Randall Bolten Blog
January 05, 2016In an interview today National Public Radio reported on home construction data that the U.S. Commerce Department had been reporting erroneously for ten years. Not a sexy topic, but read on, since it addresses the whole subject of why we bother to collect data, and whether we need to spend more of our tax dollars in that effort.
December 28, 2015Dishonesty can take many forms. Many are easy to spot, or at least will get caught out by a little research – or by the increasingly large number of journalists and organizations focused on fact-checking. Other forms are subtler. My “favorite” with respect to numerical information is cherry-picking – using a few carefully selected facts to support or refute an argument. The facts cited are usually correct, and the presenter might be well-intentioned, but the approach is intellectually dishonest. Let's consider some examples...
December 21, 2015It’s ironic that two of the most popular forms of data visualization are named after delicious but fattening and unhealthy foods: the pie chart and its developmentally challenged sibling, the doughnut chart. To illustrate my point, let’s look at how we might present the distribution of scoring on the NBA’s current top team, the Golden State Warriors. We first see a pretty but non-nutritious doughnut chart, then consider some much better ways to look at that data.
December 15, 2015Last time we used a GRAPH to appreciate the long-term average performance of the U.S. stock market. It’s an important message for U.S. workers trying to save up for retirement. In this post, we look at equally important issue – the risk and uncertainty around that average, and this time it’s a TABLE that works best.
December 07, 2015A really good example of data visualization used properly is looking at the performance of the U.S. stock market over a very long period of time. Moreover, it’s an important subject that’s critical to almost everyone’s financial security. In this post, we look at an example of data visualization that can make an intimidating subject less terrifying.
November 23, 2015Like the Deadly Sins of Quantation listed in my book, “Painting with Numbers,” the art/science of designing incentive compensation plans has its own Deadly Sins. These Deadly Sins of Incentive Compensation render these very expensive plans useless or even destructive to the enterprise. I have a few of my own, but I’d love to hear your “favorites.”
November 19, 2015(I posted this blog exactly one year ago, and I post it again as a public service.) It’s that time of year again, when we have to figure out our best health insurance alternative in the face of wildly gyrating prices and complex competing plans. If you’re a finance professional, you’ll be doing your coworkers and your friends a huge favor if you can help them through this important and expensive decision. And data visualization plays a big part in this task.
November 10, 2015In an “Investment Writing” post, Susan Weiner observes that the frontrunner presidential candidates in both parties are the ones that speak the simplest English. We can assess the complexity of writing or speaking with metrics like the Flesch-Kincaid Grade Level score. Should we have similar metrics for our quantation?
October 28, 2015A Washington Post article, citing this year’s report on the National Assessment of Educational Progress (NAEP), reports that from 2013 to 2015, fourth-grade and eighth-grade math scores declined somewhat nationwide, and were stagnant or slightly down in reading. Are we really doing worse, or are we wasting our time with all this testing?
October 19, 2015A widely cited quote asserts that big data is like teenage sex, because there’s less of it going on than is widely believed, as well as lots of other misinformation about the practice. It’s an apt comment, and I have my own reasons for arguing that big data is like teenage sex.