'… one cannot help but be impressed with what these authors have achieved, and this book is clearly a landmark in the literature'. Economica
'The strength of this book is its thoroughness, and it will be a very useful reference book for this reason'. Journal of Social Policy
'… here we have all that is best in empirical economics and applied statistics … described with great authority and clarity. All in all this is an excellent book in every regard.' Income and Wealth