or taken part in this study, but who has been there for me, and is
giving me hope.

Now, a small anecdote. At a conference-sponsored dinner, a
scholar to whom my husband and I had just been introduced kindly
asked my husband if he, also, was a social scientist. When Paul
answered negatively, the scholar observed: "I understand; you are
just the victim of a social scientist." This witty remark reflects the
domestic reality hiding behind intensive academic work. Through
the years, Paul has given me a degree of support, help, and encour-
agement that I truly believe is uncommon. And he has never com-
plained about being frequently left behind. This book is also his
doing.

Finally, I want to say "I'm sorry" to Brian and Kevin, my
beautiful twin boys, for stealing much time from them that should
have been theirs, and for forgetting to smile, sometimes, when I
was too engaged or tired. To them, and to Paul, I dedicate this
book.

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