Summary and reading note of the paper Yongmin Chen, Chuan He, Paid Placement: Advertising and Search on the Internet, The Economic Journal, Volume 121, Issue 556, November 2011, Pages F309–F328, https://doi.org/10.1111/j.1468-0297.2011.02466.x Yongmin Chen and Chuan He are both Professors at the University of Colorado Boulder. This is a theoretical paper. The paper examines the effects of online advertising with paid placement on sellers and consumers. It formulates a market model with multiple differentiated sellers and searching consumers, with the search engine serving as an information intermediary....

Here is a summary of the paper “Digital Advertising and Market Structure: Implications for Privacy Regulation” by Deisenroth et al., along with some of my thoughts on its interesting aspects. This economics paper focuses on industrial organization and public policy. The five authors are Utsav Manjeer, Daniel Deisenroth, and Zarak Sohail from Meta; Steve Tadelis, a professor at UC Berkeley and affiliated with NBER and CEPR; and Nils Wernerfelt from the Kellogg School of Management at Northwestern University....

Here’s Susan Athey’s remarkably refreshing ideas on economists’ career in industry: (Stanford GSB wrote in the introduction of the YouTube video) “Economists are finding purpose outside of academia as their perspective becomes more valuable to technology companies… Susan Athey explains how economists offer new ways of mapping business objectives to metrics, incentives, and success.” Very refreshing pov: One of the things that’s been really interesting about the tech companies of the last 15 to 20 years is that, they’ve not only been innovating in terms of their technology, but also in terms of their business models....

The Berliner Philharmonic has been messing with cool marketing campaigns these days. Here’s one interview featuring Emmanuel Pahud, the principal flute: The flute to me is just the extension of my breath. I determine the length with the fingering I’m playing. But actually I’m a singer. It’s an open instrument, there’s no resistance from the instrument itself unlike any other woodwind instrument or brass instrument. And it creates an open sound, that is truly the extension of my breath, and the projection , the resonance is something that you create in your own body....

For the suppose-to-be-continuous series of online algorithm’s seminar course note (see a pervious note here), here’s a latest one. Today’s theme is introduction to online learning. the so-called “expert setting” There is a decision maker who makes decisions over time horizon $t = 1, 2, \ldots, T$. We expect $T\to \infty$ to be asymptotic in our analysis. There is a set of “actions” — $\lbrace L, H\rbrace$ (assume two for now)....

The Easiest Solution: Follow along when everyone else starts clapping. This rule works surprisingly well! In any audience, there are usually seasoned aficionados who know the piece well enough to clap at just the right moments. Following their lead generally does the trick. By Genre: Concert In classical concerts, it’s customary not to clap between movements of a single piece—especially in large, serious works like symphonies, concertos, or sonatas. These pieces are designed to flow uninterrupted, creating a cohesive experience for the listener....

A small piece for midnight metropolitan, messed with rain and blurred neons.

The famous Abbado-Agerich 1974 recording includes one Prokofiev and two Ravels. All three are splendid piano works. Argerich performed Ravel Piano Concerto in G at Nobel Prize Concert 2009: “a snippet of the concerto that shows a lot of an incredible ability to create dialogue, with herself on the piano, if not with the orchestra” (YouTube comment)

“This piece was recorded between 1930 and 1935 and this isn’t a scamm, it really is Prokofiev who is playing the piano!!”

Mariinsky Ballet at Shanghai, Oct. 23 2024. Ballet Gala. Don Quixote Act II pas de deux. One nice thing about ballet is that you can cheer and applause during the performance—so it’s worthwhile to watch it live (even from the third floor)—to be among the audience and enjoy the awe. The ballerina wasn’t technically 100% perfect—you can observe a tiny trip at 11s. Yet the audience was ignited and she got thundering applause....