ECO 231W

Undergraduate Econometrics

Typo on Homework 2

There was a typo in question 1(b) which asked about a regression you ran in part (a) of question 1, not part (k) as previously written. I have corrected it now.

Another typo on Homework 1

There was a typo in question 5. part (j) asks about a graph you drew in part (i) of question 5, not part (h) as previously written. I have corrected it.

Homework 2 is posted

You can find homework 2 in the download page.

Homework 1 is due on Friday 10/23 at 5:00 pm. You must upload the homework file in the
upload page. For details on how to upload your homework, read this. The password is the same that you used for homework 1. Consult your notes from 9/21, ask your classmates or email Alon if you forgot.

Your homework is a .do file (
ONE .do file!). For details about what is, and how to produce a .do file for your homework, read this (but more importantly, watch the Stata videos or come to the recitations). Find the data sets in the download page, unless specified in the homework.

PENALTIES IF THE FILE DOESN’T RUN

If your .do file doesn’t run, the TA will request that you fix it, and give you a deadline (usually until the next day). Each time he has to request a correction for the file to run, you lose 2 points. If you fail to make the deadline of a correction request, your homework won’t be accepted anymore. You choose which email we will use to contact you when you upload the file. Make sure that it is one that you check often.

LATENESS PENALTIES

Every hour past the due time, your homework loses 2 points. Here is a breakdown:

Received before 5:00 until 5:59: no penalty
Received between 6:00 and 6:59: -2
Received between 7:00 and 7:59: -4


and so on until 10 pm, at which time we will not accept your homework any longer. Read the policy on late homeworks
here.

NOTICE: the homework is due before or at 5:00 pm. We only start discounting points at 6:00 pm to allow for internet delays, browser reloading or any other unpleasant things that may happen. We will not accept any excuse related to technology. If you can’t rely on your connection, or your browser, then take measures to upload your homework earlier, or even better, the night before.

Think that there are way too many rules to follow in this course? Read
this.

Extra help from a TA

Your TA Zach will be this evening either at Meliora 210 or at Hark114 helping students with homework 3. After midnight he will move to ITS if necessary and stay there until very late. Check the forum for details.

More videos posted

Find 4 new Stata videos posted in our channel. The links are in the downloads page.

Stata videos

As you know, I will be out of town this week. I don’t know how good my internet access will be, so I may not be able to post anything this week. In case I can’t post, you should know that your TA David will be posting new Stata videos this week. The videos will be in our YouTube channel (find the link in the Download page). He will announce when he has done so in the Forum, so be sure check it out at least once a day this week to find out when the videos are up.

Homework 3 is posted

You can find homework 3 in the download page.

Homework 3 is due on Friday 3/20 (which is the week right after Spring Break) at 12:00 pm. You must upload the homework file in the
upload page the same way you did with homework 2. The password is the same as homework 2.

Your homework is a .do file (
ONE .do file!). You should know by now how to produce it. Find the data sets in the download page, unless specified in the homework.

PENALTIES IF THE FILE DOESN’T RUN

If your .do file doesn’t run, the TA will request that you fix it, and give you a deadline (usually until the next day). Each time he has to request a correction for the file to run, you lose 2 points (
THE PENALTY WENT UP FROM LAST HOMEWORK). If you fail to make the deadline of a correction request, your homework won’t be accepted anymore. You choose which email we will use to contact you when you upload the file. Make sure that it is one that you check often.

LATENESS PENALTIES

Every hour past the due time, your homework loses 2 points. Here is a breakdown:

Received before 12:00 until 12:59: no penalty
Received between 1:00 and 1:59: -2
Received between 2:00 and 2:59: -4


and so on until 5 pm, at which time we will not accept your homework any longer. Read the policy on late homeworks
here.

NOTICE: the homework is due before or at 12:00 pm. We only start discounting points at 1:00 pm to allow for internet delays, browser reloading or any other unpleasant things that may happen. We will not accept any excuse related to technology. If you can’t rely on your connection, or your browser, then take measures to upload your homework earlier, or even better, the night before.

