In this short note I clarify two features of Figure 2.3 in Barro and Sala-i-Martin [2004]. The figure, as it appeared in the first and second editions of the book, is confusing if not wrong. I hope this note will serve as a corrigendum to the figure

I add intangible capital to a variant of the neoclassical growth model and study the implications for cross-country income differences. I calibrate the parameters associated with intangible capital by using new estimates of investment in intangibles by Corrado et al. (2006). When intangible...