But everyone has a weak spot and this is theirs. How, I must ask, can one know what is "Successful" if one has not bothered to collect any data by which to make that evaluation? To their credit they spend the 2 pages between 295 and 297 talking about the biases that cause this absence of data. But disappointingly they spend a mere two paragraphs calling for improvement in this area and offer no suggestions on means to overcome anti-evaluation biases or methods by which data could be collected.
Their book was published in 1998 and over the past decade a few people in the field have started making more calls for greater M&E and produced methodologies towards that end, but I have yet to see one really rigorous evaluation performed.
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