Think that there are way too many rules to follow in this course? Read
this.

More Stata videos posted

You can find 4 new Stata videos in the Downloads page. You need to watch videos 2 to 8 for Homework 2.

About the .do files

Your homework is 1 .do file. Even if the homework has several questions, you must write 1 .do file that answers all. Make sure that you read the FAQ question about the .do files linked here. Also, to minimize the likelihood that your file does not run, always:

1. make sure to use the 'clear' command before using any data set in your do-files so that any previous data in STATA's memory can be cleared away.
2. with the 'use' command don't give in the entire path name of the data set, just write, use GPA2.dta, for example. You can set the home directory separately using 'cd'. The TA will then change the path and run the entire file without any problem.

Remember, you lose points if the file does not run on another person’s computer, so be careful with that. Ask any of the TAs if you have questions about that, especially the Stata TAs.

Password to upload the homework

You will need a password to upload the homework. I will be giving the password in the following classes:

02/23 and 02/25

Make sure that you come to at least one of these classes. Otherwise, ask another student that attended the class to tell you what it is.

Homework 2 is posted

You can find homework 2 in the download page.

Homework 2 is due on Friday 2/27 at 12:00 pm. You must upload the homework file in the
upload page. For details on how to upload your homework, read this. You will need a password. I will post another announcement with the instructions on how to get the password. Make sure that you read it.

Your homework is a .do file (
ONE .do file!). For details about what is, and how to produce a .do file for your homework, read this (but more importantly, watch the Stata videos). Find the data sets in the download page, unless specified in the homework.

PENALTIES IF THE FILE DOESN’T RUN

If your .do file doesn’t run, the TA will request that you fix it, and give you a deadline (usually until the next day). Each time he has to request a correction for the file to run, you lose 1 point (in the following homework you lose 2 points). If you fail to make the deadline of a correction request, your homework won’t be accepted anymore. You choose which email we will use to contact you when you upload the file. Make sure that it is one that you check often.

LATENESS PENALTIES

Every hour past the due time, your homework loses 2 points. Here is a breakdown:

Received before 12:00 until 12:59: no penalty
Received between 1:00 and 1:59: -2
Received between 2:00 and 2:59: -4


and so on until 5 pm, at which time we will not accept your homework any longer. Read the policy on late homeworks
here.

NOTICE: the homework is due before or at 12:00 pm. We only start discounting points at 1:00 pm to allow for internet delays, browser reloading or any other unpleasant things that may happen. We will not accept any excuse related to technology. If you can’t rely on your connection, or your browser, then take measures to upload your homework earlier, or even better, the night before.

Think that there are way too many rules to follow in this course? Read
this.

3 new videos published

You can find 3 new Stata videos in our channel. The links are in the downloads page. They are the first videos that teach you to deal with the program itself. It is a good idea to start watching soon and get on with homework 2 as soon as possible. You never know how much time programming will take.

Typo in Homework 1

There was a typo in Question 1 (a). It should read: “Briefly describe the ELS:2002 survey and whether it can be useful for the question in which the researcher is interested.” Originally I had ELS:2000, but that was just a typo, it should say ELS:2002.

The first video is uploaded

I uploaded the first Stata tutorial video. Check out the Download page. Unfortunately the video is not uploading at the maximum resolution. We are working to make this happen soon. Meanwhile, if you know how to upload videos to YouTube in HD, please let us know!

Why your do file may not run

There were a couple of recurring errors in the .do files in Homework 2. These errors are the most common reason why some of your .do files did not run. The TA corrected this himself, so it was not necessary to contact you. In any case, make sure that you do not make the same mistake in Homework 3. They are:

1) Make sure to use the clear command before using any data set in your .do files, so that any previous data in STATA's memory can be cleared away.

2) With the 'use' command, don't write the entire path name of the data set, just write: use GPA2.dta, for example. You can set the home directory separately using 'cd' in the beginning of the file. The TA is supposed to only change the directory path, and the file should then run in one go. He has all the data sets in his home directory. He is not supposed to read the entire code searching for the exact location where you loaded each data set, and change it.

