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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...

    Started by jdev10‎, 04-18-2017 11:02 PM
    • Replies: 0
    • Views: 538
    04-18-2017, 11:02 PM Go to last post
  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...

    Started by BNB‎, 12-10-2012 12:41 PM
    • Replies: 2
    • Views: 1,181
    02-06-2013, 05:59 AM Go to last post
  3. Fixed Effects Regression - Dependent Variable Issue

    Hi all, I am currently running a fixed effects model in Stata, and have a question regarding how to specify my dependent variable. So I have...

    Started by Magnus MMJ‎, 07-27-2015 05:12 PM
    • Replies: 8
    • Views: 1,805
    07-31-2015, 09:22 AM Go to last post
  4. 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...

    Started by Bjoern_Soc‎, 12-05-2013 02:08 AM
    • Replies: 2
    • Views: 1,441
    12-05-2013, 05:15 AM Go to last post
  5. 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...

    Started by Salohcin‎, 07-22-2012 06:37 AM
    • Replies: 2
    • Views: 1,665
    07-22-2012, 09:28 AM Go to last post
  6. 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:...

    Started by arl139‎, 02-05-2015 09:52 PM
    dredge, glm, logistic regression
    • Replies: 2
    • Views: 6,047
    02-05-2015, 11:08 PM Go to last post
  7. 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...

    Started by Weibull‎, 08-28-2017 09:38 AM
    difference, effects, fixed, random
    • Replies: 6
    • Views: 366
    08-29-2017, 04:43 AM Go to last post
  8. 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...

    Started by noetsi‎, 05-01-2017 02:34 PM
    • Replies: 8
    • Views: 1,271
    05-02-2017, 12:04 PM Go to last post
  9. 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...

    Started by qqq‎, 06-19-2012 03:45 AM
    • Replies: 0
    • Views: 701
    06-19-2012, 03:45 AM Go to last post
  10. 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...

    Started by wutao9999‎, 04-09-2015 09:15 AM
    • Replies: 4
    • Views: 2,166
    04-09-2015, 08:10 PM Go to last post
  11. 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...

    Started by lokelyokel‎, 10-26-2016 08:09 AM
    forecast, forecast error, regression analysis, winters method
    • Replies: 1
    • Views: 2,230
    02-01-2017, 02:15 AM Go to last post
  12. 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...

    Started by VBA2010‎, 11-08-2010 05:42 AM
    • Replies: 1
    • Views: 4,447
    11-08-2010, 07:47 AM Go to last post
  13. Question 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...

    Started by sihasan‎, 10-23-2014 07:53 AM
    forecasting
    • Replies: 4
    • Views: 2,388
    10-29-2014, 08:46 AM Go to last post
  14. 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...

    Started by Masimo‎, 09-09-2016 05:52 AM
    • Replies: 0
    • Views: 1,050
    09-09-2016, 05:52 AM Go to last post
  15. Forecasting, what method to use

    I am stuck on what statistical analysis method I can use to forecast using past data. This is for a Hotel that has been open for four months, I...

    Started by Lukejames‎, 08-26-2016 07:56 AM
    • Replies: 1
    • Views: 1,237
    08-26-2016, 08:53 AM Go to last post
  16. 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...

    Started by rsk‎, 06-10-2012 03:32 PM
    interaction effects, main effects
    • Replies: 0
    • Views: 1,720
    06-10-2012, 03:32 PM Go to last post
  17. Question 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...

    Started by paluee‎, 02-03-2011 12:53 PM
    • Replies: 0
    • Views: 3,575
    02-03-2011, 12:53 PM Go to last post
  18. 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...

    Started by Bittereinder‎, 09-04-2011 03:42 AM
    • Replies: 1
    • Views: 2,858
    09-04-2011, 04:10 PM Go to last post
  19. 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...

    Started by mariamb‎, 08-22-2013 10:30 AM
    factor analysis, prediction, regression, stepwise
    • Replies: 0
    • Views: 2,295
    08-22-2013, 10:30 AM Go to last post
  20. 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...

