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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Isolating Independent Variables

    Question 1: How do I isolate an independent variable? Question 2: Once I know the independent variables impact how do I remove it from a timeline...

    Started by rwoolley‎, 03-26-2010 02:02 PM
    • Replies: 0
    • Views: 5,024
    03-26-2010, 02:02 PM Go to last post
  2. Interactions in regression analysis

    Is their anyone who knows how to identify interactions between independent variables in a regression analysis? How does one use the output...

    Started by firefly‎, 06-08-2007 08:30 AM
    • Replies: 5
    • Views: 5,022
    06-09-2007, 09:42 PM Go to last post
  3. Fixed effects (FE) vs. Generalized Equations Estimation (GEE)

    Friends, let me quickly give you the context of my question first: I am analyzing an unbalanced panel of 200 companies across 4 years. My research...

    Started by viper430‎, 06-21-2012 05:25 PM
    • Replies: 1
    • Views: 5,008
    06-25-2012, 04:50 PM Go to last post
  4. polytomous regression - help obtaining p for heterogeneity

    I am using polytomous (aka multinomial) logistic regression to analyze some data. My outcome/dependent variable is nominal (unordered) with 4...

    Started by Stuart‎, 09-21-2010 04:23 PM
    • Replies: 1
    • Views: 5,004
    09-25-2010, 06:58 PM Go to last post
  5. 4PL Non-Linear Regression, Transforming observed y values

    Good Afternoon, I'm currently teaching my self how to fit response curves, and have run into some trouble. I currently need assistance on...

    Started by BrainExploding‎, 10-21-2013 03:34 PM
    4pl, curve fitting, log transformation, non-linear regression, response curve
    • Replies: 7
    • Views: 4,999
    10-22-2013, 12:33 PM Go to last post
  6. RegressIt: free Excel add-in for regression analysis

    Regression Analysis forum members: I'd like to announce the release of a free Excel add-in for regression and multivariate data analysis which is...

    Started by RegressIt‎, 05-30-2014 03:59 AM
    • Replies: 2
    • Views: 4,999
    12-15-2014, 06:41 PM Go to last post
  7. Linear Regression Underestimating Sales Forecast

    Guys, I want to share a flawed method i've been dealing with. I am currently using linear regression to find the coefficent of Year-over-year...

    Started by rwd5013‎, 05-27-2010 07:59 PM
    • Replies: 4
    • Views: 4,994
    05-28-2010, 07:59 AM Go to last post
  8. Exclamation Is the difference significant.

    I'm using stata since only a few weeks for my thesis. I can use some help regarding the following: I wanted to know what the mean grade is for...

    Started by Anbrhave‎, 10-28-2010 10:04 AM
    • Replies: 0
    • Views: 4,983
    10-28-2010, 10:04 AM Go to last post
  9. (OLS) How to get sample variance-covariance matrix of residuals?

    Consider the OLS: (1) y = a + b*x + e Where e is the error term. I understand that the population variance-covariance matrix for the residuals...

    Started by derksheng‎, 07-16-2012 07:00 AM
    • Replies: 6
    • Views: 4,971
    07-16-2012, 10:02 AM Go to last post
  10. Exclamation Finding standard error for elasticity (log-log model)

    Hi guys, Can anyone help with this? In(sub) = 3.43 - 0.899 In(Price) + 0.374 In(Age) + 0.141 In(Age)In(Price) + 0.229 In(Characters) The...

    Started by cuteylion‎, 11-08-2010 04:04 AM
    • Replies: 0
    • Views: 4,953
    11-08-2010, 04:04 AM Go to last post
  11. Unhappy regression results interpretation help!

    Hi everyone, this is my first post, I have this regression CSAD=a +B|R|+CSAD-1+CSAD-2+e where CSAD is the cross sectional absolute deviation of...

    Started by callput‎, 08-14-2011 08:04 AM
    • Replies: 13
    • Views: 4,943
    08-16-2011, 08:11 AM Go to last post
  12. Durbin-Watson table

    Hi.. Anyone here know how to determine whether we violated the assumption for durbin watson test... i found the table but the max sample size is...

