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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Fixed effects model urgent help

So I have a dataset which I am trying to use the fixed effects model on. I am confused if I am doing it correctly. I am using panel data to...

• Replies: 0
• Views: 538
04-18-2017, 11:02 PM
2. ### Fixed Effects or Random Effects for finding determinants of expenditure

Hi! I am doing a paper on the determinants of healthcare expenditure for the elderly. I have panel data for income and expenditure for a period of 10...

• Replies: 2
• Views: 1,181
02-06-2013, 05:59 AM
3. ### Fixed effects regression and regression towards the mean

Hi, i use linear fixed effects models to analyze panel data. The dependent variable is a sum score for mental health. Independent variable are...

• Replies: 2
• Views: 1,441
12-05-2013, 05:15 AM
4. ### Fixed effects versus random effects problem

Hello everybody, I have a panel, and for simplicity lets say I want to find the correlation between x and y. Unfortunately, the x and the y for...

• Replies: 2
• Views: 1,665
07-22-2012, 09:28 AM
5. ### Fixed term is “(Intercept)” --Dredge function

Hi, i'm currently running a glm model in R and have attempted to use the following code: Model:...

• Replies: 2
• Views: 6,047
02-05-2015, 11:08 PM
6. ### Fixed vs. Random Effects

I'm wondering if someone could help me to correctly identify whether certain variables should be considered fixed or random effects. Just as...

• Replies: 6
• Views: 366
08-29-2017, 04:43 AM
7. ### follow up analysis for regression

I ran 20 services we supply to our customers. I controlled for what seemed obvious things like gender, public support, and severity of disability (we...

• Replies: 8
• Views: 1,271
05-02-2017, 12:04 PM
8. ### For the love of God please click on this and help me - REML mixed models

I am doing a behavioural masters (due in a week). Basically there are about 20 behaviours which are recorded over 15 mins (900 seconds) and these are...

• Replies: 0
• Views: 701
qqq
06-19-2012, 03:45 AM
9. ### Force a regression coefficient to be negative

I have a regression problem using variable X to predict Y. That is, Y = c + A*X + error. For the regression problem, we need that A must be...

• Replies: 4
• Views: 2,166
04-09-2015, 08:10 PM
10. ### Forecast Analysis Inquiry

Im trying to perform some time series analysis on 2015 and 2016 monthly recorded data to see what method is best for forecasting 2016 monthly values...

• Replies: 1
• Views: 2,230
02-01-2017, 02:15 AM
11. ### Forecasting assignment (Time series data)

Hi - I am new to this forum and hope to learn a thing or two from you experienced lads! I work at a companacy where we are looking into the...

• Replies: 1
• Views: 4,447
11-08-2010, 07:47 AM
12. ### Forecasting with fewer data points

Hi, Can someone provide more insights on how we can achieve forecasting with fewer data points and come up with more accurate models. I have...

• Replies: 4
• Views: 2,388
10-29-2014, 08:46 AM
13. ### Forecasting with Google Trends

Hi Guys, I try to investigate wether Google Search data can improve a forecasting model for the German housing market regarding prices and...

• Replies: 0
• Views: 1,050
09-09-2016, 05:52 AM
14. ### Formerly non-significant main effect becomes significant after interaction is entered

Hi there, I'm running a hierarchical regression with 3 IVs. First step: main effects, second step: two-ways, third step: three-ways. In the first...

• Replies: 0
• Views: 1,720
rsk
06-10-2012, 03:32 PM
15. ### Formulas for : CVRMSE and Net Mean Bias

Hi folks, I am in the energy industry, and we do linear/multilinear regressions stats. One of the concepts being introduced to supplement...

• Replies: 0
• Views: 3,575
02-03-2011, 12:53 PM
16. ### Forward selection

As most of you probably know, forward selection is a method of model selection that involves introducing independent variables into your model one by...

• Replies: 1
• Views: 2,858
09-04-2011, 04:10 PM
17. ### Forward stepwise regression procedure: application to panel data

I am in the process of evaluating the importance of some factors in predicting stock returns. In this context, I would like to implement the forward...

• Replies: 0
• Views: 2,295
08-22-2013, 10:30 AM
18. ### Four level dependent variable.

I have a four level dependent variable which is at least ordinal (its likert scale) and may be interval (that is the distance between each level may...

• Replies: 1
• Views: 1,743
02-23-2013, 10:43 PM
19. ### Four-way interaction in linear regression

Dear all, I have 4 independent variables, and I want to check their combined and interrelated effects on 1 dependent variable (thus 1 y and 4...

