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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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...

    Started by babudabi‎, 03-08-2014 04:11 AM
    • Replies: 0
    • Views: 1,047
    03-08-2014, 04:11 AM Go to last post
  2. Latent Growth Model in AMOS: Positive path coefficients but a negative avg slope?

    Hi Everyone - I have a latent growth model with the intercept and slope predicting 7 equally-spaced measurements of a continuous variable. The model...

    Started by amberemily12‎, 03-07-2014 02:21 PM
    amos, latent growth models
    • Replies: 0
    • Views: 1,437
    03-07-2014, 02:21 PM Go to last post
  3. Linear Regression -- Output interpretation help

    Hello, I was working on a physical geography assignment and wanted to run a linear regression for the variables temperature and PE(potential...

    Started by SPSS_Rsquared‎, 03-06-2014 07:14 PM
    • Replies: 1
    • Views: 1,379
    03-07-2014, 02:55 AM Go to last post
  4. Unstandardized residual and scatterplot

    Does anyone know how to make a scatterplot using the unstandardized residuals? The exact question is this: Using the unstandardized residuals...

    Started by Sterre1992‎, 03-04-2014 09:19 AM
    • Replies: 1
    • Views: 2,812
    03-06-2014, 07:34 PM Go to last post
  5. 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...

    Started by Windows7‎, 02-26-2014 07:15 PM
    • Replies: 6
    • Views: 1,631
    03-05-2014, 06:36 PM Go to last post
  6. Robust regression and normality test

    Hi all, When running linear regression I identified certain outliers that influence the regression model, and after analyzing I decided that the...

    Started by marcosampaio‎, 02-19-2014 09:41 PM
    • Replies: 6
    • Views: 2,221
    03-04-2014, 03:28 PM Go to last post
  7. Dependent Variable and Independent Variable both range from negative to positive?

    Hi. While I have some statistical analysis experience, I usually rely on my trust multinomial logistic regression! Linear regression is out of my...

    Started by traciespiro‎, 03-04-2014 02:46 PM
    • Replies: 0
    • Views: 1,586
    03-04-2014, 02:46 PM Go to last post
  8. Lag Length for Breusch Godfrey with Cross Sectional data

    Hey guys, I am working on my master thesis and I use STATA. I have cross-sectional data with not really a time component. However I ordered my...

    Started by maxt‎, 02-20-2014 09:55 AM
    • Replies: 6
    • Views: 6,556
    03-04-2014, 01:53 PM Go to last post
  9. WHICH Test Analysis Can I use ?

    I am kindly requesting your kind advise. I am doing an analysis for collected data of experimental design using control group, but my participants in...

    Started by AdelA‎, 02-22-2014 03:24 PM
    • Replies: 5
    • Views: 2,428
    03-04-2014, 01:52 PM Go to last post
  10. Please help

    Hi everyone I am wondering if you can help me out. I am completing my PhD and have run into some problems interpreting some of the stats. I have...

    Started by Zen‎, 02-25-2014 03:28 PM
    • Replies: 7
    • Views: 1,589
    03-04-2014, 01:50 PM Go to last post
  11. Non stationary variables in panel data

    Hi, I'm building a fixed effects panel data model and it turns out that 4 of my 5 variables have a unit root. From what I understand you should...

    Started by manmoth‎, 03-03-2014 08:06 PM
    • Replies: 0
    • Views: 2,181
    03-03-2014, 08:06 PM Go to last post
  12. How to derive the r squared of an interaction term within a model

    Hi there, I am using Hayes' (2013) PROCESS macro to run a simple moderation, and I have the R-sq for the entire model. (M moderates the...

    Started by life-long learner‎, 02-28-2014 07:35 PM
    • Replies: 4
    • Views: 3,393
    03-03-2014, 03:18 PM Go to last post
  13. Mincer equation - problems with multicollinearity

    I'm trying to construct a Mincer equation for earnings, however when I run the regression, there is a problem of multicollinearity between experience...