    Started by psychology_student‎, 11-28-2011 09:17 AM
    • Replies: 3
    • Views: 4,941
    11-29-2011, 11:11 AM Go to last post
  13. Tutorial Tobit Eviews 9

    The tobit models, Also called a censored regression models (Tutorial Tobit Eviews 9) (Guide Tobit Eviews 9) (Regression Tobit Eview 9), is designed...

    Started by OlhDt_semarang‎, 12-11-2015 12:53 AM
    (tutorial tobit eviews 9, guide tobit eviews 9, regression tobit eview 9
    • Replies: 0
    • Views: 4,939
    12-11-2015, 12:53 AM Go to last post
  14. Transforming dependent variable

    I am using a multiple regression with one continuous DV and 9 IVs (mainly categorical and one continuous). My DV, as the mean score on a...

    Started by judith_sw‎, 03-19-2012 08:10 AM
    • Replies: 3
    • Views: 4,931
    03-20-2012, 07:17 AM Go to last post
  15. Multiple Linear Regression: Transformation, testing of normality, heteroscedasticity

    Hello everyone, I have a question that might be a basic one, but still I want to reassure myself that I am not on the wrong path by hearing the...

    Started by bekkiee‎, 06-27-2012 05:09 PM
    • Replies: 6
    • Views: 4,917
    06-28-2012, 09:18 AM Go to last post
  16. Which statistical test should I use?

    I am struggling with my dissertation, as having collected my data, I am unsure of which test to use. I am investigating the differences in imagery...

    Started by Rhys2175‎, 04-13-2011 08:13 AM
    • Replies: 4
    • Views: 4,912
    09-01-2011, 02:15 PM Go to last post
  17. How to deal with collinearity?

    I am wondering what methods everyone uses to deal with collinearity. I recently came across this article http://bit.ly/14wDcgH But it doesn't really...

    Started by stats4cool‎, 09-08-2013 03:40 PM
    • Replies: 5
    • Views: 4,901
    09-09-2013, 03:14 PM Go to last post
  18. Prediction Region/Set from Multiple Logistic Regression

    Hello all, I'm not sure how easy or difficult the following question actually is but for all my efforts I haven't been able to find the answer, if...

    Started by chaps‎, 05-25-2011 04:24 AM
    • Replies: 9
    • Views: 4,898
    06-11-2011, 12:54 AM Go to last post
  19. Multiple logistic Regression Power Analysis

    Hi to everybody, Please does anybody can help me to solve this problem? I have a multiple logistic regression model with more than one BINARY...

    Started by Canyon75‎, 12-20-2008 08:05 AM
    • Replies: 1
    • Views: 4,897
    12-22-2008, 09:04 AM Go to last post
  20. Linear regression on ranked data

    The dependent variable consists of a set of ranks for two types of project: Logistics and Engineering, to which I've applied a normal transformation....

    Started by ouadad‎, 03-08-2011 03:37 PM
    • Replies: 0
    • Views: 4,893
    03-08-2011, 03:37 PM Go to last post
  21. Hlm?

    I am working with a large data set, n = 1200+ average course grades culled from over 15,000 students from a school. I ran a regression using average...

    Started by ewblack‎, 12-09-2008 01:23 PM
    • Replies: 9
    • Views: 4,880
    12-17-2008, 12:21 PM Go to last post
  22. IQ/achievement test correlation (rxy)

    Working on creating new regression tables for determining the presence of learning disabilities. In order to do this, I need to determine a...

    Started by schoolpsych‎, 09-09-2011 02:09 PM
    correlation coefficients, rxy, sld
    • Replies: 1
    • Views: 4,878
    09-09-2011, 04:02 PM Go to last post
  23. Multivariate Poisson regression

    I have a linear model y=Ax where y and x are vectors and A is a matrix. The dimensionality of y is more than that of x. Further y has Poissonian...

    Started by cordovan66‎, 07-07-2010 05:07 PM
    • Replies: 2
    • Views: 4,875
    07-08-2010, 03:06 PM Go to last post
  24. Linear regression analysis - Urgent assistance required

    Hi I am trying to examine the relation between ad. liking and attitude towards the brand. My hypothesis H1: "Commercials that are liked will...

