagreement. It suggests that the problems raised by the...

Rigorous approaches to aggregation indicate that aggregate production functions do not exist except in unlikely special cases. This paper considers the awkward implications for growth economics. It provides a conventional defence of growth theory in terms of 'parables' and then considers how...