Last year, the Washington Nationals finished 12th in baseball in stolen bases. This year, they’re 1st. What’s changed? In a word: Davey.
If we look at all managers coaching the same teams in 2023 and 2024, we find that Martinez has changed his approach the most, with his club more than twice as likely to attempt steals of second base. Changes in personnel are surely a factor, but it’s nevertheless remarkable to see an MLB manager change his approach so significantly on a year-over-year basis.
Home Prices Remain High Despite Elevated Mortgage Rates, Creating an Affordability Crisis for Homebuyers
While not the primary focus of this website, the US housing market is nevertheless a notable interest of mine and something that I will post updates on from time to time.
Last summer, I wrote a piece hypothesizing that the large share of current mortgages being held with now-unattainably low rates would interact with the still-expensive price of homes to limit liquidity in the housing market by 1) “trapping” current homeowners in their current mortgages (“golden handcuffs”), reducing supply and 2) suppressing demand from buyers who cannot afford to buy homes which remain expensive, but have much higher borrowing costs.
Making Large CSVs Queryable via REST: A Case Study Using DBHub.io to Create a Serverless API for Aircraft Data
A few weeks ago, I posted some work-in-progress code that I’ve been putting together to identify planes flying overhead. One thing that I’ve really wanted to include in that data output, but which is not natively returned by the OpenSky States API, is the model of the plane flying overhead.
This post shows the unorthodox way that I’ve managed to make model information programmatically available, so that we can quickly query for any given plane callsign and retrieve its typecode.
What do NFL Players Really Think About Their Teams? Visualizing NFLPA Team Report Cards for the 2023-2024 Season
This morning, the NFL Players Association (NFLPA) released their latest set of Team Report cards, following last year’s inaugural data. These report cards include grades by 1,706 players, scoring their own teams on a variety of player experience dimensions from A+ to F-.
This year, we saw Head Coach and Owner grades added on top of the eight areas from last year:
Treatment of Families Food/Cafeteria Nutritionist/Dietician Locker Room Training Room Training Staff Weight Room Strength Coaches Team Travel When this data came out last year, I found the presentation a bit lacking - the NFLPA just dumped the data into an ugly, unwieldy table!
Examining the More-than-Meets-the-Eye Relationship Between Exit Velocity and WAR for MLB Hitters
Looking at Statcast’s leaderboard of the hardest-hitting players in baseball makes it all seem so easy: simply acquire the guys who smash the ball the hardest, and then profit!
It looks almost foolproof - only Kyle Schwarber and Giancarlo Stanton put up below-average WAR figures from this group of 15 hitters, and most of the obvious best hitters in the league (Judge, Acuña, Ohtani, Seager, Alvarez, Soto) are prominently featured:
Identifying Planes Flying Overhead with Python and the OpenSky REST API
One of the many things I enjoy about living in Santa Monica is that it sits directly underneath the Western/Northern approach to LAX. Every 4 minutes, or so, a plane will fly directly overhead, having come across from Malibu, before continuing inland towards Downtown Los Angeles. There, it will execute a big sweeping turn that aligns it with the incoming traffic from the east, which it will zipper into for the final descent westward towards the sea.
Studying the NBA's Surge in High Scoring Individual Games
The past month of NBA basketball has been marked by a staggering amount of individual offensive brilliance, with Luka Doncic and Joel Embiid both going for 70 points, and Karl-Anthony Towns, Devin Booker, and Steph Curry all hitting the 60 point mark.
Prompted by this unique explosion of point scoring, I wanted to take a quick look at the history of high-scoring individual games, show how the recent events are really just the exclamation point on top of a long-term trend, and demonstrate how changes in the league’s offensive landscape have created a landscape more conducive to these outbursts.
How to Make $700M Palatable: Exploring Shohei Ohtani's Uniquely Deferred Megadeal with the Los Angeles Dodgers
Earlier today, ESPN reported some bombshell news about Shohei Ohtani’s new contract: it’s heavily backloaded.
So heavily so that Ohtani will only take $2M of salary each of the next ten years, with the remaining $680M (over 97% of the value) paid out between 2034 and 2043.
Time Value of Money and Net Present Value (NPV) The heavily deferred nature of contract piqued my curiosity for what the deal should realistically be valued at today.
Entering the European Space Agency's 'Little Pictures of Climate' Competition (2023)
Litte Pictures Competition Earlier this fall, I stumbled across a fun data visualization competition called the “Little Picture” competition, advertised with this delightful call to action:
help us transform decades of satellite climate data to compelling, impactful “Little Pictures” that spark awareness and drive action
As you might guess, I couldn’t resist putting a submission! Now - I am not sure I am technically even eligible to submit an entry to the competition, as the eligibility guidelines seems to target citizens of European Union (EU) member states and European Space Agency (ESA) contributors.
Fixing Horrendous Charts: Electric Vehicle Preference Trends
Earlier this week, I came across an analysis with some interesting data and takeaways, but one of the worst data visualizations I’ve seen in a long, long time.
After some very careful study, I was able to make out that openness to purchasing an electric vehicle (EV) or hybrid surged in 2021, but has stagnated in 2022 and 2023. However, the chart is so unintuitive that it’s hard to quickly come to that conclusion - I can’t actually believe a big company like S&P Global Mobility would publish something like this!