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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Cointegration

Hi guys, 1) I have the time series model y_t = a + bx_t + e_t where y_t and x_t are I(1), and I've been asked to run an ADF test over e_t to...

• Replies: 1
• Views: 1,343
10-27-2012, 01:00 PM
2. ### Collinearity

Hi, Is there any possibility that if colinearity exists between two or more DV variables in a regression analysis, the regression analysis to be...

• Replies: 3
• Views: 6,052
01-17-2011, 08:00 AM
3. ### Collinearity

I interacted two variables from my data, and I put the newly created variable on the RHS of my model. However it automatically dropped when I ran the...

• Replies: 6
• Views: 1,639
03-05-2014, 06:36 PM
4. ### collinearity - incorrect sign?

I read from a book that the collinearity (or multicollinearity) could possibly lead the signs of the regression coefficients to being incorrect....

• Replies: 4
• Views: 3,259
04-26-2011, 02:43 AM
5. ### Collinearity = interaction ?

Hello everybody I recently learned about interaction in linear regression and I´m having a hard time grasping the concept. As i understand it...

• Replies: 0
• Views: 1,676
07-16-2013, 02:53 AM
6. ### Collinearity Among Categorical Variables in Regression

Does anyone have any knowledge and/or experience in how to measure collinearity between categorical variables that have more than 2 categories in the...

• Replies: 6
• Views: 34,928
01-25-2012, 03:52 PM
7. ### collinearity and Heteroscedasticity in bivariate probit model

Hi, all I run a bivariate probit regression, and I am not specialized in statistics and I dont know how to check collinearity and...

• Replies: 0
• Views: 5,737
10-14-2010, 03:32 PM
8. ### Collinearity and MANOVA

Hi! I've got a problem in my research. We have studied the effect of treatment on gene expression of multiple genes (11). Now we want to...

• Replies: 0
• Views: 1,427
04-05-2013, 06:15 AM
9. ### Collinearity help

I saw a suggestion on a web page for dealing with collinearity I had not seen before. http://www2.chass.ncsu.edu/garson/pa765/tacq.htm "Treat...

• Replies: 5
• Views: 5,911
06-28-2011, 07:51 AM
10. ### Collinearity in Logistic Regression

If my independent variables are correlated in Linear Regression, I can first, check it using VIF, and solve it (PLS, other ways). What do I do if...

• Replies: 8
• Views: 27,169
08-24-2010, 01:50 AM
11. ### Collinearity in multivariate regression trees.

Hi, I m new here and I am looking for help with my analysis. I have performed a multivariate regression tree using 8 variables as response and 10...

• Replies: 0
• Views: 2,282
10-24-2013, 10:42 AM
12. ### Comando para correlacion contemporanea (modelo efectos aleatorios

Buenas noches compañeros, busco un comando para el software stata 13.1, para poder estimar la correlacion contemporanea, para el modelo de efectos...

• Replies: 2
• Views: 1,676
05-26-2015, 09:14 AM
13. ### Combined or separate regressions?

Dear forumites, I have a (I guess) pretty basic question concerning multiple linear regression. My situation is the following: I have a...

• Replies: 2
• Views: 1,813
dgi
09-16-2013, 10:33 AM
14. ### Combining data from different sources

Hi, I have data from two very different sources (bird counts from ships and bird counts from the shore) which aim to estimate the same...

• Replies: 2
• Views: 1,214
08-19-2016, 01:28 PM
15. ### combining error terms for two dissimilar regressions

I have a linear regression for Y on X, and a power regression for Z on Y, each having associated error. (the Y values are different (independent) in...

• Replies: 13
• Views: 476
09-25-2017, 02:36 PM
16. ### Combining linear regressions

I have two variables, x and y, and I am using linear regression to predict y from x over a large set of subjects. There are multiple observations per...

• Replies: 0
• Views: 2,994
aix
06-01-2010, 02:48 PM
17. ### Combining Model Scores

Question for the regression modeling experts: I am looking for an efficient and correct way to combine model scores taking into account...

• Replies: 0
• Views: 4,578
03-09-2011, 04:40 PM
18. ### Combining models into single one

Yi = B0 + (B1X1,i) + (B2X2,i) + ui Yi = A1 + (A2X1,i) + (A3X2,i) + ui How to formulate these two models as one single linear model using the...

• Replies: 1
• Views: 1,366
11-26-2012, 11:05 AM
19. ### Combining multiple covariates in a linear regression model

Hi all, My question pertains to the handling of covariates in a regression analysis. Consider for example that I have three covariates (c1, c2 and...

• Replies: 0
• Views: 1,312
10-02-2012, 06:01 PM
20. ### Combining panel (10 years of data) and survey data (1 year) in one regression

Quick question regarding a problem I am having: My research explores determinants of municipal recycling behavior, evaluating the effects of...

