# Double Slit Experiment and Bayes

Nov 12, 2019       16 mins     Tag: modeling
Is there anything we (statisticians) can still learn from Quantum Physics under a classic probability framework?

# Uncertainty of a Brownian Bridge

Oct 30, 2019       1 mins     Tag: zombie
As a Bayesian statistician, I almost love the use of the word “uncertainty” as if that manifests my expertise in inference–until recently someone talks to me that they will stop talking to me as there...

# The Community Standards, the First Amendment, and the Gaussian Kernel

Oct 08, 2019       7 mins     Tag: zombie
I mostly only write statistics stuff on this blog. In part it is understandable why sparsity is desired – such that we only have statistics in our life, and no more worries about how to...

# Bayesian as modeling vs Bayesian as computation

Sep 23, 2019       2 mins     Tag: casual, modeling
I came up with this random thought when I was sitting in Andrew’s class this afternoon (as a TA). In order to emphasize why Bayesian is different, Andrew listed a few alternatives for data analysis,...

# Napoleon's March is to a Dirichlet process what a boxplot to a Gaussian distribution

Sep 21, 2019       2 mins     Tag: visualization
I saw a visualization of wealth distribution in the 2019 Credit Suisse Global Wealth Report (https://www.credit-suisse.com/about-us/en/reports-research/global-wealth-report.html)

# Division of random variables

Sep 18, 2019       1 min Tag: casual
This is trivial math question but it once bothers me in the construction of Dirichlet process using stick breaking process. The context is that if $V \sim beta(1, M)$ and $\theta \sim Dirichlet (\bar \alpha)$...

# Historical Materialism

Aug 31, 2019       4 mins     Tag: causal
reserve-mode causal is hard.

# A utopian kitsch coated with xenophobia and chauvinism

Aug 18, 2019       4 mins     Tag: zombie
That said, xenophobism is xenophobism, no matter coated with a caucasian supremacism, or a seemingly-progressive popularism, or even when it is companied with a chauvinistic salute towards another group of straw men.

# How to elegantly embed pdf image into markdown

Aug 05, 2019       2 mins     Tag: zombie
No you cannot

# Sharpe ratios

Aug 01, 2019       1 mins     Tag: zombie
This is a jitt question in Andrew’s class: to (by hand) approximate the standard deviation of X/Y if X is N(5,1) and Y is N(1,3).

# The Curse and the Blessing But Mostly the Blessing of Multimodality

Jul 30, 2019       18 mins     Tag: computation
What if I run 4 chains and find $\hat R >>1$

# ABC, Model Misspecification, and Bimodality

Jun 18, 2019       5 mins     Tag: computation
Like importance sampling, ABC is in principle immune to metastability that MCMC has to suffer, but ABC is also problematic as we have no idea what it will converge to when the model is misspecified.

# non-parametric MLE

Jun 17, 2019       1 mins     Tag: zombies
When I talked to someone about the old proof the invariance of odds ratio in a respropective sampling, I mentioned the estimation of $q(x)$ is achieved by its non-parametric MLE or its empirical distribution (see...