Change of data set in homweork 3

Hi all,I had published the wrong data set for the homework. It was called WAGE2.dta, when the correct one is WAGE1.dta. I published the correct one now.

Homework 2 is posted

You can find homework 2 in the download page.

Homework 2 is due on Friday 10/05 at 12:00 pm. You must upload the homework file in the
upload page. For details on how to upload your homework, read this. You will need a password. I will post another announcement with the instructions on how to get the password. Make sure that you read it.

Your homework is a .do file. For details about what is, and how to produce a .do file for your homework, read
this (but more importantly, go to the Stata sections). Find the data sets in the download page, unless specified in the homework.

The homework is worth 25 points.


PENALTIES IF THE FILE DOESN’T RUN

If your .do file doesn’t run, the TA will request that you fix it, and give you a deadline (usually until the next day). Each time he has to request a correction for the file to run, you lose 2 points (in the following homeworks you lose 5 points). If you fail to make the deadline of a correction request, your homework won’t be accepted anymore. You choose which email we will use to contact you when you upload the file. Make sure that it is one you check often.

LATENESS PENALTIES

Every hour past the due time, your homework loses 5 points. Here is a breakdown:

Received before 12:00 until 12:59: no penalty
Received between 1:00 and 1:59: -5
Received between 2:00 and 2:59: -10


and so on until 5 pm, at which time we will not accept your homework any longer. Read the policy on late homeworks
here.

NOTICE: the homework is due before or at 12:00 pm. We only start discounting points at 1:00 pm to allow for internet delays, browser reloading or any other unpleasant things that may happen. We will not accept any excuse related to technology. If you can’t rely on your connection, or your browser, then take measures to upload your homework earlier, or even better, the night before.

Think that there are way too many rules to follow in this course? Read
this.

Homework 1 is graded

You can find them in the ECO 231W boxes in the second floor of Harkness. Check both boxes, as they get mixed up sometimes.

Homework 1 correction!

Homework 1 has a mistake. In question 1 item k, it says

Choose 5 variables from the codebook that best fit your ideas about useful variables from part (h).



The correct statement should be

Choose 5 variables from the codebook that best fit your ideas about useful variables from part (j).



I am uploading a new (correct) version of the homework in the
download page.

Homework 1 clarification

Question 4 in the homework was unclearly phrased. It said:

Now imagine that a researcher is interested in studying violence against women in the United States, specifically against sections of society which are relatively less focused in policy debates


I changed it to say

Now imagine that a researcher is interested in studying violence against women in the United States, specifically against sections of society which are seldom the focus of policy debates



In case it is not clear: I don’t mean the sections of society that don’t care about policy, laws, the government, etc. I mean the marginalized, ignored groups about which the government doesn’t seem to care.

Homework uploading password

I will be giving the password to upload the homeworks in the following classes:

10/01 and 10/03

Make sure that you come to at least one of these classes. Otherwise, ask another student that attended the class to tell you what it is.

Homework 1 is posted

You can find homework 1 in the download page.

Homework 1 is due on Friday 09/21 at 12:00 pm. You must leave it in the ECO 231W box in Harkness (there are two boxes there, either is fine). The Stata homework TA will collect them at exactly that time, so make sure that your homework is there before this time.

Your homework must be legible and organized, or you may get penalized.

Read the policy on late homeworks
here.

ATTENTION: remember to write your name (as it appears in your transcript), student ID, and class time.

Homework 5 is posted

Find it in the assignments page. It is not mandatory. You can discuss the questions in the Forum.

Homework 3 typo

Question 3, item 4 has a typo. I wrote two beta_6, when in fact the last one should have been beta_7. I fixed it.

Homework 4 is posted

Find it in the Assignments page.

ATTENTION: In homework 4, the theoretical part is worth 18 points. The empirical part is worth 2 points.

Always READ and FOLLOW THE RULES. Though they haven’t changed since the beginning, the punishment for disobedience gets stricter with every passing homework.

