Gov2001 March 2011

gov2001@lists.gking.harvard.edu

28 participants
49 discussions

"King Tomz and WIttenberg" - Post-Treatment Bias question

by Agelos Berios

In discussing Garrett's paper, "King Tomz and WIttenberg" finds that left labor power has a distinguishable effect only when exposure to trade or capital mobility is high. The paper finds Garrett's claim that "left" always outspends the "right", regardless of level of market integration, could be right, as a tendency-propensity, but it could be also attributed to chance alone. In light of my new found awareness of Post-treatment Bias, and subject to Garrett's data set(the countries he looked at), could we look as Garrett being correct because, richer countries(where the "left" when in power can spend more), tend to have a more "open" market-economy? The propensity to spend more could always be there for the "left" regardless, but in the absence of resources, how can they spend? Of course if the findings take the country variable as fixed (same country or countries) and are based on specific countries pulling a switch from "closed" to "open" (since we are dealing with panel data), my thinking is flawed. "King Tomz and WIttenberg" though, quotes Garrett as "...where countries were highly integrated into the international economy ...", implying that Garrett distinguishes among countries... which allows me to think the possibility exists... Agelos _______________________________________________ gov2001-l mailing list gov2001-l(a)lists.fas.harvard.edu http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l

13 years, 2 months

Zelig error message: "Design Appears to be Rank-Deficient"

by Alexander Hertel-Fernandez

Hello 2001istas, I was wondering if anyone had encountered this error message before when using Zelig or the ordered logit function in R: "In function (formula, data, weights, start, ..., subset, na.action, : design appears to be rank-deficient, so dropping some coefs" I'm getting it in response to an ordered logit model I'm trying to fit, specifically when I try to put in a factor variable for year dummies. What does it mean/what should I do? The regression runs but drops the year dummy factor variable. I get the same problem if I create my own dummy variables for the years, too. Thanks for your help! --Alex -- Alexander Hertel-Fernandez ahertel(a)fas.harvard.edu alexander.hertel(a)gmail.com 765.430.2063 _______________________________________________ gov2001-l mailing list gov2001-l(a)lists.fas.harvard.edu http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l -- gov2001 mailing list served by Harvard-MIT Data Center List Address: gov2001(a)lists.gking.harvard.edu Subscribe/Unsubscribe: http://lists.gking.harvard.edu/?info=gov2001

13 years, 2 months

R-Help Forum

by Brandon Stewart

Gov 2001, We had an excellent suggestion this week from a student on the reading quiz. She suggested that it might be nice for true R novices to have a space to help each other out with really basic R questions without having to bombard the list. Now generally, we think if you have a question, you should absolutely send it to the list (or search the list archives!). Its the fastest way to get answers. However, under the theory that some people will hold back their questions rather than send them to the list, we have created the R-Help Forum (on the course website). Feel free to post here about any R related questions. Molly and I will check in occasionally and experienced R users can get "participation credit" by showing up to share their expertise. Hopefully some of you will find this useful. That being said, keep using the list! Brandon _______________________________________________ gov2001-l mailing list gov2001-l(a)lists.fas.harvard.edu http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l -- gov2001 mailing list served by Harvard-MIT Data Center List Address: gov2001(a)lists.gking.harvard.edu Subscribe/Unsubscribe: http://lists.gking.harvard.edu/?info=gov2001

13 years, 2 months

Challenge Problem

by Brandon Stewart

Hi Folks, For those doing the challenge problem, there was a typo in my original slides including the EM update step for Y*. I changed it (Friday morning, I think), but I think some people are still referencing the old, erroneous material. Sorry! Brandon _______________________________________________ gov2001-l mailing list gov2001-l(a)lists.fas.harvard.edu http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l -- gov2001 mailing list served by Harvard-MIT Data Center List Address: gov2001(a)lists.gking.harvard.edu Subscribe/Unsubscribe: http://lists.gking.harvard.edu/?info=gov2001

