Math-frolic Interview #2 is already here...
[#1 was HERE if you missed it.]
As much as I enjoy math blogs, something I may like even more-so are blogs that cut across different fields with math-related content. One of my favorite blogs in that regard is Presh Talwalkar's "Mind Your Decisions" which includes content on economics, personal finance, game theory, psychology, and simple practical tips, along with mathematics and puzzles. It's somewhat unpredictable what he may be covering or presenting on any given day!
Presh was kind enough to assent to an interview:
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1) ME: To start, tell readers a little about your background
or anything else pertinent to your blogging:
PRESH: I have always loved math, and I loved my time as an undergraduate at
Stanford where I double-majored in Economics and Math.
I also learned about money and investing at a relatively young age.
My high school had an investment club where we researched stocks and
actually got to invest real money. So before I even had a full-time
job, I understood the basics of diversification and long-term
investing.
2) ME: Your blog, cuts across several interesting categories, math,
economics, psychology, etc. ("game theory and personal finance" is
its sub-heading)… how would you yourself classify your blog, or do
you even think of it in a category? And how do you select the topics
for each post?
PRESH: True, my blog does not fit into a simple category. Over the years, I
have, however, come up with a type of format to my posts, as
follows:
Monday = math puzzle, Tuesday = game theory, Wednesday =
saving/money, Thursday = smart decisions/decision theory, Friday =
math-related/anything fun/book review
A lot of people ask me how I get ideas. To be honest, this is rarely
an issue for me. I read a lot of books and am generally an observant
person. So I never have a lack of topics to write about.
That said, I still do get writer's block just like anyone else.
There's a big difference between having a topic and being able to
write a blog post, as I'm sure any blogger can relate.
3) ME: You call yourself a "math nerd at heart"… How did your interest
in mathematics originally come about, and what are your favorite
aspects of mathematics to study or read about?
PRESH: I remember loving math even in elementary school. There was
something amazing about numbers and being able to solve problems.
In high school, my favorite area of math was calculus. It
incorporated everything I had learned about math, and suddenly the
world made sense and looked completely different.
In college, I particularly enjoyed Analysis--which is why I took
real analysis, complex analysis, and analysis on manifolds. I also
took as much Linear Algebra as I could. I also write a lot about
probability on my blog, as that's most relevant for game theory.
4) ME: How did the idea for your blog first come to you, and and how
confident were you that there would be an audience for it?
PRESH: I got the idea for blogging after getting sick of reading personal
finance books. Many of the authors use shady math and don't teach
ideas but rules. I wanted to show a sensible approach, relying on
the authority of math.
I had a feeling there would be an audience based on my friends.
There were a lot of doctors, engineers, and otherwise technical
people who couldn't stand the platitudes and simplicities of most
financial pundits. Of course, it's always easy to be confident in
hindsight.
5) ME: You frequently employ math "puzzles" for blog posts (and even
have an e-book of such puzzles available), and I often find the
puzzles you use new to me, or at least given a fresh presentation.
How do you go about finding puzzle material for your blog?
PRESH: Thanks. I have read a lot of puzzle books and I am constantly
reading about math. I like problems that have some historical
importance, which are oddly omitted in many math textbooks.
I also try to use math in my daily life, and that's where some of my
favorite puzzles are derived. Just recently I was eating a 3-course
meal and wondered "in how many ways can I eat this meal?" That
became a puzzle.
6) ME: Approximately how much time per week do you spend working on your
blog? And is it principally "a labor of love" or is it much more
than that for you?
PRESH: I have never completely accounted for the time I spend on the blog.
It usually takes an hour to write each post, but that's after I've
done all the research. And of course, many of my ideas come from
reading, which I spend about 2 hours a day doing.
The blog is definitely a "labor of love." While I do make some money
from advertising and ebook sales, I have resisted many chances to
sell out the blog with paid guest posts and text links. On the one
hand it would be nice to get extra cash. On the other hand, why
would I sell out my reader's for a quick buck?
I think about this blog as a reflection of who I am and a way to
reach interesting people with similar philosophies.
7) ME: Are there certain blogposts you've done that stand out for you as
personal favorites or ones that were the most fun to work on? And
from the other side, which posts seem to have been most popular or
attention-getting from your readers?
PRESH: There is one thing I have done that is by far the most rewarding. I
use a spreadsheet to track my expenses. It's a simple spreadsheet
that uses a couple of "array formulas" to tabulate total spending
and category spending. This simple spreadsheet--that can be
downloaded free "http://mindyourdecisions.com/blog/financial-tools/">here
--has
gotten over 37,000 downloads and tons of people email me thanking me
for making it available.
Perhaps my all-time favorite post is "http://mindyourdecisions.com/blog/2008/08/19/game-theory-in-the-dark-knight-a-critical-review-of-the-opening-scene-spoilers/">Game
theory in the Dark Knight. It came as a novel observation
that the Joker's bank robbery resembled a math puzzle called the
pirate's game. Due to the success of the Dark Knight, this is also
the most popular post, bringing in a lot of link-love and traffic.
Another fun article was "http://mindyourdecisions.com/blog/2007/08/16/what-is-the-difference-between-apy-and-apr-how-is-interest-actually-computed-in-my-savings-account-or-on-my-loan/">What's
the difference between APR and APY?. I had seen
explanations at other websites and did not find them completely
convincing, so I took some time to explain the math myself.
8) ME: Your blog is about helping people learn the skills to make good
decisions for themselves. What books would you especially recommend
to lay people for understanding or improving their decision-making
skills?
PRESH: My favorite personal finance book is Die Broke. As the title indicates, the book's philosophy is
about using your income smartly and not leaving a large estate.
An excellent introduction to game theory for the lay person is Thinking Strategically. It's a lively introduction to strategic
thinking and one of the books that got me really excited about game
theory.
I also recommend The Black Swan by Nassim Taleb, which has become something of a
modern classic. The book made me think about risk in terms of
high-impact decisions and avoiding catastrophe. It also is a book
that pokes fun at academic finance, which is amusing on its own.
9) ME: From your experience at blogging successfully, do you have any
words of advice you would offer to other bloggers or math
communicators?
PRESH: One thing I've learned from blogging is that it's not good enough to
write about things I find interesting. There are celebrities that
get away with that because people are naturally interested in them.
But for me, a good post is one that delivers something interesting
to my readers, which requires doing more research to link to
relevant resources.
10) ME: Any parting words, not covered above, you'd want to pass along
to a math-oriented audience?
PRESH: I will end by explaining the meaning of the name of my blog! The
name has two interpretations: I try to use my mind for my decisions,
and I will only mind my decisions--even if that means standing out.
I think this is a philosophy that should resonate with anyone that
does math.
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-- Great to hear from you Presh, and I definitely encourage folks to check out http://mindyourdecisions.com/blog/ if you've never visited it before.
[The purpose of Math-frolic Interviews is to assist building community among some of the many math communicators and enthusiasts around the Web, so that we get to know each other better. If you're willing to be interviewed, or wish to recommend someone for an interview, let me know...]
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