A few months ago, I spent a week in Paris with my mom and sister, visiting museums and exploring the city. One of the more exciting things we stumbled upon was the 2024 Summer Olympics countdown timer in the Place de la Concorde, which signaled 7 months until opening ceremonies - pretty cool to see!

As we read about the government’s plans to host events throughout the city, we discovered that they intend to use the Seine to host swimming events - a proposal our group found to be completely laughable. If you’ve seen the river in person, you’ll know exactly what I mean - it’s wide, full of current, and notorious for being the final landing place for the city’s sewer runoff - so it’s no surprise that swimming has been illegal since 1923.

Read More

Last February, I began writing an app for my Tidbyt smart display. This April, at long last, I finally published it!

If you recall my initial post on the topic, I had planned to create a flight arrivals/departures board for my home airport, LAX. However, difficulties with metered API access (most data sources had low daily API caps of 50-200 uses) and schedule caching pushed me towards a “simpler” question to solve - can I identify planes flying overhead?

Read More

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. I certainly thought it was a noticeable (and notable!) trend to open the season - wanted to write a quick post here to share!

Read More

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.

Read More

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. Let’s talk it through!

Read More

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! As such, I found it an easy and valuable exercise to build two sets of artifacts to better communicate the report cards: first, a league-wide heatmap of grades, and second, division-by-division circumplex charts. Feel free to take a peek at that post to see the data and how I put those charts together.

Read More

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:

Read More

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.

Read More

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.

Read More

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. We all know that a bird in hand can be worth two in the bush - the longer the time horizon for a nominal sum to be paid back, the less valuable it is to hold that sum today.

Read More