• Replies: 2
• Views: 9,822
09-14-2010, 01:33 PM
20. ### Fox's comments on multicollinearity (MC)

John Fox has written the most of the authors I have encountered on MC (in books and monographs on regression). I thought his comments were worth...

• Replies: 3
• Views: 1,963
05-02-2013, 01:00 PM
21. ### From B's to adjusted risk ratios - What am I missing?

Hello everyone! Usually confounder adjusted risk ratios are reported in non-experimetnal studies, but I don't know how to calculate them. The...

• Replies: 2
• Views: 1,205
07-11-2013, 03:54 AM
22. ### From time 1 to time 2

Hello, I am having a hard time to understand an issue which has been pointed out to me, though with limited further explanation. I am testing an...

• Replies: 0
• Views: 675
04-18-2017, 04:35 PM
23. ### Fundamental question related to linear regression

Hi forum users, I have a very simple question regarding regression analysis. I have n observations of independent variables "y", and n...

• Replies: 0
• Views: 1,206
01-26-2013, 04:24 PM
24. ### GARCH errors

Hey, I wonder if you couldn't point me in the right direction on this. What I'm basically trying to do is replicate the method used in this paper:...

• Replies: 0
• Views: 1,466
01-13-2012, 03:21 AM
25. ### GARCH model with insignificant arch/garch terms

Hello, I was wondering, if we run a regression where we also specify a GARCH(1,1) for the error variance, and we find that both the arch and garch...

• Replies: 2
• Views: 2,897
04-02-2013, 12:48 PM
26. ### Gauss Elimination

Hi guys. Im being asked to program Gauss Elimination in R .Im new using this kind of program. It's simple but i don't know how to start. can someone...

• Replies: 13
• Views: 8,003
06-09-2011, 10:25 AM
27. ### Gauss-Markov: Assumption no.5.

"Correlation between independent variables and the error term is 0". How do i check this (in SPSS)? I know this is basically the same as the...

• Replies: 1
• Views: 5,275
06-09-2010, 03:34 PM
28. ### GEE and number of clusters

What happens to the standard errors of the regression coefficients as the number of clusters increase in GEE? What happens to the estimated standard...

• Replies: 0
• Views: 1,631
05-07-2014, 02:31 PM
29. ### GEE and sample size

Hello, I'd like to know how to correct for small sample size in GEE.

• Replies: 1
• Views: 2,924
12-07-2011, 03:44 PM
30. ### GEE prediction interval... Help?

Ok, so I'm a bit stuck here... I used a GEE model, with 2 groups (group as factor) within each group subjects walk at two different walking speeds....

• Replies: 0
• Views: 2,427
01-30-2011, 03:33 PM
31. ### GEE: best model by comparing residuals (SPSS)

Hello there, I am doing a study on vigilance research by comparing different EEG methods (ERP, FFT and ERD) regarding their predictive power of...

• Replies: 0
• Views: 1,606
11-07-2015, 08:33 AM
32. ### General guidance on interpreting residuals and diagnostics for linear regressions

Now that I'm more comfortable with regression (in SAS) and understand the assumptions needed for linear regression, I'm able to run simple models of...

• Replies: 5
• Views: 2,030
06-14-2016, 07:18 AM
33. ### General Linear Model

My objective is to identify (F Ratio) the few independent variables in my manufacturing process that are affecting my dependent variable. My data...

• Replies: 2
• Views: 1,657
07-12-2014, 04:25 AM
34. ### general linear model - missing coefficient in R?

Hi I am trying to run a nested general linear model. I run the following model: egg volume = Perturbation + Location%in%Perturbation. I have 3...

• Replies: 1
• Views: 2,877
12-01-2012, 07:13 PM
35. ### General linear model and residuals

Hi, i'm using SPSS for analysis of my data using general linear model with 3 independet factors (2 levels each) and one independent ordinal factor (4...

• Replies: 0
• Views: 2,459
12-26-2016, 12:55 PM
36. ### general mediation question

Hi guys Probably the easiest question ever but I can't really wrap my head around it. The setup of the research is as follow: X and M =...

• Replies: 1
• Views: 1,295
06-27-2015, 04:22 PM
37. ### Generalised Least Squares VS Multilevel Modeling...

hello guys! i've been trying to wrap my head around this question for a while... if i understand things correctly, generalised least squares (GLS) is...

• Replies: 3
• Views: 2,973
05-18-2011, 09:18 PM
38. ### Generalised least squares: from regression coefficients to correlation coefficients?

Hi All, I asked this on Stack Exchange, but it seems no-one there knows the answer. I wonder if anyone on talkstats can shed some light on it. For...

