WAY TOO HARD

His tests are so hard, he asks questions that weren't stressed in lecture or in reading. If possible aviod having anything to do with this guy

I wish I had met Billy in a bar not a classroom. He's a personable guy who cannot relate material to students well. He teaches as if he is reminding, not introducing. new material. His exams and homework's have typo's throughout, he mumbles and trails off his sentences just as he's getting to the meat of the concept, and his ppts are inconsistent.

If I knew Billy was going to teach likes this I would have dropped his class in the first week. He just sits in his chair in the front of the room reading the lecture slides. He doesn't teach at all, more like he reads the slides and expects us to understand what he said. If you are in his class, you are better off teaching it to yourself.

By far the worst teacher I have had at CU. Doesn't teach and expects you to know all the material. Billy simply review al the slides as if we all had prior knowledge. Billy also taught intermediate macro in an introductory course. Very confusing. He has officially made me hate my minor. Do not take his class, b/c you are better of teaching yourself

This professor taught me nothing. His powerpoints are vague and uninformative, and he won't help you if you ask for it. Be prepared to learn everything by yourself, and don't expect him to tell you (even after you submit the tests and get your grades) what the correct answers should be. Absolutely terrible teacher

Terrible, terrible professor. Calling him a professor would imply he taught me something, however. Avoid at all costs.

Hardest teacher I have ever had, if you are not an applied mathematics major good luck, he assumes you know everything and moves at a very fast pace. Not helpful at all worst teacher i have ever had

Had him for 2010 online. He taught me nothing. All I did was read the textbook. Don't recommend taking his online course.

Just a very unhelpful professor. Will not be taking again.

The worst professor ever! I took his online class and I learned nothing, not helpful at all. Totally just wasted my money and time. If you want to learn something, don't take his class.

By far the hardest class I have taken. The professor is unhelpful and a tough grader. Very unfair. Avoid this course it will ruin your semester and stress you out.

Doesn't provide any feedback at all and is very hard to get ahold of

online Econ class was absolutely awful. Assigns multiple chapters for one exam. Exam questions are nothing like the notes he posts online. Literally took him weeks to respond to multiple emails about questions and is not very helpful when you ask for reasoning or why something is as it is. Would highly not recommend.

Mertens believes that forcing students to adhere to his unforgiving and redundant teaching system is the best way to learn. He cites recent studies as evidence, and fails to take into account student learning styles. His attitude toward the class is rude, evident by his syllabus in which he mocks FAQs and threatens to lower grades for accidents.

Worst teacher I've ever had. Lecture notes are hardly explained, extremely sparse & any math is done by him in class. The math he does do is very graph heavy, not helpful for application. Rude to students & doesn't offer help if asked questions. Test q's are very hard to prepare for. Much learning comes from dense economic articles w/ no guidance.

Worst teaching experience Ive ever had. Maybe lectured twice, relies on students to teach class. Comes across as wasting his time when you ask questions. Extremely hard and unfair tests. Relies only on group assignments. Ive never had a teacher who seemed like they didnt care about my success more than him.I didnt miss class and learned nothing

I wish I had never taken this class or any class taught by this professor. His teachings are lazy, as he only lectures around 3-5 times a semester and still expects you to learn all of the economic models. He relies on group led discussions held by the students to teach concepts, while he sits back stealing our money. Doesnt even post notes.

DO NOT TAKE EVER EVER

This professor is completely inept and ignorant to any problems a student might face. I would highly recommend choosing any other economics teacher at CU. He seems to be lazy and tired.

Probably one of the worst professors I've had to deal with. I messaged him for an extension of the assignment a week before it was due, he sent me a message two days after saying he went to extend it but saw I had already done it. Class is taught all through cengage, including tests. Looked at his notes maybe once. Chegg will save you here, use it

Literally jumps straight into material assuming that you know everything. Super fast paced with no regards to the class learning what he's teaching. Puts us in groups and thinks that it'll help us for the exam and he literally wants us to write our exam on paper and submit a file while using proctorio for exams. Inefficient teaching style.

Extremely lazy. The in class notes he posts on canvas are pretty much useless. They direct you to class slide which literally have nothing important on them. Uses break out groups to work on class problems but no one even converses in break out rooms so its pointless. Rushes through material assuming you already know everything.

Worst teacher I've taken at CU. Doesn't care about the class, teaches to the pace of the fastest student and leaves everyone else behind. Would never take another class with him, I recommend you dont

Fast paced , you better already be good at the material . This is very prevent when you look at test scores for his class with a very small portion of students getting over 100% because of a curve and the rest with a D-C grade (yes a few B's too). class average of 70% when majority is below a 70% not a good sign.

Dr. Mertens is nice enough, but his class is brutal. It's so much work for such a typically simple subject (microeconomics) so be ready to bust your butt. His curves are insignificant and the exam prep guides are nonexistent. Taking microeconomics online was one of my worst mistakes to date :)

The other day, he managed to stump the entire class. Nobody could keep up. He seems like a nice guy, but he's very poor at actually teaching much of anything, is extremely fast, assumes you're already already familiar with things he hasn't taught yet, and spends an unnecessary amount of time on group work. Highly recommend against taking him.

Absolute rudest human I've met. like he creates the class to ensure you fail. slides are unorganized, don't make sense, doesn't communicate with TA so class and recitation differ, said by TA himself. grade is 80% exam and no cheat sheet. He might have a phD but he cannot teach AT ALL. cannot even return the good morning in emails. DONT TAKE HIM!!!!

DOESN'T TEACH AT ALL DON'T TAKE HIM

My biggest peeve with him was that he does NOT put anything in the grade book. Very test-heavy class, long, and exhausting assignments for an intro level class. He expects you to fail the test and then give a huge curve, which in my opinion, is very stressful. Expect to get a C at best. Don't take his class.

Does not explain lecture material, and just does stuff and expects you to understand whats going on. Your grade is based entirely on attendance and exams. Does not post helpful materials, and theres no home. He has a video posted titled "Its in the Syllabus", and then does not have any description or recommendation of what to read. We just guess.

Writing this before the final, don't think I'm gonna pass. Overall, just a terrible professor. Lectures from day 1 make little to no sense. No homework to help for the 4 tests, your grade is entirely based on. Stand-offish and rude. Doesn't communicate with TA. Group assignments are an auto 90%. Does the absolute minimum to help.