• Replies: 0
• Views: 2,530
02-07-2013, 01:23 PM
21. ### Combining Prediction Intervals

I'm having trouble finding how to combine a number of prediction intervals. The best way to explain the problem is: Imagine a race with 4 relay...

• Replies: 4
• Views: 7,861
07-22-2010, 04:12 PM
22. ### Combining Regression and PCA scores

I work in market research, and we're often asked to run regression to determine the impact of various components (like product attributes) on overall...

• Replies: 1
• Views: 5,502
12-19-2010, 06:40 AM
23. ### Combining regression with time series

Using an existing time series of supermarket sales data I need to make a forecast. Basically a simple exponential smoothing model explains future...

• Replies: 2
• Views: 5,634
04-19-2012, 05:59 AM
24. ### Combining Regressions

Hi, I have several different regressions for various sites within an area estimating Y from X. I would like to combine all these sites in to...

• Replies: 3
• Views: 7,659
12-28-2007, 11:31 AM
25. ### Combining Seemingly Unrelated Regression Equations (SURE) with First Difference (FD)

Hey guys, I would like to estimate an equation system of 4 different equations (industry specific) across 20 countries. For various reasons Im...

• Replies: 0
• Views: 1,095
04-22-2014, 03:54 PM
26. ### Combining several regression

Sorry for this simple, maybe idiotically so, question :) I'm trying to make a very basic model for basketball, though the sport doesn't really...

• Replies: 1
• Views: 1,420
10-14-2013, 11:24 AM
27. ### Combining the effect of the linear and the Quadratic terms in Regression

Hi all, I am running a poisson regression model where I have linear term and quadratic term of time as predictors. When both are significant, can...

• Replies: 5
• Views: 2,669
06-21-2012, 11:17 AM
28. ### Combining Two Samples (one w/ intervention and one w/ out intervention)

I have a local dataset with a continuous predictor and binary outcome. I will use logistic regression to predict the binary outcome with the...

• Replies: 7
• Views: 1,671
05-02-2016, 10:01 PM
29. ### Combining variables in SPSS

I want to combine two variables that have the same level of measurement (5-point scale) in a third one to use it in my regression model, how can I do...

• Replies: 0
• Views: 3,024
11-08-2011, 09:02 AM
30. ### Combining variables prior to performing regression analysis

Hello to all. I am running a regression analysis to evaluate if the joint analysis of costs and benefits can explain medicinal plant selection better...

• Replies: 3
• Views: 1,826
05-08-2015, 05:01 PM
31. ### Common Factor Restrictions

Hello, I am currently writing my Master-Thesis and got a problem, which I have been trying to solve for the last three days. I have to conduct a...

• Replies: 0
• Views: 2,460
10-02-2012, 03:19 AM
32. ### Common method bias linear regression

I have an article for resubmission where the reviewer writes: "For example, you could test a CFA model in which you add an orthogonal method...

• Replies: 2
• Views: 2,377
10-28-2013, 07:03 AM
33. ### Common Variance as a Separate Variable

Hi all, I have a regression model exhibiting significant multicollinearity and am trying to figure out how to correct for it, or at least to minimize...

• Replies: 2
• Views: 1,569
02-09-2014, 05:16 PM
34. ### Commonality analyses/structure coefficients/relative importance

Dear members: I am conducing a 2-way moderation and I would like to determine the meaningful implications of each of my predictors (IV, Moderator,...

• Replies: 0
• Views: 782
12-17-2015, 09:34 PM
35. ### compare beta subgroup from total group - two dummy variables

My plain regression looks as follows: tendaystockreturn = alpha + beta * dummy variable that takes a value of 1 in case a director purchases...

• Replies: 1
• Views: 2,152
09-04-2014, 01:47 PM
36. ### Compare coefficients of two regression models

Hi, I have a little problem I hope someone can help me with. I run 2 multiple regression models with the same independent variables but...

• Replies: 1
• Views: 764
04-07-2016, 07:10 AM
37. ### Compare Correlation Coefficients

Hi everyone, I currently have to do an empirical work in Stata and need some help. I have a regression in this form and want to compare the...

• Replies: 0
• Views: 773
03-22-2016, 11:31 AM
38. ### Compare regression coëfficiënts in 2 models/ same sample, + 1 IV, SPSS

Dear all, I am doing a master thesis in criminology and am trying to detect confounding effects of response styles on theoretical models....

• Replies: 3
• Views: 23,547
07-30-2012, 02:45 PM
39. ### Compare regression coefficients of two settings with similar samples

Dear Statisticians, For my thesis I am currently examining whether the accounting principles have an influence on the relation between having a...

