 Paul Romer criticises that while the data and empirical analysis is presented with admirable clarity and precision, the theory is presented in less detail.In his opinion the work was written with the attitude "Empirical work is science; theory is entertainment" and therefore an example for Mathiness.Lawrence Blume and Steven Durlauf criticized the book in the "Journal of Political Economy" for being "unpersuasive when it turns from description to analysis...