Improve your writing with The Elements of Style – downloadable cheatsheet

I don’t know a better book on writing than the Elements of Style. It’s clear, it’s timeless, and best of all: it’s only 84 pages long. Nevertheless, I sometimes wish I could be reminded of the Elements as I write – flipping through the pages every time I write a blog post, report, or paper just isn’t practical. Hence my quest for a cheatsheet. For the uninitiated: a cheatsheet is a one or two-page set of notes for quick reference; they are typically used for technical topics such as programming.

I found a cheatsheet on the web but I felt that it could be improved. So I created my own: a two-page PDF [click to download] of the Elements of Style, clearly laid out in compact tables with examples. I plan to print a double-sided copy and laminate it for everyday use.

Disclaimer: having to compress the whole book into a two-page sheet meant I had to sacrifice some of the rules and finer points. I hope I have succeeded in leaving out only those parts that are either (too) obvious or no longer necessary in a world of auto-correcting text editors and pop-up dictionaries. I also moved some of the examples from the Words and Expressions Commonly Misused section to an earlier section. I take full responsibility for any remaining errors and poor judgement.

N.B.: if you like the cheatsheet, buy the book. You won’t regret it.

Pay day loans experiment

Loans with a typical APR exceeding 500% – surely that’s impossible? Or even if they do exist, no one in their right mind would sign up for these terms, right? Well, ask the people walking into one of these:

Pay day loan store shop front

Because of the risk involved in making pay day loans, the cost to the borrower of obtaining such ‘alternative finance’ is higher than regular credit. The problem is that pay day borrowers usually don’t have access to regular credit. As the Economist eloquently puts it: “For someone who is truly hard-up, the only thing worse than borrowing $200 at 600% APR may be not borrowing $200 at all.”

So pay day loans are expensive. But are they harmful, and should they be regulated? The arguments for and against pay day lending are familiar and well-rehearsed economic justice arguments:

  • AGAINST: “Offering pay day loans is taking advantage of vulnerable people.”
  • FOR: “But no one is forcing the borrowers – it’s their own choice.”
  • AGAINST: “But poor people make poor choices when tempted by shrewd lenders – somebody do something!”
  • FOR: “Who? The government? Who says they know what’s best for people?”

Obviously, this discussion is going nowhere – it’s unavoidably political. But don’t despair, there is a third way: the behavioural intervention. A behavioural intervention is Nudge speak for giving people better structured information so that they can make better choices. This is what a pair of economists from the University of Chicago investigated in a well designed field experiment. The researchers manipulated the print on the cash envelopes used in 77 branches of a US pay day lending firm over a two-week period. They tried three print versions as experimental treatments:

  1. A comparison of pay day loan APR to other forms of credit
  2. A list of the accumulated cost of pay day loans in dollars, compared to credit card borrowing fees
  3. Information on how quickly people repay pay day loans

Compared to a control group who receive non-manipulated, company branded envelopes, the second envelope manipulation reduced the likelihood of the recipient re-applying for a pay day loan in the next pay cycle by 11%. Furthermore, individuals in all three envelope treatments reduce their average borrowing over the next pay cycle by more than the control group.

So, assuming that at least some pay day borrowers would rather not use pay day loans to make ends meet, the behavioural intervention is a success. Whilst I’m not sure that the conclusion “information disclosure that is inspired by, and responds to, cognitive biases or limitations that surround the payday borrowing decision has a significant effect” is warranted (the treatment is actually less effective for those who spend the loan money on eating out and holidays), the reduction in loans across the whole sample is encouraging. Perhaps this is one for the Behavioural Insights Team?

Greed’s been good for us

I was skimming through a working paper on the role of behavioural biases in the Irish banking crisis, the objective of which is to inject some science into the explanations of a crisis that has often been said to result from ‘greed’ or ‘mania’. Now, the problem with greed and mania is that they are easy to recognise after the bubble has burst (of course the rise in house prices/bank profit growth was unsustainable), but not so much when the bubble is still growing. Without evidence from a parallel universe, empirical economists can only turn to historical data. Interestingly enough, the track record of greed is quite good (I’m not so sure about mania), said the late Milton Friedman:

Getting started with Stata 11 on Ubuntu Linux

I recently had to re-install Stata 11 for Unix after upgrading my operating system to Ubuntu 11.04 Natty. I followed Stata’s installation instructions and they worked fine. If you want Stata to ‘just work’, then I recommend installing the statically linked version instead of the dynamically linked version. But if you’re familiar with Linux package dependencies you might disagree, and check out the blog posts by Andrew Dyck and Jonas Ranstam for helpful post-installation instructions for the dynamically linked version.

Now, assuming you’ve got Stata installed properly, you will probably want to update your version and set and save your preferences. Because these tasks are not as easy as you would like, I’ve documented them here.

Updating Stata version

Why would you want to update your newly installed Stata software? Because it’s probably not the latest version, and therefore contains bugs. Stata 11.0 is rumoured to contain a bug that affects its calculations (I can’t actually find a online bug report for it at the moment) which means your statistics and therefore your conclusions could be way off the mark! So protect your academic credibility and enter:

update query

If the outcome is ‘all files up to date’ then you’re safe. If not, you want to type:

update all

and when that’s all done, restart Stata like this:

update swap

Setting your preferences

After you have applied the update, you can change your settings through the Preferences screen (I changed the default font to ‘DejaVu Sans Mono Book’ because the default font is awful). For some reason Stata wouldn’t save my preferences before the update, but the update to Stata 11.2 seems to have resolved this.

New evidence on the tech bubble

A new empirical paper on the dot-com bubble of the late nineties presents some serious challenges to the efficient market hypothesis. The authors report that 'institutions trade in the direction of clear mispricing in a small sample of equity carve-outs', the mispricing being a parent firm's share in a dot-com venture that exceeds the value of the parent firm (yes, that means that part of company A is worth more than company A altogether!). This should seriously worry anyone who believes that experts' use of arbitrage is a rationalising force in financial markets.

Furthermore, the paper takes some of the bubble blame away from individual investors by identifying big institutions (such as hedge funds) as the main drivers behind the bubble. This finding again (remember this guy?) contradicts the idea that the dot-com bubble was fuelled by personal investors, which seems like a textbook case of mistaking correlation for causality.

Digital magic and stupidity

I'm currently at the 2011 ICABEEP/SABE Conference in Exeter to see what's happening in the fields of experimental psychology and behavioural economics. Presentations as well as the weather (in the UK, nonetheless!) have been good so far. One of the keynote speakers, Russell Belk, gave a very inspiring talk on the digital consumer this afternoon. He described the lifecycle of a digital innovation as a transition from something new and magical to a common good. When it's at the magical stage, a well-marketed innovation becomes the subject of a furious discussion between various ideological perspectives. These ideologies, which in one of the talk's reference papers are categorised as technotopian, work machine, green luddite and techspressive, give rise to stories of both utopian ("social media made the 'Arab spring' possible") and dystopian ("excessive use of the web leads to social isolation") ilk.

As with any good talk on innovation, the speaker notes many similarities between people's response to new digital technology and previous generations' response to innovations of their time. He highlights Plato's description of a dialogue between Phaedrus and Socrates, in which Socrates criticises the practice of writing things down as a memory aid, arguing that when wisdom is contained in books, people will be dumber for it. This, of course, sounds a lot like the idea that Google is making us stupid. Well, perhaps Socrates would be delighted to hear that schools in Indiana have finally taken his advice on board and have stopped teaching cursive handwriting.