    Started by dataset‎, 03-02-2014 03:09 PM
    • Replies: 1
    • Views: 1,677
    03-02-2014, 09:38 PM Go to last post
  14. Comparing Regression Models

    Hi, I wonder if anyone can help, I want to compare two linear regression models with each other but have no idea how to do it. I have two...

    Started by NeuroPsychABW‎, 03-02-2014 03:49 PM
    model comparison, spss
    • Replies: 1
    • Views: 2,419
    03-02-2014, 09:37 PM Go to last post
  15. Question on interpreting test statistics/regression coefficients

    When I run a regression of: logwage = height + dummy variables for each different occupation The coefficients on the dummy variables are all...

    Started by dataset‎, 02-23-2014 04:34 PM
    • Replies: 3
    • Views: 1,525
    03-01-2014, 05:18 PM Go to last post
  16. hierarchical regression

    Hi, I am trying to analyse my stats results from a three step hierarchical regression and the correlation coefficients tell me that most of my...

    Started by op2222‎, 03-01-2014 10:36 AM
    • Replies: 9
    • Views: 2,511
    03-01-2014, 12:30 PM Go to last post
  17. using control variables in a fixed effects regression.

    Hi All, I have a question about fixed effects and including control variables. Im trying to estimate the effect of large historical migration...

    Started by ttobias‎, 03-01-2014 02:56 AM
    choosing variables, regression
    • Replies: 0
    • Views: 1,625
    03-01-2014, 02:56 AM Go to last post
  18. evaluating statistical difference between model coefficients: 2 different models

    Hello, I have two logistic regression models with the same dependent and independent variables. The only difference between the 2 models is the...

    Started by MarilynCM‎, 02-26-2014 02:23 PM
    census, logistic regression, regression coefficent, statistically significant
    • Replies: 2
    • Views: 2,007
    02-28-2014, 03:29 PM Go to last post
  19. On comparisons of (standardized) regression coefficients...

    hello there. i decided to put together this as a thread and not a series of chat exchanges because i think quite a few people may be able to benefit...

    Started by spunky‎, 02-27-2014 09:45 PM
    • Replies: 8
    • Views: 2,097
    02-28-2014, 01:42 AM Go to last post
  20. Simple effects for 3-way interaction

    Hi, I'm doing a regression analysis with a continuous outcome variable (motivation), 2 continuous predictor variables (income and age), and 1...

    Started by absolutcdn‎, 02-26-2014 04:41 PM
    anova, continuous variable, dichotomous iv, linear regression, regression, simple effects
    • Replies: 1
    • Views: 1,374
    02-28-2014, 12:29 AM Go to last post
  21. Date as a Covariate

    Hi, I am looking at the effect of various weather variables on sub-population size of a certain species of snake. Sub-population size at the study...

    Started by joel‎, 02-26-2014 11:42 AM
    covariate, regression, seasonality, weather, wildlife studies
    • Replies: 3
    • Views: 2,083
    02-28-2014, 12:01 AM Go to last post
  22. Logistic Regression Interpretation

    Hi everyone. I was wondering how I can interpret the results...especially the odds ratio (ExpB). The predictor (independent variable) is...

    Started by gene2420‎, 02-26-2014 06:44 PM
    • Replies: 6
    • Views: 1,584
    02-27-2014, 02:25 PM Go to last post
  23. Grouping educational level in different variables

    hi there! I'm trying to apply a regression model based on the Human Capital Theory. Besides other independent variables, I have grouped the...

    Started by FŽanor‎, 02-25-2014 01:51 PM
    education, educational level, human capital theory, regression, variables
    • Replies: 6
    • Views: 1,753
    02-25-2014, 04:06 PM Go to last post
  24. Why X1 nor X2 is insignificant but together [X1, X2] are significant in a regression

    Hi, I run 2 similar linear regressions on election vote shares as the dependent variable : Regression 1 with X1 as the key explanatory...

    Started by wand‎, 02-24-2014 09:35 PM
    • Replies: 2
    • Views: 2,474
    02-25-2014, 02:03 PM Go to last post
  25. Please Help. Manova, study on the relationship between ideals and sexual partners

    Im doing a study on the effect of pornography exposure, sexual preoccupation and attitudes toward erotica have on the relationship between ideals and...

