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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. Mixed effects modelling

Hey all, Im building a linear mixed effects model of a variable, lets say the headway time maintained by drivers in car following situations. I...

• Replies: 0
• Views: 1,470
07-24-2011, 07:12 AM
2. [Linear Regression] Regression with aggregated or separated years?

Hello to everyone! :wave: I should do some regressions but i've an important and simple question... my dataset have this structure: ...

• Replies: 4
• Views: 307
08-25-2017, 12:00 PM
3. Percentages regression

I need to do a regression analysis as part of my dissertation and am quite lost. What I want to do is to see if there is a correlation between a...

• Replies: 2
• Views: 2,190
12-11-2013, 04:06 AM
4. Changing significance level when interactions are added

Hi, I'm wondering why my significance levels go from significant, to insignificant, and back to significant again when adding interactions? ...

• Replies: 1
• Views: 2,195
04-26-2014, 11:37 AM
5. OLS-regression, relative or absolute differences?

Hi, I am quite new at this, and I am wondering if an OLS-regression shows absolute or relative differences? If anyone could tell me this and...

• Replies: 0
• Views: 1,741
05-15-2014, 09:08 AM
6. Prediction Limits

Morning everyone. First thread, so take it easy on me. I am using a holt-winters times series to predict future call and transactional volume. ...

• Replies: 0
• Views: 3,325
09-03-2008, 06:48 AM
7. Interpreting Multiple Regression vs Correlation

Hi, I'm analysing the results to a satisfaction survey. I want to work out the key drivers of satisfaction so I'm using a question relating to...

• Replies: 4
• Views: 5,136
05-28-2012, 05:58 AM
8. How to credibly downweight imputed values?

Hi All, First post here. I've googled all around trying to find an answer to my question, but I can't seem to find one, and pencil and paper isn't...

• Replies: 1
• Views: 2,549
11-17-2011, 10:38 PM
9. Partialling out covariates

Hi, I have a situation where I have Y_it = a_i + dT_it + X'_itB + e_it T is multi-valued and exogenous. It is correlated with some of the...

• Replies: 1
• Views: 3,270
12-20-2011, 05:18 PM
10. Is this an instance of simultaneity? Can you help me understand why?

I cant seem to figure this out, as standard descriptions of simultaneity in econometrics textbooks don't quite seem to fit. 1. I have panel data...

• Replies: 0
• Views: 1,641
02-24-2012, 10:45 PM
11. Logistic Regression and Multiple Regression

Hi, Please could you help me (or direct me to someone who can help me) with the following: I have a spreadsheet with a number of...

• Replies: 13
• Views: 3,870
09-07-2011, 10:17 AM
12. Likert Scale Regression Analysis

I want to perform a regression on some likert scale data. Basically its a scale which measures propensity for participative management. The rationale...

• Replies: 7
• Views: 14,181
08-13-2013, 04:09 PM
13. parametric and non parametric data

Hi I am new to stats, so maybe a silly question. Does regression analysis have assumptions of normality? Can I use regression for both normally...

• Replies: 2
• Views: 1,867
07-05-2012, 12:28 AM
14. LOGIT im Panel - Pooled, population-averaged, fixed, random?

Hey community, I run a logistic regression in panel with Stata. I'm not sure if I should use a fixed-effect, random-effect, population-averaged or...

• Replies: 2
• Views: 3,848
08-28-2012, 09:38 AM
15. Autocorrelation in nonlinear models

Good morning! I'm running a random effects logit (xtlogit with stata) and cannot find how to test for autocorrelation. Has anyone an idea? Things...

• Replies: 0
• Views: 1,504
09-11-2012, 02:12 AM
16. Regression tree significances

Hello I have some rainwater roof runoff data for 69 rain events, plus 4 possible explanatory variables. Individual regressions (linear, power,...

• Replies: 0
• Views: 1,875
12-29-2012, 11:22 AM
17. meta analysis of many regression studies

Ive searched the forum for answers to this but no joy yet so please help if you can. I have about 30 published studies looking at the dependence...

• Replies: 9
• Views: 2,808
02-25-2015, 05:31 AM
18. 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: 1,802
01-11-2013, 09:34 AM
19. Does the intercept p value matter?

Hi, I have outputs of a simple linear model as follows: y = 0.0339 + 0.27918X The p value of the intercept is 0.206 and of the slope is...

