This 4th edition book was recommended on a reading list for an economics related course and I duly bought it. Big mistake! There are numerous errors; decimal points omitted, plus signs where there should be minus signs and x's where there should be y's. Some of these mistakes are more obvious than others. In one example that I noticed 'in' has been left out from the word inefficient and the sentence has a completely different meaning.

Imagine my surprise when I checked a third editon copy and found it free from these mistakes. I wish I'd just bought a second-hand copy of the 3rd edtion. All in all it is a very poorly edited text. Lecturers out there - please do not recomend this edition to your studies so that hours of confusion can prevented!