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Fischer Black was
somewhat of an enigma in life, and so he remains in this biography. We know him
as the co-author of the famous Black-Scholes option pricing formula. Biographer
Perry Mehrling fleshes out that perception, but he focuses more on Black's
research interests than he does on Black the man. In this regard, the book is
very similar to Bernstein's (1993)
Capital Ideas. It magnificently describes researchers and their ideas,
tying them together into a unifying narrative. Bernstein is a more expansive
book. It covers Black-Scholes theory, but in less detail. I have never read as
detailed and enlightening account of the origins of the Black-Scholes formula as
the one presented here. Most financial engineering students are unaware that
Black-Scholes and CAPM are consistent theories. Not only that, but Black
actually derived the Black-Scholes formula from CAPM! Mehrling's treatment of
this material is masterful.
Unlike Bernstein,
Mehrling does occasionally break down and resort to a formula or two to help the
narrative along. I think this is appropriate. The formulas do help, and most
readers of this book will be people with some technical expertise.
Of Black the man,
we learn the essentials: schools, employers, wives and children. There are some
anecdotes and hints of a human side. We learn of his marital troubles and his
untimely death due to cancer. For the human struggles these entailed, we mostly
have to rely to our imagination.
A considerable
portion of the book is devoted to Black's economics research, which mainstream economists
never embraced. Mehrling is himself an economist, and he is clearly interested
in communicating Black's ideas. This material is presented with the same style
and flair as the earlier material on the origins of the Black-Scholes formula,
but it is less interesting.
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Prologue: the Price of Risk
1. Thou Living Ray of Intellectual Fire
2. An Idea in the rough 3. Some Kind of
an Education 4. Living up to the Model
5. Tortuous Economic Intuition 6. The
Money Wars 7. Global Reach
8. Stagflation 9. Changing Fields
10. What Do Traders Do? 11. Exploring
General Equilibrium Epilogue: Nothing is
Constant. |
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Why did
Black fail at economics? Politics certainly played a role. Black did not have a
Ph.D. in economics. He was a practitioner who made his way into academia by
virtue of his work on option pricing theory. His economics theories were
external to the monetarist debates of the day. Maybe his ideas simply lacked
merit. The reader is never in a position to decide, and as the book goes on and
on explaining Black's views, most readers will stop caring.
Mehrling's
description of Black's days at Goldman Sachs is disappointing. We learn nothing
about what it was like to work at Goldman Sachs—the culture, the personalities,
the familiar Wall Street greed. Mehrling seems out of his depth describing
happenings at a major trading house. He hardly even tries, focusing instead on
explaining Black's ideas during the period. The explanations are not as detailed
or insightful as the earlier explanations relating to the Black-Scholes formula
or Black's economics writings.
This book has
strengths and weaknesses. The real strength is its treatment of the origins of
the Black-Scholes formula. It will keep your attention, but I
did catch myself skimming some sections towards the end. If you read biographies
to understand people, you will be disappointed. The book is about economic
ideas. I think Black would have been pleased.
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