Homework 2 announcements

1. I am taking Q13 off the homework. It refers to the material of today’s class, so it’s too advanced. It will be included in homework 3, so if you already worked on it, all the best. You will follow today’s class much better, and you already did some work for the coming homework, so no loss. If you do not read this announcement in time, and hand it anyway, it will simply not be graded. When you get your homework back next week you can use what you did towards homework 3.

2. Q2.4 referenced question 1.3, when in fact it should be Q2.3. I fixed this. The reference is wrong because I had to change the homework from it’s first version (where Q2 was actually question 1).

Homework 2 correction

When I was modifying Homework 2 there was a phrase: “Class 7: Book problems 2.7, 2.11,...” that escaped me. This line should have been deleted. These exercises are not required for the homework. I posted a new version that does not have these.

IMPORTANT: Homework 2 reposted

At exactly this time I am reposting homework 2. You can find it in the assignments page. This is the homework version you have to hand in, ignore the previous version. If you were working on the previous version, you have to check whether your work can be used in the new homework, since most of the homework questions have changed.

Homework 2 is posted

Find it in the Assignments page. Take a look at it soon, it is long, and harder than homework 1. Also: READ THE RULES, there are no excuses for disobeying them.

Homework 1 is posted

Find it in the Assignments page. Take a look at it soon. The homework is long, and you may want to get started early.

Homework 3 is posted

Find it in the Assignments page. Always READ and FOLLOW THE RULES. Though they haven’t changed since the beginning, the punishment for disobedience gets stricter with every passing homework.

Homework 3 is posted

You can find homework 3 in the download page.

Homework 3 is due on Friday 10/12 at 12:00 pm. You must upload the homework file in the
upload page. For details on how to upload your homework, read this. The password is still the same as in the previous homework.

Your homework is still a .do file. Find data sets in the
download page, unless specified in the homework. The homework is worth 25 points.


PENALTIES IF THE FILE DOESN’T RUN

If your .do file doesn’t run, the TA will request that you fix it, and give you a deadline (usually until the next day). Each time he has to request a correction for the file to run, you lose 5 points. If you fail to make the deadline of a correction request, your homework won’t be accepted anymore. You choose which email we will use to contact you when you upload the file. Make sure that it is one you check often.

LATENESS PENALTIES

Every hour past the due time, your homework loses 5 points. Here is a breakdown:

Received before 12:00 until 12:59: no penalty
Received between 1:00 and 1:59: -5
Received between 2:00 and 2:59: -10


and so on until 5 pm, at which time we will not accept your homework any longer. Read the policy on late homeworks
here.

NOTICE: the homework is due before or at 12:00 pm. We only start discounting points at 1:00 pm to allow for internet delays, browser reloading or any other unpleasant things that may happen. We will not accept any excuse related to technology. If you can’t rely on your connection, or your browser, then take measures to upload your homework earlier, or even better, the night before.

Think that there are way too many rules to follow in this course? Read
this.

Homework 4 is posted

You can find homework 4 in the download page.

Homework 4 is due on Friday 10/26 at 12:00 pm. You must upload the homework file in the
upload page. For details on how to upload your homework, read this. The password is still the same as in the previous homework.

Your homework is still a .do file. Find data sets in the
download page, unless specified in the homework. The homework is worth 25 points.


PENALTIES IF THE FILE DOESN’T RUN

If your .do file doesn’t run, the TA will request that you fix it, and give you a deadline (usually until the next day). Each time he has to request a correction for the file to run, you lose 5 points. If you fail to make the deadline of a correction request, your homework won’t be accepted anymore. You choose which email we will use to contact you when you upload the file. Make sure that it is one you check often.

LATENESS PENALTIES

Every hour past the due time, your homework loses 5 points. Here is a breakdown:

Received before 12:00 until 12:59: no penalty
Received between 1:00 and 1:59: -5
Received between 2:00 and 2:59: -10


and so on until 5 pm, at which time we will not accept your homework any longer. Read the policy on late homeworks
here.

