Comments for Computational Legal Studies™

Comment on New Paper Available on SSRN: A Profitable Trading and Risk Management Strategy Despite Transaction Cost by mjbommar

mjbommar — Wed, 17 Mar 2010 14:49:42 +0000

Hi Michael,
That’s always a fair question. I don’t imagine this strategy will be executed with enough magnitude to overcome other behavioral or algorithmic dynamics in the S&P500. The answer still depends on what you believe algorithmic trading’s effects on the market is and other more broad beliefs about Lucasian critiques.

As far as predicting its performance in the future, we have performed a number of simulations that “generalize” our results to other time periods that are not too dramatically unlike our training sample. Note that the method does outperform the market even through the recent equity declines in 2008 and 2009. However, there’s never a guarantee that even the best out-of-sample backtesting can prepare you for what the future might hold.

Comment on New Paper Available on SSRN: A Profitable Trading and Risk Management Strategy Despite Transaction Cost by Michael Metcalf Bishop

Michael Metcalf Bishop — Wed, 17 Mar 2010 14:34:15 +0000

Do you think the strategy will stay profitable now that your result is being publicized? You should make some predictions about how it will fair in the future.

Comment on Programming Dynamic Models in Python-Part 3: Outbreak on a Network by mjbommar

mjbommar — Thu, 25 Feb 2010 01:48:35 +0000

Hi Pete,
You’ll need to install pycairo on Windows. Googling for pycairo and your particular version of Python should do the trick.

Comment on Programming Dynamic Models in Python-Part 3: Outbreak on a Network by Pete

Pete — Thu, 25 Feb 2010 00:16:33 +0000

Hello,

I tried to run your code, but got the error below. Any ideas?

Thanks,

Pete

Traceback (most recent call last):
File “C:/Python26/networktest”, line 245, in
myNetworkModel.graphPlot()
File “C:/Python26/networktest”, line 222, in graphPlot
igraph.drawing.plot(self.graph, layout = l)
File “C:\Python26\lib\site-packages\igraph\drawing.py”, line 738, in plot
result = Plot(target, bbox)
File “C:\Python26\lib\site-packages\igraph\drawing.py”, line 222, in __init__
self._surface_was_created=not isinstance(target, cairo.Surface)
File “C:\Python26\lib\site-packages\igraph\drawing.py”, line 51, in __getattr__
raise TypeError, “plotting not available”
TypeError: plotting not available

Comment on Bankruptcy and Foreclosure InfoGraphic [Via Total Bankruptcy] by sudarsan

sudarsan — Sat, 20 Feb 2010 10:41:20 +0000

Mortgage companies are willing to work with debtors since some people would rather afford them others freedom instead of go through any trouble with court proceedings involved with foreclosures.

Comment on Large Scale ( 130,000 + ) Zoomable Visualization of a Twitter Network by mjbommar

mjbommar — Thu, 28 Jan 2010 21:19:19 +0000

Hello Pascual,
The calculation was done with a modified version of igraph. A couple hundred iterations run in just over a day on a new i7.

Comment on Large Scale ( 130,000 + ) Zoomable Visualization of a Twitter Network by psj

psj — Thu, 28 Jan 2010 21:15:04 +0000

Generating a FR layout for 130365 nodes must have taken quite some time. What software did you use (igraph?), and on what hardware did it run?

Comment on Sean Gourley on the Mathematics of War by Barry Edwards

Barry Edwards — Wed, 20 Jan 2010 04:44:41 +0000

Interesting video with great graphics. I’m not sure I follow or agree with his inferences about the organization of insurgent groups in Iraq. Keep up the good work on your blog!

Comment on Cash for Clunkers Average Net Fuel Miles By State by Jonathon Hill

Jonathon Hill — Sun, 17 Jan 2010 06:02:11 +0000

Does this mean that the brighter areas are less fuel efficient overall? If so, I am surprised that the west coast is so bright!

Comment on Educational Attainment and Employment Infographic [Via US College Search.org] by Jared

Jared — Sat, 09 Jan 2010 16:21:38 +0000

They’ve done a nice job obscuring the information with those fat arrows. Their “slope” seems to be meaningless (note that unemployment isn’t even strictly increasing with decreasing educational attainment – see doctoral vs professional). Why not just connect the dots, so to speak? A pretty nice idea very poorly executed.