    Started by mawhinney22‎, 02-25-2014 11:26 AM
    • Replies: 0
    • Views: 1,071
    02-25-2014, 11:26 AM Go to last post
  26. Panel data: test for heterogenous coefficients

    Hi, I have a panel with N=19 regions and T=25 years and run a pooled OLS with 6 regressors. My hypothesis is that the effect from some of the...

    Started by ladf‎, 02-25-2014 07:24 AM
    • Replies: 0
    • Views: 1,313
    02-25-2014, 07:24 AM Go to last post
  27. Backward Binary logistic regression: effect of the "indicator" value (first vs. last)

    I have performed a backward binary logistic regression in SPSS (20). The dependent variable is nominal, and there are 5 explanatroy variables, of...

    Started by fruppel‎, 02-25-2014 06:17 AM
    backward, binary logical regression, indactor, spss
    • Replies: 0
    • Views: 1,649
    02-25-2014, 06:17 AM Go to last post
  28. goodness of fit - with a twist!

    I have a study with 300 subjects. Each subject has completed a cardio pulmonary test (CPET). Therefore, I have 300 datasets that each contain 1...

    Started by rileynic‎, 02-21-2014 09:36 PM
    • Replies: 1
    • Views: 1,216
    02-24-2014, 09:06 AM Go to last post
  29. Interpreting Panel data analysis

    Hi there, This is my first statistical question on this forum. I am busy with my thesis, so I think a couple more will follow in the coming...

    Started by daang90‎, 02-23-2014 01:44 PM
    • Replies: 1
    • Views: 2,057
    02-24-2014, 04:47 AM Go to last post
  30. Polynomial regression: how to plot several regression lines on same graph.

    Hi there, I am currently working on my thesis which is concerned with abnormality of differences between index scores on an intelligence test. An...

    Started by Pelican23‎, 02-22-2014 12:27 PM
    plots, [r]
    • Replies: 3
    • Views: 2,407
    02-24-2014, 03:31 AM Go to last post
  31. Understanding Multilevel Model

    I'm slowly working through multilevel models and have a pretty specific question/though checking. Here's some R code: library(lme4);...

    Started by trinker‎, 02-17-2014 11:18 PM
    4 Pages
    1 2 3 ... 4
    multilevel model
    • Replies: 47
    • Views: 9,388
    02-23-2014, 11:48 PM Go to last post
  32. intraclass correlation as a proportion of variance (chatbox convo)

    02/23 15:25 trinker: See if this reason sounds good... 02/23 15:26 trinker: If we have an ICC of .086 then 8.6% variability in the oucome is...

    Started by Jake‎, 02-23-2014 07:01 PM
    • Replies: 0
    • Views: 2,341
    02-23-2014, 07:01 PM Go to last post
  33. Conditional Regression Analysis in SPSS

    Hi all, Iím trying to do a matched paired analysis on some data. I have two groups of children, matched by age and sex. Each pair has been given a...

    Started by tommecrow‎, 02-23-2014 03:37 AM
    • Replies: 1
    • Views: 4,197
    02-23-2014, 04:09 PM Go to last post
  34. Advice on Regression Model Using PROC GLM in SAS

    Hi Everyone, thanks for your insight on this. I will try to explain my data set as well as possible. One of the models I am running on my data...

    Started by becca05meg‎, 02-21-2014 08:39 PM
    model, multiple regression, proc glm
    • Replies: 0
    • Views: 1,067
    02-21-2014, 08:39 PM Go to last post
  35. Length between parameters in Multiple regression

    In multiple regression we know that as an estimate of β and this gives the minimum sum of squares of the residuals: And we know that

    Started by M!ss Moon‎, 02-21-2014 10:58 AM
    least squares, multicollinearity, multiple regression
    • Replies: 2
    • Views: 1,447
    02-21-2014, 02:56 PM Go to last post
  36. LSDV dropping states/variables?

    So I am running a Least Squares Dummy Variable Regression (LSDV1) involving data from 21 states observed 3 times (2007, 2008, 2009) and dropping one...

