Overall, I thought Professor Hahn was an effective lecturer. There is no homework; the only grades are a midterm and final, so it is up to you to hold yourself accountable and stay up to date with the material. If you put things off, it is easy to be overwhelmed, and you will have a hard time catching up. Timing on the exams was quite tough, but most people have this issue and the class is curved anyways. For anyone who is interested in econometrics/statistics, I’d highly recommend taking Econ 41 with Hahn. He gives you an in depth look at the material with proofs.

Professor Hahn is not that bad. I appreciated how articulate and clear Hahn was in explaining concepts. Like seriously, this guy is my type of lecturer: perfectly clear and articulate. His tests are kind of challenging but nothing out of the norm. To do well in this class, you should know how and when to apply the calculus formulas he provides on his tests, and you should know definitions very well. Seriously, the 'tricky' questions almost always just require you to manipulate a bit or have knowledge of exact definitions which isn't hard if you study them with flash cards or something. Overall, a good lecturer and very underrated imo.

3 years at UCLA and Hahn is the absolute worst teacher I have ever taken. He allocates time to specific subjects terribly. He will spend hours on the easiest subjects in the class but then glance over the hardest parts and just says "you should know this already" and laugh. He was insanely anal about exams to the point where he took away the "cheat sheet" that you used to be able to use. He keeps you locked in the classroom until they confirm that everyone took the test which can be around 15 minutes after the exam is over. Also prepare to hear "the tests are simply a reflection of the homework" HAHAHAHA the most certainly are NOT. His exams (though multiple choice) are nothing like the homework. Averages are around 60%. Whoever guesses better wins. Good luck lol.

Hahn is very difficult. Tests are time constrained and as of 2018, the calculator is limited to standard 4 functions + root. No note sheet. 62 Qs, 120 min final. Midterm is 31Q, 75 min. Tests include proof-based questions that rely on exemplary knowledge of content.

Explanations are far too complicated for such an elementary class. Grading is 40% midterm and 60% final. Hahn is clearly incredibly intelligent, but perhaps too qualified to teach this class. No attendance, lecture notes online, HW.

Perhaps a good choice if you have a truly excellent grasp of the content. Prior intro stats classes (AP, community college) don't really prepare you for it.

I suspect that all glaringly positive reviews are deceptive econ majors trying to get you in the class to bring the curve down.

Absolutely fucking awful exams. Professor Hahn is extremely anal about his test taking, and the exams themselves are more a test of time than of the material. some questions are absurdly difficult to do with only a pencil and a canon LS-100TS calculator. cheat sheets are no longer allowed, despite what previous reviews say. terrible professor.

Good class overall. Need textbook for HWs and exams. Selling book for $80 (new costs $120). Email: *************

Fair professor.
Sell the textbook. Text **********

Hahn is pretty good. His strictness about his grading scale and test taking methods is a bit bizarre though. Was at the average on the first midterm, and got top 5 on the final, ended up with an A. I attended class the first half of the quarter, and stopped going and never went to discussion and just did the HW problems until I was able to do them without thinking. You need to be able to test quickly, but I never felt like I was in a time crunch. The notes he provides are very thorough, and pretty much have everything you need to know.

Definitely the best professor I've had in the department.

Hahn is a good professor. He's articulate, has a well-organized course structure and makes good effort toward making the subject understandable. His class, as he mentions a lot, is to prepare students for 103, which is great because then he doesn't waste time on ridiculous long mathematical proofs (because why reinvent the wheel) unless there's something to be learned from the proof itself.

That said, the class is no fun. If you know his lecture notes well and if you really understood the practice problems (like 5 every week, which weren't even mandatory), and possess an above-average intelligence level, you'll do well in the class. His exams had really tricky options (like .2896 when the answer was .2986), and seemed time-constrained for a majority of the students, but well, that's when the curve helps. 25% of the top students get some A.

His teaching style is slow and sometimes the lectures seem drab. But it seems like he's one of the easier 41 professors.

Take Hahn. He's nice. And you'll learn some stuff WELL for 103.

I just finished taking a course with Professor Hahn. I haven't seen my grade so this is somewhat unbiased.

Professor Hahn provides all of his lecture notes online that include about 5 practice problems per section. Print them out and bring them to lecture because the notes on the board are supplemental to the online notes. There are only four chapters. The homework problems are ridiculously simplistic relative to his tests. I would definitely recommend knowing how to do these very quickly because a few are reworded on the test and are easy points.

His class was 50% midterm, 50% final. There were 36 questions multiple choice for the midterm and 71 on the final. VERY time constrained and the average was in the mid-60s for the midterm. Final grades haven't been released yet. However, people still got raw A's on the midterm so it is possible. He follows the department's guideline and assigns A's to roughly the top 25% of the class.

His tests are similar to the SATs. Know the concepts really well and go to lecture to see what he emphasizes. If you know all your formulas and know how to manipulate them, you should be able to do a lot of the test. Then there are the ridiculous questions that take forever to solve...I couldn't tell you how to tackle them because I didn't find an efficient method.

As for Hahn himself...he's Harvard educated so he's very articulate. He also speaks perfect English in case you were worried about a language barrier. He likes to elaborate on topics in the notes, so glance at them before class. He also frequently mentioned that this course was designed to prepare students for Econ 103 and that teaching material relevant to 103 was his main goal, which I appreciated. The quarter ended pretty fast...his last lecture was Wednesday Week 9 so there was a review session and a question forum on Week 10. It was nice he finished the material early but it felt a little rushed.

The TAs that taught this quarter were Matias and Jesper, in case either of them TAs again. Matias goes over basic aspects of the concepts and then provides shortcuts to solve for them by manipulating formulas. This definitely helped with the tests so if Matias TAs again, I HIGHLY recommend going to his section. Jesper is a little more low key about what will be on the test, but he goes in depth so that you understand the material conceptually.

Despite my review, please keep in mind that this was a very painful course. Econ 41 is not Stats 10...I can tell you that.