To mark the retirement of Robert S. McNamara as President of the World Bank after thirteen years of service, the Bank's Executive Directors commissioned a book gathering together all the principal statements Mr. McNamara made during his tenure of office

"In recent debates, trade preference erosion has been viewed by some as damaging to developing countries, and by others as insignificant, except in a few cases. But little data have been available to back either view. The objective of this paper is to improve our measures of the size,...