13 years, 2 months

FW: data from STATA

by Laurel Grassin-Drake

Yes, that works. Actually, I'm now wondering if the problem was in using the coding at the bottom of pg. 2, because it never pulled up the data under the variable name with "variablename". But the datasetname$variablename works. Thanks! Laurel From: Adam Chilton [mailto:adam.s.chilton@gmail.com] Sent: Sunday, March 06, 2011 1:02 PM To: Laurel Grassin-Drake Subject: Re: [gov2001] data from STATA Hi Laurel, I spent forever trying to load the data and get the variables right, so I know how frustrating that can be. My guess is the problem you are having is that you are not converting it to be a data frame. You are welcome to take a look at my code for loading it though. library(foreign) data <- read.dta("fearondata.dta") as.data.frame(data) dim(data) names(data) head(data) vars.m1 <- data.frame(data$onset, data$warl , data$gdpenl, data$lpopl1, data$lmtnest, data$ncontig, data$Oil, data$nwstate, data$instab, data$polity2l, data$ethfrac, data$relfrac) data2 <- na.omit(vars.m1) which(data2[,1]==4) data2[2396,1] <- 1 data2[2396,1] head(data2) as.data.frame(data2) On Sun, Mar 6, 2011 at 12:54 PM, Laurel Grassin-Drake <lgrassin(a)mit.edu<mailto:lgrassin@mit.edu>> wrote: Thanks for the help. But now I've been struggling with trying to use the data. I've finally figured out that R seems to be separating the data into groups such that it is creating a matrix with fewer columns and more rows. So it takes the first X variables and populates n rows with the data, but the next group of variables start at row n+1 instead of column X+1. Anyone know what I need to do? Thank you. Laurel From: gov2001-l-bounces(a)lists.fas.harvard.edu<mailto:gov2001-l-bounces@lists.fas.harvard.edu> [mailto:gov2001-l-bounces@lists.fas.harvard.edu<mailto:gov2001-l-bounces@lists.fas.harvard.edu>] On Behalf Of Colin Sullivan Sent: Sunday, March 06, 2011 9:54 AM To: Class List for Gov 2001/E-2001 Subject: Re: [gov2001] co-authors Laurel - you have to use the "foreign" library; then it will find the command. Colin On Sun, Mar 6, 2011 at 9:42 AM, Laurel Grassin-Drake <lgrassin(a)mit.edu<mailto:lgrassin@mit.edu>> wrote: Dear all, I know this is pretty basic, but how do I import the data set for this week's pset into R? I've tried read.dta, but the program tells me that it couldn't find the function. Thanks. Laurel _______________________________________________ gov2001-l mailing list gov2001-l(a)lists.fas.harvard.edu<mailto:gov2001-l@lists.fas.harvard.edu> http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l _______________________________________________ gov2001-l mailing list gov2001-l(a)lists.fas.harvard.edu<mailto:gov2001-l@lists.fas.harvard.edu> http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l _______________________________________________ gov2001-l mailing list gov2001-l(a)lists.fas.harvard.edu http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l

13 years, 2 months

co-authors

by Molly Roberts

Hi everyone, Just a reminder that the deadline to choosing a paper to replicate and having it approved is this Wednesday, March 2. If you are still looking for a co-author, please e-mail me (not the Class list) and include a brief description of what subject areas you are interested in. I will help you find a co-author. Extension school students, you can ignore this e-mail. Hope everyone is having a great weekend! Best, Molly _______________________________________________ gov2001-l mailing list gov2001-l(a)lists.fas.harvard.edu http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l

13 years, 2 months

(no subject)

by Mark Bell

Is anyone else having difficulty accessing last years lectures? It's never been a problem for me before, but it doesn't seem to be working at the moment - it seems to be getting stuck trying to load the list of all the lectures (the same thing is happening in both Firefox and Safari so doesn't seem to be a browser issue) _______________________________________________ gov2001-l mailing list gov2001-l(a)lists.fas.harvard.edu http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l

13 years, 2 months

linear in means?

by Adela Soliz

Hi class, Maybe someone can answer a question I and my partner have about our replication paper. It says modeling children's schooling decisions "results in the standard linear-in-means empirical model." Is that just a fancy way of saying that children's schooling decisions can be modeled using linear regression? Thanks! Adela _______________________________________________ gov2001-l mailing list gov2001-l(a)lists.fas.harvard.edu http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l

13 years, 2 months

Access Issues (Continued)

by Brandon Stewart

Gov 2001, It sounds like some people are still having trouble accessing the section/lecture videos from this year. If you are still having a problem, we're sorry! I am sending another request to our IT contact so I want to get the info for everyone who is still having trouble. If you can't access the video please send me: 1. Your Harvard ID # 2. Your School and University (FAS, Harvard for example would be mine) Thanks everyone! Sorry this is still an issue. Brandon _______________________________________________ gov2001-l mailing list gov2001-l(a)lists.fas.harvard.edu http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l -- gov2001 mailing list served by Harvard-MIT Data Center List Address: gov2001(a)lists.gking.harvard.edu Subscribe/Unsubscribe: http://lists.gking.harvard.edu/?info=gov2001

13 years, 2 months

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Gov2001 March 2011