NOTICE: the homework is due before or at 12:00 pm. We only start discounting points at 1:00 pm to allow for internet delays, browser reloading or any other unpleasant things that may happen. We will not accept any excuse related to technology. If you can’t rely on your connection, or your browser, then take measures to upload your homework earlier, or even better, the night before.

Think that there are way too many rules to follow in this course? Read
this.

Homework 5 is posted

You can find homework 5 in the download page.

Homework 4 is due on Friday 11/02 at 12:00 pm. You must upload the homework file in the
upload page. For details on how to upload your homework, read this. The password is still the same as in the previous homework.

Your homework is still a .do file. Find data sets in the
download page, unless specified in the homework. The homework is worth 25 points.


PENALTIES IF THE FILE DOESN’T RUN

If your .do file doesn’t run, the TA will request that you fix it, and give you a deadline (usually until the next day). Each time he has to request a correction for the file to run, you lose 5 points. If you fail to make the deadline of a correction request, your homework won’t be accepted anymore. You choose which email we will use to contact you when you upload the file. Make sure that it is one you check often.

LATENESS PENALTIES

Every hour past the due time, your homework loses 5 points. Here is a breakdown:

Received before 12:00 until 12:59: no penalty
Received between 1:00 and 1:59: -5
Received between 2:00 and 2:59: -10


and so on until 5 pm, at which time we will not accept your homework any longer. Read the policy on late homeworks
here.

NOTICE: the homework is due before or at 12:00 pm. We only start discounting points at 1:00 pm to allow for internet delays, browser reloading or any other unpleasant things that may happen. We will not accept any excuse related to technology. If you can’t rely on your connection, or your browser, then take measures to upload your homework earlier, or even better, the night before.

Think that there are way too many rules to follow in this course? Read
this.

Homework 1 is posted

You can find homework 1 in the download page, where you can also find the data set needed to answer one of the questions, as well as the Stata videos. The homework covers up to and including video 7.

Homework 1 is due on Friday 02/10 at 5:00 pm. You must upload the homework file in the
upload page. For details on how to upload your homework, read this. You will need a password, which I will give out during class on 02/08 (if you miss class that day, find out the password from your classmates or email Youngmin on or after 02/08.)

Your homework is a .do file (
ONE .do file!). For details about what is, and how to produce a .do file for your homework, read this (but more importantly, watch the Stata videos or come to the recitations). Find the data sets in the download page, unless specified in the homework.

PENALTIES IF THE FILE DOESN’T RUN

If your .do file doesn’t run, the TA will request that you fix it, and give you a deadline (usually until the next day). Each time he has to request a correction for the file to run, you lose 1 point (in the following homework you lose 2 points). If you fail to make the deadline of a correction request, your homework won’t be accepted anymore. You choose which email we will use to contact you when you upload the file. Make sure that it is one that you check often.

LATENESS PENALTIES

Every hour past the due time, your homework loses 2 points. Here is a breakdown:

Received before 5:00 until 5:59: no penalty
Received between 6:00 and 6:59: -2
Received between 7:00 and 7:59: -4


and so on until 10 pm, at which time we will not accept your homework any longer. Read the policy on late homeworks
here.

NOTICE: the homework is due before or at 5:00 pm. We only start discounting points at 6:00 pm to allow for internet delays, browser reloading or any other unpleasant things that may happen. We will not accept any excuse related to technology. If you can’t rely on your connection, or your browser, then take measures to upload your homework earlier, or even better, the night before.

Think that there are way too many rules to follow in this course? Read
this.

Homework 1 is posted

You can find homework 1 in the download page.

Homework 1 is due on Friday 02/06 at 12:00 pm. You must leave it in the ECO 231W box in Harkness (there are two boxes there, either is fine). The Stata homework TA will collect them at exactly that time, so make sure that your homework is there before this time.

Your homework must be legible and organized, or you may get penalized.

Read the policy on late homeworks
here.

ATTENTION: remember to write your name (as it appears in your transcript), student ID, and class time or we may not record your grade.

Typo on Homework 1

There was a typo in question 5. The file you will need to use is CAS2001.dta , and not CAS2011.dta. I have corrected it. The file is available for download on the Download page.