• Replies: 0
• Views: 860
06-17-2013, 12:40 PM
39. ### Generalised Linear Model - with negative skewed DV

Hi All, I am trying to fit a generalised linear model to which the dependant variable is negatively skewed. The DV ranges from 0 to 150 with 45%...

• Replies: 0
• Views: 2,182
08-14-2014, 10:52 PM
40. ### Generalised linear model vs transpose data and the general linear model

Could someone please explain the difference in technical terms between a generalised linear model with the appropriate link function and applying a...

• Replies: 0
• Views: 1,170
02-13-2014, 09:40 AM
41. ### Generalized Cross Validation

Hello Guys, I'm runing MATLAB code on SVD with roughness penalties. When I use GCV to choose the parameter, I have a question regarding the...

• Replies: 0
• Views: 3,279
04-05-2011, 08:04 AM
42. ### generalized least squares

Hello. How can I modify least square linear regression method in order to fit a straight line to data with non gaussian error (such as Levy, Poisson...

• Replies: 6
• Views: 4,097
08-02-2007, 05:53 AM
43. ### Generalized Least Squares (and ANOVA type III)

Dear all, I ran a type III ANOVA on a model of this kind: gls(y~x1+x2+x3). I found that both x2 and x3 are significant. However, if I drop x3 from...

• Replies: 5
• Views: 1,007
09-22-2016, 01:07 PM
44. ### Generalized Linear Mixed Models without mixed effects. A meaningless question?

Hi there, I know what fixed and random effects in linear models or GLM are. I am using Generalized Linear Mixed Models (GLMM) to handle this. So...

• Replies: 3
• Views: 1,333
03-23-2015, 09:02 PM
45. ### Generalized Linear Model: help interpeting interaction

Hello! I apologise in advance if I missed it, but I couldn't find an answer in previous threads. I run a generalized linear model with 1...

• Replies: 1
• Views: 1,599
06-29-2016, 07:54 AM
46. ### Generate a new Y-Varible (1/0 Defect/nonDefect)?

Hello I’m currently assigned a task where I need to investigate if there is any correlation between 15 X-variables (originates from process...

• Replies: 0
• Views: 902
03-09-2017, 05:38 AM
47. ### Generate model from known independent & dependent variables. Does this make sense?

I am on a new job as a statistician, after studying stats some years ago. So please bear with me as I seek a solution to my problem. I'm trying...

• Replies: 4
• Views: 2,393
12-15-2014, 05:56 PM
48. ### Generating correlated predictors data and dependent data in r

Dear all, I need correlated both predictors data and dependent data in r. My problem is given as follows. We adopt a p=4 parameter model and...

• Replies: 2
• Views: 1,653
02-14-2013, 01:04 PM
49. ### Generating random estimates

I have 5 years worth of actual monthly data. I want to "predict" (examine really) possible values 12 months into the future. I don't want to be...

• Replies: 0
• Views: 1,052
04-13-2016, 03:55 PM
50. ### Geographically Weighted Ordinal Logistik Regression

Hello, I'm studying about Geographically Weighted Ordinal Logistik Regression. but I have trouble getting a book or reference that is related to it....

• Replies: 0
• Views: 667
04-24-2017, 09:12 PM
51. ### Geographically Weighted Regression

Hi, I am working on a project that aims to find any relationships between respiratory health with different environmental variables. I am...

• Replies: 1
• Views: 1,328
02-07-2012, 07:28 AM
52. ### Geographically weighted regression (GWR)

Hi, I am looking for some info on possibility of making a GW regression with a dependent variable as floating point numbers and independent...

• Replies: 0
• Views: 2,749
02-02-2010, 05:45 AM
53. ### Geometric Slope

I am reading a paper that in the "Methods", it is only stated multiple linear regression conducted. In the results it reports the "geometric slopes"...

• Replies: 2
• Views: 1,588
09-15-2014, 11:57 AM
54. ### Get correlation matrix of 3 variables from any combination of 3 simples/partials

Here is the situation. I am writing a program that does Cool And Interesting Things starting with a correlation matrix among 3 variables: call...

• Replies: 0
• Views: 1,794
10-29-2014, 05:44 PM
55. ### Getting F statistic from multiple t-statistics?

If I have Y = a + b1*X1 + b2*X2 + b3*X3 + error, and I have calculated sample t-statistics for b1 and b2, from this information (along with...

• Replies: 7
• Views: 2,799
07-24-2012, 03:24 AM
56. ### 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...

• Replies: 4
• Views: 1,334
04-08-2014, 02:02 PM

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