    Started by cynicalflyer‎, 02-21-2014 12:34 PM
    • Replies: 1
    • Views: 1,249
    02-21-2014, 01:49 PM Go to last post
  37. Logistic regression. How to combine classes in a mullticategorical variable?

    Hi, Iím preparing some data with a view to carry out a multivariable logistic regression. The dependent variable is LANDSLIDES, i.e....

    Started by mattdoughty‎, 02-21-2014 08:58 AM
    • Replies: 5
    • Views: 3,807
    02-21-2014, 11:45 AM Go to last post
  38. cox model with time dependent covariate

    I am trying to fit a cox model: h(t, beta) = h0(t)exp(X*beta), while X = (x1, x2, ..., xN) but, for instance, x1 is binary with value of 0 or 1,...

    Started by pepsico007‎, 02-20-2014 08:07 PM
    cox, hazard, model, survival analysis
    • Replies: 1
    • Views: 1,690
    02-20-2014, 11:37 PM Go to last post
  39. F-test easy doubt

    We have an equation with autocorrelation and we corrected it using Cochrane Orcutt. Now, we are doing a F-test dropping some variables and we don't...

    Started by JesusL‎, 02-20-2014 12:47 PM
    • Replies: 0
    • Views: 947
    02-20-2014, 12:47 PM Go to last post
  40. Comparing coefficients from two separate regressions

    I have done my best to do an extensive literature review to answer this question, but I've frustratingly found nothing. So I would appreciate any...

    Started by dlh8‎, 02-09-2014 08:35 PM
    3 Pages
    1 2 3
    • Replies: 33
    • Views: 6,404
    02-18-2014, 03:01 PM Go to last post
  41. Performance Comparison, Using Regression, Between 2 Data Sets

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

    Started by gth826a‎, 02-18-2014 02:23 PM
    • Replies: 0
    • Views: 1,225
    02-18-2014, 02:23 PM Go to last post
  42. Predicting the rank of a candidate on a party list - Help requested

    Dear all, My name is Madeline, I am doing research on party list rankings for open list PR elections (where votes are cast on a single...

    Started by Madeline‎, 02-18-2014 09:42 AM
    • Replies: 0
    • Views: 995
    02-18-2014, 09:42 AM Go to last post
  43. Conditional change ordered logistic with different approach of same variable

    LS, I am working with two-wave panel data looking at outcomes of retirement on self-rated health (5 point scale, very good to very bad)). It is...

    Started by Levi‎, 02-18-2014 08:38 AM
    conditional regression, dummy, interval, ordered logit
    • Replies: 0
    • Views: 918
    02-18-2014, 08:38 AM Go to last post
  44. Question "common" residual SS

    In an effort to understand the ANCOVA analysis on the following link, I have reconstructed the sheet in fig 16.3 ...

    Started by sunnee1‎, 02-17-2014 02:15 PM
    • Replies: 1
    • Views: 1,216
    02-17-2014, 08:08 PM Go to last post
  45. 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: 1,179
    02-17-2014, 09:59 AM Go to last post
  46. [SOLVED] How is simple nested not blocked

    I'm reading the optimal design manual and it says on p. 8: How can a nested design (I'm thinking students in classrooms) not have blocking? I...

    Started by trinker‎, 02-17-2014 12:50 AM
    blocking, nesting, optimal design
    • Replies: 2
    • Views: 1,083
    02-17-2014, 09:49 AM Go to last post
  47. How to calculate Covariance Matrix for the Excel

    Hi, Hope someone can help me to solve the question of Covariance Matrix for 15 x 15 Q1 Q2 Q1 1 Q2 1 Thank you.

    Started by albert_teo77‎, 02-16-2014 09:12 AM
    • Replies: 0
    • Views: 1,214
    02-16-2014, 09:12 AM Go to last post
  48. Panel data time trend

    Hi, I'm building a panel data model for a university paper I'm writing. Unfortunately I'm a bit of an amateur with panel data analysis and would...