• Replies: 4
• Views: 50,611
03-28-2011, 08:14 PM
20. Non parametric equivalent to multiple regression?

Hi everyone! My sample size is only 15. Is there a nonparametric equivalent to multiple regression? I have five predictors which correlate (using...

• Replies: 2
• Views: 9,670
04-17-2010, 08:26 PM
21. Any data transformation needed for Pearson and Multiple regression?

I want to run a Pearson's r and also multiple regresssion between a DV and some IVs. The DV is measured in percentages as well as some of my IVs. The...

• Replies: 0
• Views: 2,861
04-19-2010, 01:14 PM
22. How to apply GEE and how to use it for critical mass

Hi, sorry I am completely new to the forum and as well to using GEE and SPSS so I hope my question is not to confusing. My dependent variable is...

• Replies: 0
• Views: 1,280
04-09-2014, 10:49 AM
23. Find the regression line?

Using test runs with the same automobile on a test track the following data on speed (km/hr) and mileage (km/l) were obtained. Speed (x): 48 48 64...

• Replies: 2
• Views: 2,510
04-14-2013, 10:19 PM
24. interpreting interaction results in ols regression

Dear all, I am trying to examine the association between household wealth and expenditure on education of children aged 11-17 and 5-10 in a...

• Replies: 1
• Views: 1,684
12-29-2015, 04:28 PM
25. Multiple Regression with Discrete and Continuous data in Excel

Hi, I've got lots of rows of data in Excel (around 3,500), and multiple variables. 1 of my variables is continuous (company revenues) 1 of my...

• Replies: 0
• Views: 2,569
09-09-2013, 09:19 AM
26. Constrained OLS with Moore-Pseudoinverse?

Hello, First of all - my first post here and I haven't found a way to enter formulas. So please excuse that I linked the wiki article instead. The...

• Replies: 0
• Views: 1,737
05-15-2014, 02:38 AM
27. Simultaneous Equations Model - Endogenous/Exogenous Variables

I'm having doubts about the first question, I think Qt should be exogenous as although other endogenous variables depend on it, Qt doesn't depend on...

• Replies: 0
• Views: 1,891
12-13-2012, 12:34 AM
28. Questions on Testing for Residuals

Hi, I'm new on here and I'm sorry if I posted in the wrong section. So I just went over testing of residuals for regression analysis and have a...

• Replies: 2
• Views: 1,374
12-12-2012, 11:19 AM
29. Time Series Question:Garch to forecast price/return?

Is it possible to use Garch to model price or return?or does Garch only model the volatility of price/return? Thanks

• Replies: 0
• Views: 1,584
09-29-2013, 02:20 PM
30. Model selection in logistic regression

Hello, I would like to formulate an explanatory model with logistic regression, and I want to select variables that are causal to the dichotomous...

• Replies: 1
• Views: 1,252
01-11-2013, 11:04 AM
31. Correlation with residuals of regression

Hi all, Let's say I have one DV (X) and 5 IV's, A, B, C, D and E. I'm specifically interested in the effect of E. I could perform a regression...

• Replies: 3
• Views: 2,267
11-07-2016, 10:18 AM
32. Multipel linear regression or Anova?

I am in the middle of a written exam where I have to examine a causal claim controlling for gender, age and occupation. The dependent variable is...

• Replies: 1
• Views: 1,213
06-20-2012, 02:46 PM
33. Linear regression?????

Can I still treat my regression as being linear if one of the independent variables is a dummy with 3 categories or does it become an...

• Replies: 0
• Views: 1,296
06-17-2012, 07:27 AM
34. Logistic or logit

Hello! I have a question about which model to use: logit or logistic regression. The independent variables are continuous (age, # of children),...

• Replies: 0
• Views: 1,095
06-12-2014, 05:09 PM
35. multicollinearity of interaction term in binary logistic regression

Hello, I would like to conduct a Binary Logistic Regression Analysis with a regression model containing a nominal 0/1-dummy variable (D) a...

• Replies: 2
• Views: 2,905
01-05-2015, 01:20 PM
36. 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: 2,000
01-30-2017, 03:42 PM
37. Ordinal regression vs Linear regression

Here's the situation: I have a categorical dependent variable (3 categories), and 3 continuous explanatory variables. Say I perform an ordinal...

• Replies: 0
• Views: 4,221
03-29-2011, 02:02 AM
38. Interactions cancel my main effects

I was looking at the effects of : poverty, political interest, satisfaction with democracy and political trust on political participation through...

