The NY Times has an interesting story about fashion: Why Do So Many People Wear All Black? Link. Vanessa Friedman (2024). The discussion begins with a mentioning of a middle school in Texas banning students to wear top-to-bottom black, because the color was more associated with “depression and mental health issues and/or criminality than with happy and healthy kids ready to learn.” The decision [banning all-black attires], not surprisingly, produced such an outcry that it was quickly put on hold to allow for community discussion. And while it does seem somewhat extreme and not entirely realistic, reflecting a very limited understanding of black clothing’s role in the public psyche, it also demonstrates the very real power of wearing all black. More than any other color, it is replete with associations and symbolism, which may mean one thing to a wearer and another to an observer — and which changes depending on the context. ...

Not time to look thoroughly into Google’s issue yet. However, one of Google’s main arguments: With the cost of ads going down and the number of ads sold going up, the market is working. The DOJ’s case risks inefficiencies and higher prices — the last thing that America’s economy or our small businesses need right now. Sounds more like a threat than a proper defense. To me it’s less compelling than DOJ’s 170-page complaints. But I do believe that Google has put forward irreplaceable technologies to have significantly advanced the ad tech industry. But one might live a double life, isn’t it. ...

Here’s your Sunday cuppa tea, or wine if you’d need for today’s juicy content: what has Google done wrong, for real? Today let’s drink the richest blend—how they manipulated their auction mechanism to secure monopoly—according to the DOJ’s filed complaint. Related blogs about DOJ vs. Google: DOJ’s complaints overview, and break down Part I and Part II. before we begin, here’s a quick recap: A quick look at the complete market: The ‘ad-tech stack’, from the left (publishers) selling to the left (advertisers) ...

Music for the weekend: Mozart’s Flute Concerto No. 2 in D major, K. 314. A bit of history lesson: Dutch flautist Ferdinand Dejean (1731–1797) commissioned Mozart for four flute quartets and three flute concerti, of which Mozart only completed three quartets and one new flute concerto (K.313 in G major). Instead of creating a new second concerto, Mozart rearranged the oboe concerto he had written a year earlier as the second flute concerto, although with substantial changes for it to fit with what the composer deemed flute-like. However, Dejean did not pay Mozart for this concerto because it was based on the oboe concerto. ...

I first heard an economist talking about this fascinating concept at Al’s market design coffee. These days I found a student in my coauthor’s former PhD advisor’s group has Erdős number 3—and he’s a first-year PhD. orz. The Erdős number describes the “collaborative distance” between mathematician Paul Erdős and another person, as measured by authorship of mathematical papers. How it has started: Paul Erdős (1913–1996) was an influential Hungarian mathematician who in the latter part of his life spent a great deal of time writing papers with a large number of colleagues—over 500—working on solutions to outstanding mathematical problems. ...

Following up on last week’s introduction to combinatorial auctions and Vickrey-Clarke-Groves (VCG) mechanisms, a natural question arises: Is there a more efficient algorithm to allocate items effectively? One general idea is to start with an arbitrary price vector. If an item is demanded by more than one agent, we increase its price; if no agent demands it, we decrease its price. We then sit back, and pray that the process terminates: ...

Google’s Playbook — Locking Down the Ad Tech Market Continuing from our previous discussion, Google’s ad tech dominance didn’t just materialize overnight. It’s been meticulously crafted through a series of calculated moves that have systematically cornered the ad tech market and stifled competition. Let’s delve into some pivotal tactics outlined in the DOJ’s complaint under Part IV. of DOJ’s complaint GOOGLE’S SCHEME TO DOMINATE THE AD TECH STACK: Sorry, there we go: ...

The DOJ’s complaint against Google is remarkably clear, efficiently addressing the core issue of Google’s monopoly in display advertising within 150 pages. After reading it, well, I believe Google is in serious trouble this time. The DOJ made its point effectively, outlining the ad tech ecosystem’s structure by highlighting key abstractions and omitting unnecessary details. They’ve probably created some of the best explanatory slides ever. The complaint is available here in DOJ’s official website. Their slides is also released—succinct and straight to the point. ...

Week one of DOJ v Google ongoing. Despite the heat in the courtroom, let’s look back a little: here’s a recap of the Department of Justice (DOJ)’s arguments against the Google’s alleged ad market monopoly. Justice Department Sues Google for Monopolizing Digital Advertising Technologies PRESS RELEASE of DOJ. Tuesday, January 24, 2023 The lawsuit is focused on Google’s display advertisement business—the two-sided market of advertisers, publishers and intermediate service providers. ...

Happy fall—and the start of the new school year. Listen to autumn from Vivaldi’s four seasons: I feel like summer everywhere is almost the same as in both vibes and time definitions: like, it’s just suppose to be hot and fun holidays. But autumn is defined differently across various cultural, astronomical, and meteorological contexts. In the astronomical context, autumn is defined by the position of the Earth relative to the sun—when day and night are approximately equal in length, marks the start of autumn. (Sept. 22nd). ...