    Started by manmoth‎, 02-15-2014 05:28 PM
    • Replies: 0
    • Views: 1,842
    02-15-2014, 05:28 PM Go to last post
  49. Question about sorting data so I can run regressions

    I have two data sets that I combined using the 'append' command in Stata. Each data set has about 8,500 observations - essentially people who agreed...

    Started by dataset‎, 02-15-2014 04:15 PM
    • Replies: 1
    • Views: 1,327
    02-15-2014, 05:00 PM Go to last post
  50. Is it appropriate to include intermediate outcomes in a predictive model?

    It is quite clear that one should not control for post-treatment variables / intermediate outcomes when the goal is causal inference, but I wasn't...

    Started by inspekt1‎, 02-15-2014 04:41 PM
    mediation, modeling, prediction, regression
    • Replies: 0
    • Views: 1,158
    02-15-2014, 04:41 PM Go to last post
  51. Statistically significant differents in R-sq

    Hi: I have two variables that I am considering as predictors of a third depdent varible. Both are very good. Taken along one has an R-sq of...

    Started by quigleym‎, 02-15-2014 01:11 PM
    • Replies: 0
    • Views: 996
    02-15-2014, 01:11 PM Go to last post
  52. Averaging LASSO coefficients for repeated random partitioning of data

    Is it reasonable to average LASSO coefficients from repeated reshuffling of training/test sets? Suppose I randomly divide my data into testing &...

    Started by raco‎, 02-14-2014 05:33 PM
    lasso, regression coefficients, regularized
    • Replies: 0
    • Views: 1,315
    02-14-2014, 05:33 PM Go to last post
  53. how to improve Arellano-Bond test for AR(2) in first differences in system GMM?

    Hello, I am estimating my regression using system GMM. xtabond2 y L.y x1 x2 x3 yr2004-yr2011 z, gmm(y, lag(2 .) ) iv(x3 yr2004-yr2011,...

    Started by boldmiga‎, 02-13-2014 10:38 AM
    arellano-bond test, gmm, system gmm, xtabond2
    • Replies: 1
    • Views: 6,719
    02-13-2014, 11:18 AM Go to last post
  54. Developing a function/algorithm to solve for voltage drift

    Hey guys, So in one of my classes we are studying composite materials. We did an experiment where a piece of composite material was anchored at...

    Started by benanderson08‎, 02-13-2014 10:04 AM
    • Replies: 0
    • Views: 1,063
    02-13-2014, 10:04 AM Go to last post
  55. 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: 1,174
    02-13-2014, 09:40 AM Go to last post
  56. How to correct for higher orders of autocorrelation?

    Hello. I have a quarterly time series model with consumption as the dependent variable and seasonal dummies and a few relevant variables as...

    Started by TCAC‎, 02-10-2014 01:08 PM
    • Replies: 3
    • Views: 2,455
    02-12-2014, 12:28 PM Go to last post
  57. Why are two t-values identical?

    I have the following regression problem: The time series YA and YB are both regressed on X1 and an intercept term of ones. eA1 and eB1 are the...

    Started by Sander‎, 02-12-2014 02:27 AM
    linear regression;
    • Replies: 0
    • Views: 964
    02-12-2014, 02:27 AM Go to last post
  58. Is it possible to model paths from X to Y and X to Eta in an SEM model?

    Hi, I'm trying to build an SEM model in LISREL with, among other variables/paths, a path from an exogenous manifest variable X (TV Ads) to an...

    Started by hereiamat‎, 02-11-2014 05:30 AM
    • Replies: 0
    • Views: 791
    02-11-2014, 05:30 AM Go to last post
  59. Linear regression model issues

    Hi, I am relatively new to using multiple linear regression model and hoping someone can point me in the right direction. 1. I am trying to...

    Started by kools‎, 02-10-2014 04:06 PM
    • Replies: 3
    • Views: 1,425
    02-10-2014, 07:07 PM Go to last post
  60. Multiple regression returning strange output?

    Hi, Trying to run a multiple regression. The dependent variable is cost of life insurance. The independent variables are age and face amount. ...

    Started by francoisd‎, 02-04-2014 09:07 PM
    • Replies: 8
    • Views: 1,829
    02-10-2014, 04:40 PM Go to last post

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