This is a limited free preview of this book. Please buy full access.
Because of the elapsed time from the beginning of the project until the data analysis was initiated (facilitated by a third colleague with expertise in data analysis joining us in 1999), the original literature review had to be updated by the substantial corpus of studies completed in the intervening decade. These various delays were overcome partly by the conviction that we had at our disposal a unique data set which was not compromised by the elapsed time since it was collected.