# logit

1. ### Is this logit model a multilevel model, and what is the correct way to model it?

I am analyzing a sample of about 6000 actions carried out by about 500 multinational companies in about 80 countries during a 6 year period. Actions are carried out randomly, and are not longitudinal measurements for the same multinational over time. The actions can be of two types (A or B). My...
2. ### Binomial response variable with 3 continuous and 1 categorical predictor. Best test?

Hello I have a binomial response variable. Predictors are composed of 3 continuous variables (the results of a Principle Components Analysis of habitat structure variables) and 1 categorical variable (habitat type e.g. grazed or ungrazed). I want to test whether the 3 habitat variables have...
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### Two-Step Conditional Logit Model In Horse-Racing

I'm reading "Comparing the effectiveness of one- and two-step conditional logit models for predicting outcomes in a speculative market" by Johnson and Sung (2007). The paper can downloaded as a .pdf here: www.bjll.org/index.php/jpm/article/download/419/450 The part that I am having a...
4. ### Logit Model - technique to eliminate covariates

I have a model to build that employs a reference table of 5000 standard covariates that are transformed by the intersection of that reference table with the actual data table. These are mostly CATEGORICAL covariates. Better yet, they are BINARY ("Yes","No" or 1,0). The software I use only allows...
5. ### [stata] interaction terms in conditional logit

Dear all, There is a famous paper by Norton et al. (2003) which describes why stata's wrong about interaction terms in logit regressions. They propose program called inteff that you can download for stata. Maarten Buis also presents a way how to deal with it using odd ratios...
6. ### Getting values larger than 1 for a logit test?

I have run a logit test on a binary dependent variable "gambled?" against "Age" in STATA. I have the dependent variable coded as 0 for no and 1 for yes. However I have a coefficient of 1.54 on the independent variable "Age". How can this be in a logistic regression that is meant to be between 0...
7. ### Getting there with logistic regression - some (hopefully!) simple questions.

Hi all, Following my post the other day I am now at the writing up stage of my hierarchical logistic regression. I inputted 5 variables across 3 blocks, with the 3rd block becoming non-significant. 3 questions really: 1. How do I acknowledge the 3rd block was non-significant in my write up...
8. ### Modelling percentages in the closed interval [0-1]

Hi all, I am trying to model percentages which are in the closed interval [0,1] . Specifically, I am not modelling the probability of a yes/no outcome (for which logistic regression is often used), but I am modelling a continuous numeric variable which can take all the values in the [0,1]...
9. ### Logit regression to evaluate real price test

Dear statistically inclined people, I'm asking for your help in a real world price test evaluation. I've had two years of stats and econometrics back at uni a couple of years ago and am trying to scramble all my knowledge together - would be awesome if you could help me a bit :-). [Here a...
10. ### Logistic regression probabilities

Hi I have built a logistic regression model that predicts the response probability from a marketing campaign. The model ranks correctly (i.e. the lower scored customers take up the offer less often than higher scored customers), but the probabilities predicted by the model are never the same...
11. ### Subject responses in multiple period experiment

Hello Everybody, In an experiment, players play a game for 30 rounds. In each round, they choose either good A or good B. In various treatments, the incentives are changed in some way. I am interested in studying the difference in frequency of choosing good A in a control vs a treatment...
12. ### Comparing magnitudes of logit/ordered logit coefficient estimates

Greetings! I have a logit model with a number of independent variables which are binary and therefore measured on the same scale. I am stuck on what seems to be a fairly basic/straightforward issue. First, while I am aware that a direct comparison between the coefficient estimates should...
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### Factor analysis, what type of data can I use?

Hello everyone, I have a social science dataset composed of circa 40 variables. The data types I am using are quite diverse. The variables I am using (briefly put) are: are age, gender, educational background(1-7 scale), 7 point perception scales measuring the degree of trust in...
14. ### Made a categorical variale with 4 categories out of one with 55, now different result

Hi! I'm busy working on my research, but I ran into a problem. I'm using a logstic regression to estimate the influence of certain independent variables on my (dummy) dependent variable. Then I want to interpret the results with marginal effects. The problem is one of the...
15. ### Generating Predicted Probabilities in a Data Frame from a Logit Model

I'm trying to run a logit model in R which has only one predictor. I then want to construct a data frame with the predictor values on one column and the probabilities in another column. Using LDA methodology, I'm able to do the following. # RUN LDA r <- lda(y ~ x) ## FIND AND PLOT...
16. ### Stata to R conversion mlogit

I know R fairly well but have very little experience with STATA. I am trying to convert the below mlogit command in Stata so it is usable in R. Can anyone help me? mlogit conflict lc1 lc2 ltsc0 ltsc1 ltsc2 loi loic1 loic2 lois0 let letc1 letc2 lets0 lli limc1 limc2 lims0 lyo lyoc1 lyoc2 lyos0...
17. ### mlogit from STATA to R

I know R fairly well but have very little experience with STATA. I am trying to convert the below mlogit command so it is usable in R. Can anyone help me? mlogit conflict lc1 lc2 ltsc0 ltsc1 ltsc2 loi loic1 loic2 lois0 let letc1 letc2 lets0 lli limc1 limc2 lims0 lyo lyoc1 lyoc2 lyos0 llpo lpoc1...
18. ### Not Significant Coefficients

I've run a logit regression to estimate the probability of attending high school. I've done this for many years. The thing is that some coefficients resulted to be not significant in some years and significant in some others. So my questions are: 1- The fact that a coefficient is not...
19. ### Anova? Chi-square?

Hi, I've been asked to analyze some data and I wanted to get a second opinion on the way I plan to. I have a sample of 8000 teachers. For each teacher, I have their Teaching Specialty, Total Number of Nights they worked and Total number of day-time days they worked, following working the...
20. ### Should I include this variable or not?

Hello, My dependent binary variable is Turnout in 2010 elections (yes/no) and I'm performing logit analysis using a cross-sectional dataset. There's a variable though called Past vote in 2005 elections i.e. (Abstain,Conservative,Labout,etc) and, as we expected,its high correlated with...