Homework 1 is posted

You can find homework 1 in the download page, where you can also find the data set needed to answer one of the questions, as well as the Stata videos. The homework covers up to and including video 7.

Homework 1 is due on Friday 09/25 at 5:00 pm. You must upload the homework file in the
upload page. For details on how to upload your homework, read this. You will need a password, which I will give out during class on 09/21 (if you miss class that day, find out the password from your classmates or email Alon on or after 09/21.)

Your homework is a .do file (
ONE .do file!). For details about what is, and how to produce a .do file for your homework, read this (but more importantly, watch the Stata videos or come to the recitations). Find the data sets in the download page, unless specified in the homework.

PENALTIES IF THE FILE DOESN’T RUN

If your .do file doesn’t run, the TA will request that you fix it, and give you a deadline (usually until the next day). Each time he has to request a correction for the file to run, you lose 1 point (in the following homework you lose 2 points). If you fail to make the deadline of a correction request, your homework won’t be accepted anymore. You choose which email we will use to contact you when you upload the file. Make sure that it is one that you check often.

LATENESS PENALTIES

Every hour past the due time, your homework loses 2 points. Here is a breakdown:

Received before 5:00 until 5:59: no penalty
Received between 6:00 and 6:59: -2
Received between 7:00 and 7:59: -4


and so on until 10 pm, at which time we will not accept your homework any longer. Read the policy on late homeworks
here.

NOTICE: the homework is due before or at 5:00 pm. We only start discounting points at 6:00 pm to allow for internet delays, browser reloading or any other unpleasant things that may happen. We will not accept any excuse related to technology. If you can’t rely on your connection, or your browser, then take measures to upload your homework earlier, or even better, the night before.

Think that there are way too many rules to follow in this course? Read
this.

About the .do files

Your homework is 1 .do file. Even if the homework has several questions, you must write 1 .do file that answers all. Make sure that you read the FAQ question about the .do files linked here. Also, to minimize the likelihood that your file does not run, always:

1. make sure to use the 'clear' command before using any data set in your do-files so that any previous data in STATA's memory can be cleared away.
2. with the 'use' command don't give in the entire path name of the data set, just write, use GPA2.dta, for example. You can set the home directory separately using 'cd'. The TA will then change the path and run the entire file without any problem.

Remember, you lose points if the file does not run on another person’s computer, so be careful with that. Ask any of the TAs if you have questions about that, especially the Stata TAs.

Homework 2 is posted

You can find homework 2 in the download page.

Homework 2 is due on Friday 02/24 at 5:00 pm. You must upload the homework file in the
upload page. For details on how to upload your homework, read this. The password is the same that you used for homework 1. Consult your notes from 02/08, ask your classmates or email Youngmin if you forgot.

Your homework is a .do file (
ONE .do file!). For details about what is, and how to produce a .do file for your homework, read this (but more importantly, watch the Stata videos or come to the recitations). Find the data sets in the download page, unless specified in the homework.

PENALTIES IF THE FILE DOESN’T RUN

If your .do file doesn’t run, the TA will request that you fix it, and give you a deadline (usually until the next day). Each time he has to request a correction for the file to run, you lose 2 points. If you fail to make the deadline of a correction request, your homework won’t be accepted anymore. You choose which email we will use to contact you when you upload the file. Make sure that it is one that you check often.

LATENESS PENALTIES

Every hour past the due time, your homework loses 2 points. Here is a breakdown:

Received before 5:00 until 5:59: no penalty
Received between 6:00 and 6:59: -2
Received between 7:00 and 7:59: -4


and so on until 10 pm, at which time we will not accept your homework any longer. Read the policy on late homeworks
here.

NOTICE: the homework is due before or at 5:00 pm. We only start discounting points at 6:00 pm to allow for internet delays, browser reloading or any other unpleasant things that may happen. We will not accept any excuse related to technology. If you can’t rely on your connection, or your browser, then take measures to upload your homework earlier, or even better, the night before.

Think that there are way too many rules to follow in this course? Read
this.