    Started by noetsi‎, 02-22-2013 11:20 AM
    • Replies: 1
    • Views: 1,743
    02-23-2013, 10:43 PM Go to last post
  21. 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...

    Started by paul de boer‎, 09-08-2010 02:44 PM
    • Replies: 2
    • Views: 9,822
    09-14-2010, 01:33 PM Go to last post
  22. 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...

    Started by noetsi‎, 05-02-2013 11:48 AM
    • Replies: 3
    • Views: 1,963
    05-02-2013, 01:00 PM Go to last post
  23. 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...

    Started by Mase‎, 07-10-2013 06:22 AM
    • Replies: 2
    • Views: 1,205
    07-11-2013, 03:54 AM Go to last post
  24. 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...

    Started by Ted Brasil‎, 04-18-2017 04:35 PM
    • Replies: 0
    • Views: 675
    04-18-2017, 04:35 PM Go to last post
  25. 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...

    Started by sydfremmer‎, 01-26-2013 04:24 PM
    • Replies: 0
    • Views: 1,206
    01-26-2013, 04:24 PM Go to last post
  26. 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:...

    Started by Sands‎, 01-13-2012 03:21 AM
    • Replies: 0
    • Views: 1,466
    01-13-2012, 03:21 AM Go to last post
  27. 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...

    Started by rocker‎, 04-02-2013 10:00 AM
    • Replies: 2
    • Views: 2,897
    04-02-2013, 12:48 PM Go to last post
  28. 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...

    Started by DeMouraBR‎, 06-02-2011 09:45 AM
    • Replies: 13
    • Views: 8,003
    06-09-2011, 10:25 AM Go to last post
  29. 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...

    Started by GetItDone‎, 06-09-2010 03:08 PM
    • Replies: 1
    • Views: 5,275
    06-09-2010, 03:34 PM Go to last post
  30. 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...

    Started by sealguy‎, 05-07-2014 02:31 PM
    • Replies: 0
    • Views: 1,631
    05-07-2014, 02:31 PM Go to last post
  31. GEE and sample size

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

    Started by Itddoo‎, 12-07-2011 02:48 PM
    • Replies: 1
    • Views: 2,924
    12-07-2011, 03:44 PM Go to last post
  32. 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....

    Started by bbikkel‎, 01-30-2011 03:33 PM
    • Replies: 0
    • Views: 2,427
    01-30-2011, 03:33 PM Go to last post
  33. 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...

    Started by FrankD‎, 11-07-2015 08:33 AM
    • Replies: 0
    • Views: 1,606
    11-07-2015, 08:33 AM Go to last post
  34. 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...

    Started by semidevil‎, 06-13-2016 11:00 AM
    • Replies: 5
    • Views: 2,030
    06-14-2016, 07:18 AM Go to last post
  35. Question 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...

    Started by Sdruley‎, 07-11-2014 05:44 PM
    • Replies: 2
    • Views: 1,657
    07-12-2014, 04:25 AM Go to last post
  36. 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...

    Started by gibb‎, 12-01-2012 07:06 PM
    • Replies: 1
    • Views: 2,877
    12-01-2012, 07:13 PM Go to last post
  37. 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...

    Started by igsimoes‎, 12-26-2016 12:55 PM
    • Replies: 0
    • Views: 2,459
    12-26-2016, 12:55 PM Go to last post
  38. General Linear Model issues.

    Again, I hope this is in the correct sub-forum. Having had some very useful advice for my first issue, I thought I might post my second problem, this...

    Started by _Alex_‎, 11-30-2011 05:29 PM
    • Replies: 2
    • Views: 5,806
    12-01-2011, 07:32 PM Go to last post
  39. 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 =...

    Started by Conni20‎, 06-27-2015 09:14 AM
    • Replies: 1
    • Views: 1,295
    06-27-2015, 04:22 PM Go to last post
  40. 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...

    Started by will22‎, 05-17-2011 04:35 AM
    • Replies: 3
    • Views: 2,973
    05-18-2011, 09:18 PM Go to last post
  41. 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...

