Setting up my North Star — How time flies, I have worked as a data scientist in two different companies for over one and a half years now. In my previous article, I wrote about how I became a data scientist as an Econ Ph.D. At the end of the article, I shared some thoughts I…

my happy place — After several months of continuous writing, I have published a great number of blog posts and I feel it is time to organize them in one place. I cannot express how grateful I am for those who view, read, clapped, and responded to my articles. Watching the number of followers…

and how to avoid it with a practical workflow — In today's business landscape, relying on accurate data is more important than ever. The phrase "garbage in, garbage out" perfectly captures the importance of data quality in achieving successful data-driven solutions. While using the right model for forecasting or classification is crucial, it's impossible to achieve good results without reliable…

A look back on what I did right — Recently I read a book named Peak: Secrets from the New Science of Expertise written by Anders Ericsson and Robert Pool. The book challenges the common myth that expertise comes from natural talent. Rather, with ample examples in different domains, it proves top performances can be achieved, and skills can…

Python decorator is a very useful tool to help us code efficiently. As I mentioned in my previous article, coding efficiently is one of the principles I follow to be a better data scientist: Seven Principles I Follow To Be a Better Data Scientist Setting up my North Startowardsdatascience.com In this article, I want to uncover the use cases of Python decorators and discuss how…

My journey as an Econ PhD — As a data scientist with a PhD in economics, I always get a lot of questions about why I chose to be a data scientist, and how was my journey like. …

Embrace Causality — As the recent announcement on the 2021 Nobel Prize in economics, causal inference techniques and empirical studies based on observational data have come back to researchers' attention. The announcement says: This year’s Laureates — David Card, Joshua Angrist and Guido Imbens — have provided us with new insights about the…

Last year at this date, I published my first article on Medium. At that time, I was evacuated from the California wildfire while receiving rejection after months of interviewing with my dream company. At the lowest point, I made the best decision to start writing on Medium, the platform that…

Part 2, A beginner’s guide to the LDA Model — In my previous post, I introduced the clustering algorithm and discussed the K-Means algorithm in detail as the first part of the topic modeling series: Part 1: A beginner’s guide to K-Means Part 2: A beginner’s guide to LDA (this article) Part 3: Use K-Means and LDA for topic modeling…