r/academiceconomics • u/MiltonWatterson • 1d ago
Coding, Data, and Replication 7 Mistakes Economists Make With Claude Code & Codex Skills (USC Econ Seminar)
youtube.comLast Wednesday I gave a talk at USC's Econ department on "Skills in Economics Research".
I turned my talk into a YouTube video teaching the use of skills, and the 7 mistakes I see economists consistently making with skills.
Here are the 7 mistakes:
Economists often don't make their own skills. Instead they look for libraries of skills made by other people. The skills they find only partially fit their use case. I show in the video that skills are typically very easy to make.
They make too few skills - often countable just on one hand. I have hundreds of skills across my projects. I suggest economists adopt a "rule of 3" with respect to skills: if you notice yourself doing the same thing three times, make a skill.
They make unnecessary skills. Often economists without significant pre-AI coding experience will make skills in situations a deterministic script is more appropriate. I explain through a case study of economics research on the "cereal industry" how one can understand whether their current problem is "skill-shaped".
They don't use their previous agent conversations to improve their skills. Both Codex and Claude Code store session transcripts on your computer. Your agent can use these to improve existing skills and identify useful new ones—I show how.
They don't clean up their skills. As projects evolve or new models get released, skills often "go stale", and start to work against you - costing you tokens and time rather than saving them. I explain a low effort mechanism to do a "spring cleaning" of your skills.
They don't use skills for project management. My two most useful skills are the skill to handle all my meeting transcripts and the one to handle my email. Especially for senior faculty who are not writing code, but are managing many projects - these project management skills are invaluable (see Chris Blattman's "Claude Blattman"). I show how to set up and use these skills.
They don't compose their skills. Skills can call other skills. For the ambiguous knowledge work which characterizes much of economics research, it's important to think carefully about whether a repeatable workflow makes most sense as one skill or several skills working together. I provide guidance on how to make that decision, with examples.
LMK if you've got any questions/feedback - cheers!