easiest class i have ever taken. since like preschool. but we never really got to see the professor. we just watched lectures that another professor made. so kinda weird

Tests were easy online with open notes, but I can imagine in person that they would be more difficult. I don't think he transitioned online well and I was often confused by what needed to be done week to week because he had his own slides and lectures, another professor's slides and lectures, and a textbook Chapter. It seemed like information overload every week. There is no week to week homework, just stay on top of all the readings. Grade based all on two midterms (25% each) and one final (50%). Kind of stressful in the end, but the open note policy for online class was nice. The practice problems on the Cengage book you have to buy are the best way to study.

I only attended the first lecture. After that, I mainly relied on reading the textbook and taking notes to learn and understand the material. His lectures are fine, but they are pretty much a summarized version of what the textbook offers. Because of this, it could be a lot more helpful to go through the textbook yourself rather than relying on a watered-down summary. Test questions are usually not memory-based and require you to understand the material and be able to apply it. Homework questions were quite similar to test questions, so you should definitely make sure you understand those and consult your TA if you have any questions.

I took this during Covid Times. Although I didn't learn a whole ton, I thought this class was extremely easy to do well in. Lectures are pointless by the way.

Rojas always gives fair exams and will create more office hours if you need extra help. Econ 41 is a fairly tough class in general, but he makes it easier than other professors. I would recommend taking it with Rojas.

He didn't teach that well and just basically read off the slides. But, he went through the material for the chapter, so it was fine. The tests were unclear many times and tested concepts that we didn't really cover or at least not in any real depth. Much of the homework didn't compare to the tests. He also didn't conduct the final well since the software glitched halfway through and he gave us an extra 15 mins even though it was down for a lot longer. There wasn't any real workload though, just the homework due every Friday which I think you could check up to three times. Overall, he's not terrible if you need to take the class, but he's not amazing either.

His notes were very detailed which helps when studying. The exams were okay since he didn't really include concepts not taught during class or on past exams. The professor's goal is always for the students to fully understand each concept, even if it means going slower than the syllabus. Rojas also made an effort to connect almost each topic to how it is used in finance/economics. I would definitely take another of his courses.

I took this class during the pandemic so things may be different during a normal quarter, but either way I strongly recommend against taking this class. Professor Rojas was highly uncommunicative, rarely responded to emails, and was not very understanding. He assumed we knew material from Econ 41 that we hadn’t actually learned and refused to teach it to us. Lectures were basically Rojas moving his mouse around the screen and reading through the notes, which were extremely long, disorganized, and often incorrect, and he sometimes entirely skipped important sections. You’re required to code in R for homework assignments and interpret it on exams. While R is a useful language to know, there is a disconnect between the amount and difficulty of coding that is required for homework and the basic knowledge you need to have of R for exams. Additionally, the homework took at least five hours to complete each week, and during the first week it took around fifteen hours because of the steep learning curve. Rojas was not very helpful with teaching us R and told us to look up everything online whenever someone had a question rather than answering. Grades consisted of homework (15%), two midterms (20% each), and the final (45%). The first midterm went well, but since the average was higher than what the professor expected he assumed there was cheating and made the second exam heavily proctored. The final was also proctored, but everyone had so many technical difficulties with the software that it was removed and just proctored over Zoom. All exams were open note, which was helpful, but while we had no restrictions on the length of our study guide for the first exam the rest had some page limits. There was very little practice material for the midterms and none for the final, and what was given was often incorrect. While Professor Rojas is knowledgeable about the subject, I did not find his teaching very effective and I would not take this class again.

Econ 103 and Econ 103L are the classes using Statistics knowledge at Economics Department. The good thing to learn Econ 103 with Professor Rojas is that he has a very decent knowledge of Stats and often make the points very clear to non-stats major students. Besides, he is very polite and helpful both during his class and his office hours. He likes to make sure every students are clear on the subjects. If you attend his lectures (highly recommended, very clear) and do the exercises, you should be fine on the midterm and finals as they are pretty straightforward. Highly recommended :) Professor Rojas is the BEST Professor ever! I would love to take more classes with him.

Lab lectures were very unhelpful. This quarter we were required to complete homework assignments in R and essentially learn the language in a couple of weeks, but the lab did not help at all. Later in the quarter instead of teaching us new concepts that were relevant to the homework, Rojas introduced us to machine learning and other concepts that were useless for assignments and exams. Overall the integration of the lab with the class was not the best and lab lectures were a waste of time.