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A list of all the posts and pages found on the site. For you robots out there is an XML version available for digesting as well.

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About me

This is a page not in th emain menu

** Published:**

I have just signed the Great Barrington Declaration.

** Published:**

Recently, my working paper Susceptible-Infected-Recovered (SIR) Dynamics of COVID-19 and Economic Impact has surpassed my JEBO paper in terms of citation counts, and has become my most cited paper. My COVID-19 paper is one of the very first written by an economist on this topic, and it appeared in the first issue of the working paper series Covid Economics. Although I am no longer working on this paper since the situation with COVID-19 has been changing too quickly (especially when I wrote the paper in March 2020) to keep up with, I am glad that this paper has made some impact. In fact, it was featured in VoxEU and Fortune articles.

** Published:**

As a long-time California resident, I am very well aware of all those government red tapes. But the recent move of the city of Berkeley to ban placing junk food and beverages at checkout ailes is completely nonsense.

`$$...`

, `\[...`

, and `\begin{equation*}...`

** Published:**

I have been using \(\LaTeX\) for over 20 years now. When I write a displayed equation without numbering on a single line, I have been using `$$...$$`

because it was simple. I didn’t understand why some people use `\[...\]`

, because the latter takes more time to type and is not necessarily easy to read. Today I read this article and learned that `$$...$$`

is incorrect. From now on, I will switch to `\begin{equation*}...\end{equation*}`

because it is easy to read and we can add equation numbering by deleting `*`

if we change our mind.

** Published:**

I have recently read the article “Why Mathematicians Should Stop Naming Things After Each Other”. The same logic seems to apply to economics.

** Published:**

Let \(A, B\) be square (complex) matrices such that \(|B| \le A\). Then it is well known that \(\rho(B) \le \rho(|B|) \le \rho(A)\), where \(\rho\) denotes the spectral radius (largest absolute value of all eigenvalues). See, for example, Theorem 8.4.5 of Horn and Johnson (2013). In my recent paper, we needed to use the spectral abscissa (largest real part of all eigenvalues) instead of the spectral radius. By analogy, we can make the following conjecture: if \(A, B\) are square complex matrices such that \(\mathrm{Re} b_{nn} \le a_{nn}\) for all \(n\) and \(|b_{nn’}| \le a_{nn’}\) for all \(n \neq n’\), then is it true that \(\zeta(B) \le \zeta(A)\), where \(\zeta\) denotes the spectral abscissa?

** Published:**

There is a restaurant called “The Bistro” on UCSD campus. Although I don’t like this restaurant because it’s basically a fusion American Asian place, sometimes I have to eat there when we take seminar speakers for lunch. Once I ordered some fried cod (neither quite fish and chips nor tempura). On the menu it said the dish comes with brown rice, so I asked the server to substitute white rice for brown rice. (Most Japanese people eat white rice - only those with strong opinions eat brown rice, though obviously the latter is healthier.) When the dish arrived, I was stunned that the rice, though white, was sushi rice (i.e., vinegared rice). I asked the server to bring proper white rice but she didn’t know the difference. Since then, whenever I organize the seminar lunch, I choose a different place.

** Published:**

I have created a new website. I have been using Google Sites to create my old website. I like the classic Google Sites because it allows the user to take control of the structure by programming in html. However, the new Google Sites no longer have this feature, and since the classic Google Sites will be discontinued in 2021, I had to do something else. After a bit of Google search, I found this template, which is exactly what I wanted (ability to take full control, free, no advertisements, etc.).

** Published:**

Advices on applying to economics Ph.D. programs

** Published:**

List of my coauthors

** Published:**

Email writing tips for undergraduate students

** Published:**

Resources on LaTeX

** Published:**

My policy for writing letters of recommendation

** Published:**

Places that I have visited

** Published:**

Short description of portfolio item number 1

** Published:**

Short description of portfolio item number 2

Published in *Journal 1*, 2009

This paper is about the number 1. The number 2 is left for future work.

Recommended citation: Your Name, You. (2009). "Paper Title Number 1." *Journal 1*. 1(1). __http://academicpages.github.io/files/paper1.pdf__

Published in *Journal 1*, 2010

This paper is about the number 2. The number 3 is left for future work.

Recommended citation: Your Name, You. (2010). "Paper Title Number 2." *Journal 1*. 1(2). __http://academicpages.github.io/files/paper2.pdf__

Published in *Journal 1*, 2015

This paper is about the number 3. The number 4 is left for future work.

Recommended citation: Your Name, You. (2015). "Paper Title Number 3." *Journal 1*. 1(3). __http://academicpages.github.io/files/paper3.pdf__

** Published:**

This is a description of your talk, which is a markdown files that can be all markdown-ified like any other post. Yay markdown!

** Published:**

This is a description of your conference proceedings talk, note the different field in type. You can put anything in this field.

Undergraduate, *UCSD*, 2015

This course covers some topics in operations research, such as convex analysis, nonlinear programming, and dynamic programming. I do not currently teach this course.

Graduate, *UCSD*, 2016

This course trains third year Ph.D. students to conduct research, write papers, and make presentations.

Graduate, *UCSD*, 2017

This course covers topics in finance theory. I do not currently teach this course.

Undergraduate, *UCSD*, 2019

This course covers some some institutional details on the financial markets, bond pricing (including duration analysis), optimal portfolio problem, mutual fund theorem, Capital Asset Pricing Model, and option pricing (including bounds on option prices, suboptimality of early exercise of American call options, put-call parity, and binomial option pricing).

Undergraduate/Graduate, *UCSD*, 2020

This course covers the classical Arrow-Debreu theory of general equilibrium. The undergraduate course (Econ 113) meets 3 hours per week for 10 weeks and covers about 2/3 of the lecure note. The graduate course (Econ 200B) meets 3 hours per week for 5 weeks and covers the entire lecture note.

Graduate, *UCSD*, 2020

This course covers mathematical topics that are essential for economics, very quickly but rigorously.