• Replies: 0
• Views: 346
06-09-2017, 03:32 AM
40. ### compare regression effects nested models

Dear forum, The following problem is puzzling me for a while. Suppose I have two nested models, where y is the same dependent variable and x1 is...

• Replies: 4
• Views: 1,860
05-29-2014, 12:50 PM
41. ### Compare slopes of multiple regression models - repeated measures at mult conditions

In an experiment I measured how hard (torque, dependent variable) subjects could push against a plate as it rotated at 4 speeds: stopped, slow,...

• Replies: 3
• Views: 2,580
08-09-2013, 12:52 PM
42. ### compare Spearman's correlations

Dear all, I performed several Spearman's correlation tests between the same independent variable and different dependent ones. All the...

• Replies: 2
• Views: 3,295
12-06-2011, 05:07 AM
43. ### Compare the estimated model with the model with intercept-only

The question is: How do the test to compare the estimated model with the model with intercept-only ? How can I comment on the result ? I think we...

• Replies: 5
• Views: 2,283
06-26-2016, 12:08 PM
44. ### comparing "pooled" coefficients between different models

Dear all, I am running a mediation model with 6 continuous predictors and 2 mediators, separately for boys and girls. I want to test if the...

• Replies: 0
• Views: 1,000
05-01-2014, 09:42 AM
45. ### Comparing 2 best fit lines for 2 halves of a data set

I have a data set with ~200 coordinates plotted on a scatter plot. I can either use the data set as is, or split this plot into two data sets along a...

• Replies: 0
• Views: 982
08-25-2014, 06:13 PM
46. ### Comparing 2 multiple regression model???

Hi im new here and to tell the truth i'm still learning about stat and struggling a little bit in my thesis so my question is what should i use is...

• Replies: 5
• Views: 1,829
01-11-2013, 09:34 AM
47. ### Comparing a multiple linear regression model across two groups

Hi everyone, I've a problem with statistic, which is driving me crazy. I hope someone finds the time to give me a hint or something :) I am...

• Replies: 0
• Views: 2,779
12-26-2012, 12:20 PM
48. ### Comparing AIC between OLS and Quantile regression

Hello all, Is it acceptable to compare the AIC of an OLS linear model to the AIC of a quantile linear model to see which is the better fit? I...

• Replies: 0
• Views: 1,036
11-26-2015, 12:10 PM
49. ### Comparing beta's of different regression analyses for significance

Hi all, I have been struggling with this for a while now, so I really hope one of you can help me out: I am trying to compare two different...

• Replies: 2
• Views: 2,049
01-30-2017, 03:42 PM
50. ### Comparing betas between two separate models

I have a linear regression model and results for 2001, and 2008. A particular predictor (unemployment rate) is significant in both models (p=0.000)....

• Replies: 1
• Views: 1,580
06-10-2012, 04:33 AM
51. ### Comparing betas with log transformation of independent variable

Hi all, I would like to compare the results of three studies. All use linear regression with continuous independent and dependent variables. The...

• Replies: 0
• Views: 1,784
03-30-2016, 06:35 AM
52. ### Comparing coefficients across sub-samples/groups with different models

I have a question in regards of comparing coefficients across sub-samples/groups. Group 1 consists of 400 observations, and Group 2 consists of 2500...

• Replies: 1
• Views: 1,136
05-15-2014, 06:11 AM
53. ### Comparing coefficients for nested logistic regressions

Hi, maybe one out there can help. I am interested in comparing the coefficients of two binary logistic models. In one nested in the other one,...

• Replies: 9
• Views: 4,457
11-24-2010, 08:45 AM
54. ### Comparing Coefficients from Different Regression Models

I'm evaluating two (2) refrigerants (gases) that were used in the same refrigeration system. I have saturated suction temperature (S), condensing...

• Replies: 0
• Views: 1,360
06-18-2014, 09:11 AM
55. ### Comparing Coefficients from Different Samples

Is it appropriate to compare regression coefficients from two different samples using a classic z-test (z= Beta1-Beta2 /SE of Difference)? In...

• Replies: 0
• Views: 2,465
12-03-2013, 02:52 PM
56. ### Comparing coefficients in Logistic Regression

Hello ! I would like to have guidance on what follows. I was fitting a Logistic Regression model, and I got the coefficients for the model's...

• Replies: 14
• Views: 9,048
06-02-2015, 09:08 AM
57. ### Comparing coefficients in Seemingly Unrelated Regressions

Hello I have a panel data set and have estimated two regression models with the same set of independent variables but different response variable. I...

• Replies: 0
• Views: 2,499
10-22-2012, 12:28 PM
58. ### Comparing coefficients on two same DV same IV models

I'm running regressions on two models using the same (8) independent and dependent variables. The dependent variable in the two models spans two...

• Replies: 3
• Views: 3,137
09-19-2013, 09:58 AM

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