# dummy variables

1. ### Dummy Variable Help

Hi, I require checking on how I constructed these dummy variables and see If I did them correctly. Firstly, the data. Time period (1-30) of the study (from 3/18/51 to 7/11/53) Year within the study (0 = 1951, 1 = 1952, 2 = 1953 The first attachment is the set of original data and the second...
2. ### Finding the worst mobile phone by Regression and Data Mining

we have about 50000 models of mobile phone (like Galaxy S7, iPhone 9) in database and the size of data is about 3 million. We want to find the mobile phones that have the least call success rate ( the numbers of successful call divided by total call). We want to run a Regression model to find...
3. ### Usage of monthly indicator variables in a Weekly dataset

Hello, I am a newbie and request some inputs on the usage and impact of indicator variables in regression analysis. I have a weekly dataset and intend to use regression analysis for prediction. To model seasonality, what are the pros/cons of either a) using 12 monthly (weighted) indicator...
4. ### Interaction effects regression wiith dummy variables

Hello everyone, I am doing an analysis about the export diversification effect during the financial crisis. I have my dependent variable as log (GDP per capita) and some independent variables. To measure diversification I calculated an Index which is called HI, this Index takes values from...
5. ### Reporting Dummy Variables and Determining Significance

Hi all, I was just wondering, how does a person determine the significance of a categorical variable in a hierarchical regression model if one dummy variable is significant and the other is non-significant? So basically, the categorical variable (X) I am examining has three levels, so...
6. ### Regression with Continuous and Dummy Independent Variables

Dear Colleagues, I am running a multivariate linear regression analysis but got stuck with this situation. I have one dependent variable (which is continuous) and several independent variables. Three of them are continuous and three of them are dummy variables (they have values of 1 and 0)...
7. ### linear regression without intercept with dummy variables

Hello, i run simple linear with one dummy variables and no intercept. i would like to understand the meaning of this. for example, my beta1=1.2, then if my dummy variable equal one, then y=1.2, but if my dummy variable equal zero, then y=0 ??? i know it's not right, what i should do? i know...
8. ### Logistic regression: dummy variables not significant, what next?

Hi, I'm running a logistic regression to try a predict landslides in SPSS using a categorical variable (vegetation type) with 6 possible values. In the results, the variable as a whole is significant although a couple of the dummy variables have p-values > 0.05 and thus are not significant...
9. ### In need of help with regression

Decomposing a regression coefficient - Desperate for help Hi, I apologize in advance if this is a very stupid question but I cannot for the life of me figure out how to do this. I want to regress the return of one asset onto another so as to obtain the correlation between the two, but I...
10. ### Dummies in a correlation matrix

Hi everyone, I am working on a multiple moderate regression. And just wanted to add the correlation matrix as well. Now I got the responds that I cannot state the mean and standard deviation of dummy variables. How does it work? Do I just leave the mean out and the standard deviation...
11. ### Multiple regression drops variables

Hi! I am performing a linear multiple regression analysis in spss in 3 steps. In step 1 I entered my control variables (2 interval and 4 dummy variables) using ENTER as the method. In step 2 I entered my 4 dichotomous independent variables, again using ENTER as the method. Finally, in step 3 I...
12. ### How to test for Multi-collinearity among dummy explanatory variables

Hello, Almost all the explanatory variables in my data are dummy variables and I would like to test for multi-collinearity among them. Does it make sense to still use the traditional Pearson correlation coefficients or the Variance Inflation Factor tests? If not, can you suggest what other...
13. ### Generating Dummy Variable from excel file into STATA

Hi all :) I am currently doing a research thesis titled "The Effects of Free Trade Agreements (FTA) on Indonesia's Trade". I have a panel data that consist of indonesia and its partner trade data from 1980 to 2011. In short, I have to create dummy variables of FTA that signed by Indonesia...
14. ### Help with dummy variable

Hi, I have a set of OLS-fixed effects models comprising continuous and dummy variables, with the latter used as control parameters. My models aim to evaluate the effects of loan characteristics on the interest rate levied (dependent var), which has a range between 6 and 2000 basis points. I am...
15. ### HLM vs. SPSS GLM repeated-measures

HLM 7.0 - Different p-values in HLM vs. SPSS GLM Repeated-measures My model is a 4-way interaction between 3 dichotomous dummy variables and a continuous variable, with 2 dummy variables at Level 1 (within-Ss) and 1 dummy and the continuous variable at Level 2 (between-Ss). I'm looking for...
16. ### Year dummies in Fixed Effects estimation with panel data

Quick question. I'm working with an unbalanced international dataset. I'm using fixed effects because (at least mostly because) I want to allow for unobserved country specific effects. My question is regarding using dummies for each year in my equation. Much of the literature on my subject...
17. ### test difference in marginal effects for a dummy variable, different computations

Dear Talk Stats readers, I have a Stata problem. I would like to test whether the difference between the marginal effects of a dummy varaible, obtained first by computing the difference and then by taking the derivative, is statistically significant. I want to implement this test in order...
18. ### Dummy Variables

I have a question regarding Dummy Variables.. Never been good at it.. Question is like this.. Create the dummy variable for Education Level. D1 = 1 -> if the worker is in Education Level 1 0 -> if the worker is not in Education Level 1 Create similar dummy variables for D2...
19. ### Sample size of Categorical Variables

Hi, I'm running a binary logistic model that includes categorical variables. One of my main covariates has 8 categories and some of the sample sizes within categories are small (e.g. 25 people) but this is in a total sample of 8,537 people. However when you restrict it down to the...
20. ### year fixed effects in time series regression

I'm trying to estimate what effect the tariff rate in a specific country has on evasion of tariffs (or rather the underreporting of the value of goods in customs). My dependent variable is a proxy for evasion and the explanatory one is tariffs. I have data spanning continuously over about 15...