    Started by sqrtsqrt‎, 06-17-2013 12:40 PM
    correlation, generalised least squares
    • Replies: 0
    • Views: 860
    06-17-2013, 12:40 PM Go to last post
  42. 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%...

    Started by TheTransporter‎, 08-14-2014 10:52 PM
    • Replies: 0
    • Views: 2,182
    08-14-2014, 10:52 PM Go to last post
  43. 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...

    Started by emily.stats‎, 02-13-2014 09:40 AM
    • Replies: 0
    • Views: 1,170
    02-13-2014, 09:40 AM Go to last post
  44. 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...

    Started by FantasyCC‎, 04-05-2011 08:04 AM
    • Replies: 0
    • Views: 3,279
    04-05-2011, 08:04 AM Go to last post
  45. 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...

    Started by skan‎, 07-29-2007 01:21 PM
    • Replies: 6
    • Views: 4,097
    08-02-2007, 05:53 AM Go to last post
  46. 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...

    Started by sff.cardoso‎, 09-21-2016 02:07 PM
    anova, gls, regression analysis
    • Replies: 5
    • Views: 1,007
    09-22-2016, 01:07 PM Go to last post
  47. 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...

    Started by eric1708‎, 03-23-2015 09:00 AM
    fixed effect, glmm, random effect, terminology
    • Replies: 3
    • Views: 1,333
    03-23-2015, 09:02 PM Go to last post
  48. 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...

    Started by ernesthor‎, 06-29-2016 07:09 AM
    generalized linear model, interaction effect
    • Replies: 1
    • Views: 1,599
    06-29-2016, 07:54 AM Go to last post
  49. Question Generate a new Y-Varible (1/0 Defect/nonDefect)?

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

    Started by Stat55‎, 03-09-2017 05:38 AM
    • Replies: 0
    • Views: 902
    03-09-2017, 05:38 AM Go to last post
  50. Question 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...

    Started by bnew‎, 12-10-2014 04:52 PM
    known variables
    • Replies: 4
    • Views: 2,393
    12-15-2014, 05:56 PM Go to last post
  51. 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...

    Started by Arumairajan‎, 02-05-2013 01:19 PM
    • Replies: 2
    • Views: 1,653
    02-14-2013, 01:04 PM Go to last post
  52. 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...

    Started by fred3‎, 04-13-2016 03:55 PM
    • Replies: 0
    • Views: 1,052
    04-13-2016, 03:55 PM Go to last post
  53. 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....

    Started by Pamona D‎, 04-24-2017 09:12 PM
    ordinal logistic reg, regression analysis
    • Replies: 0
    • Views: 667
    04-24-2017, 09:12 PM Go to last post
  54. 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...

    Started by lau86‎, 02-06-2012 08:00 AM
    • Replies: 1
    • Views: 1,328
    02-07-2012, 07:28 AM Go to last post
  55. 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...

    Started by Entomo‎, 02-02-2010 05:45 AM
    • Replies: 0
    • Views: 2,749
    02-02-2010, 05:45 AM Go to last post
  56. 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"...

    Started by hlsmith‎, 09-15-2014 11:29 AM
    • Replies: 2
    • Views: 1,588
    09-15-2014, 11:57 AM Go to last post
  57. 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...

    Started by Jake‎, 10-29-2014 05:44 PM
    • Replies: 0
    • Views: 1,794
    10-29-2014, 05:44 PM Go to last post
  58. 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...

    Started by derksheng‎, 07-23-2012 12:23 PM
    • Replies: 7
    • Views: 2,799
    07-24-2012, 03:24 AM Go to last post
  59. 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...

    Started by tamsynann‎, 02-14-2014 08:27 AM
    • Replies: 5
    • Views: 1,167
    02-17-2014, 09:59 AM Go to last post
  60. 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...

    Started by AliT128‎, 04-08-2014 12:20 PM
    binary, interpret, logit, stata, variable
    • Replies: 4
    • Views: 1,334
    04-08-2014, 02:02 PM Go to last post

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