• Replies: 5
• Views: 1,437
04-15-2014, 03:13 AM
39. How to interpret control variabele in logistic regression with interactions

Hi guys, Im doing this in binary logistic regression using SPSS. So I have some main effects in a first block: the independent variabeles :...

• Replies: 4
• Views: 1,731
05-23-2014, 12:01 AM
40. Logistic regression interactions cancel effects

So this is my model with 4 blocks. In the first my main effects Then my interactions Then my controls is this the right way to do it in logistic...

• Replies: 2
• Views: 1,523
05-24-2014, 12:12 AM
41. Explanatory variable a function of dependent variable

Hello, Does anyone know the proper terminology for the problem caused by regressing a dependent variable on a set of explanatory variables that...

• Replies: 0
• Views: 2,164
06-11-2014, 04:36 PM
42. Beta weights and correlations

Dear all, I have used regression to explain a dependent variable with a number of independent variables. I expected independent variables which...

• Replies: 0
• Views: 861
06-04-2016, 04:05 AM
43. deviance

can anybody please tell me why we need to multiply difference of likelyhoods by "-2"? Where this 2 came from, why not 3? Could not find answer

• Replies: 3
• Views: 2,170
07-29-2011, 11:24 AM
44. Information Criterion to compare different linear models

Dear Community, In order to perform a price forecast, I built four linear models:1-3 have one independent variable, 4 has two independent...

• Replies: 1
• Views: 1,121
04-05-2016, 07:25 AM
45. Displaying multiple regression

Dear stats experts - I wondering if it's possible to display a multiple regression with three predictors that are all significant on a graph. ...

• Replies: 0
• Views: 1,605
11-30-2011, 06:50 AM
46. Poisson distribution - goodness of fit

I want to test goodness of fit for poisson distribution for a very large data set (~millions of records). Can anybody suggest a method? All the...

• Replies: 1
• Views: 2,913
BGM
07-13-2011, 04:20 AM
47. how to perform autocorrelation test in panel data analysis?

anyobody knows how to perform autocorrelation test in panel data analysis? the choosen model is fixed effect model. please reply soon

• Replies: 0
• Views: 1,472
06-04-2012, 06:03 AM
48. autocorrelation test?

should i perform an autocorrelation test such as DW test to a cross-sectional data? what actually autocorrelation means for cross-sectional data?...

• Replies: 0
• Views: 1,306
06-23-2012, 02:52 AM
49. MLR equivalent for repeated measures, multiple correlated responses

I'd like to determine the best approach to determining effect sizes for a set of experimental data with multiple correlated responses. Due to...

• Replies: 0
• Views: 1,159
06-19-2014, 11:05 AM
50. Stationary data first after the 2-order/3-order difference on LN(variable)

I want to make an Linear Regression. Dependent variable: GDP Independent variables: Net exports and Debt and some control variables All variables...

• Replies: 0
• Views: 2,675
APA
10-06-2016, 08:33 AM
51. when to perform a multiple regression test

I have compared my treatment effect for the 4 variables to see which one was affected. Only one variable changed significantly pre vs. post. Can...

• Replies: 10
• Views: 2,417
07-25-2013, 05:09 PM
52. Problem interpreting Multiple Regression on Video Game Sales

Hi everyone, I am a new member, I am so glad to have found the forum. I'm tearing my hair out about this problem. These are my results: ...

• Replies: 3
• Views: 5,242
11-11-2009, 04:28 PM
53. Linear Regression and Linear Algebra

It's been years since my (intro) linear algebra course, so I'm unsure of this. If I perform a multiple linear regression that included indicator...

• Replies: 2
• Views: 1,711
12-04-2013, 10:34 PM
54. SPSS and regression - possible dummy coding?

I am struggling to run an analysis of this data. I have 3 levels of teaching methods as one independent variable, I also have a dependent outcome of...

• Replies: 1
• Views: 2,216
11-28-2012, 02:45 AM
55. help needed with two groups.

i'm sorry if this is an incredibly stupid question, this is something i've never done before. i'm doing a study which involves asking two groups the...

• Replies: 1
• Views: 1,019
06-04-2013, 08:22 PM
56. Same point of a graph? Novice needs guidance!

Dear All, I'm a BSc student currently involved in materials testing. In several of my tests I am getting a graph plotting extension(mm) vs....

• Replies: 1
• Views: 2,356
03-24-2011, 05:15 PM

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