    Started by bulu‎, 10-09-2009 06:14 PM
    • Replies: 6
    • Views: 4,874
    10-11-2009, 04:10 AM Go to last post
  25. Linear Regression Model with one variable and no constant

    Hi, I've been given a problem sheet and I'd like some help as to start answering the questions, Given the model; Yi=β1Xi + ui a) show that this...

    Started by PaulDaniel‎, 12-07-2010 09:16 PM
    • Replies: 1
    • Views: 4,871
    12-07-2010, 10:15 PM Go to last post
  26. Which regression to choose ?

    Hello, I need some help fitting a linear regression model. I have one dependent variable, and 2 IV's. I need to find the best model, which is, a...

    Started by Yankel‎, 06-04-2011 01:55 AM
    • Replies: 11
    • Views: 4,868
    06-05-2011, 01:24 PM Go to last post
  27. Repeat sales regression help

    Hello everyone, I am in need of any help or guidance working on a repeat sales regression using spss. I am doing a repeat sales index on housing...

    Started by Concepts003‎, 04-05-2011 04:36 PM
    • Replies: 0
    • Views: 4,867
    04-05-2011, 04:36 PM Go to last post
  28. proof:variance

    Hi, I want to find the variance of coeffiicient b(beta) in a regression without constant term(no intercept).I am not ]with variance algebra. I...

    Started by economit‎, 04-15-2011 08:21 AM
    • Replies: 2
    • Views: 4,862
    04-15-2011, 09:27 AM Go to last post
  29. (easy) Maximum Likelihood Regression question...

    hello everyone. i am trying to get my head around a very easy example that i read somewhere explaining maximum likelihood estimation on the OLS...

    Started by will22‎, 08-27-2011 11:40 AM
    • Replies: 11
    • Views: 4,844
    08-27-2011, 02:33 PM Go to last post
  30. Performing a Pooled OLS Regression??

    I am unsure which regression method approach to use in order to portray the following information: Let us assume that for over 5 years I have...

    Started by nicholas worth‎, 08-14-2012 06:34 PM
    • Replies: 2
    • Views: 4,843
    08-27-2012, 10:57 PM Go to last post
  31. Stepwise Regression Analysis

    Under what condition (or conditions) would one observe no change in the regression coefficient for some variable (e.g., b-hat Y on X1) when another...

    Started by sask‎, 02-22-2011 12:40 PM
    • Replies: 1
    • Views: 4,822
    02-23-2011, 10:12 PM Go to last post
  32. Linear Regression for Traffic Data

    Hi there, I have a two full years of traffic data by month and I am trying to predict traffic for the next two years based on historical growth...

    Started by dramachandran‎, 10-11-2010 06:46 PM
    • Replies: 3
    • Views: 4,804
    10-13-2010, 11:25 AM Go to last post
  33. Exclamation Instrumental variable analysis

    Dear people, In my simple regression analysis are two variables endogenous. GPAi = α + βWi +βWi^2 + θSi + θSi^2 + Qiφ + εi Where Wi and Si...

    Started by Anbrhave‎, 11-23-2010 07:55 AM
    • Replies: 0
    • Views: 4,803
    11-23-2010, 07:55 AM Go to last post
  34. Solution to the elements of statistical learning by Hastie, Tibshirani and Friedman

    Hello, everyone, I am reading the book "the elements of statistical learning: data mining, inference, and prediction" authored by Hastie, Tibshirani...

    Started by t.wang21@yahoo.com.au‎, 06-02-2014 12:55 AM
    • Replies: 0
    • Views: 4,800
    06-02-2014, 12:55 AM Go to last post
  35. Comparing two linear regression gradients?

    Hi, I am completely new to linear regression so this may sound daft, but I'm wondering if its possible to test for a significant difference between...

    Started by becread95‎, 04-25-2015 08:24 AM
    • Replies: 6
    • Views: 4,796
    04-29-2015, 09:08 AM Go to last post
  36. [SOLVED] How to interpret negative regression estimate?

    Hi, Im learning about regression analysis and have negative estimates for the grade-point average variable in two categories of a multinomial...

    Started by elle-mnop‎, 02-02-2012 05:50 PM
    • Replies: 10
    • Views: 4,792
    02-03-2012, 03:10 AM Go to last post
  37. Question what is: correlation? regression? confidence?

    I need to learn statistics for a project I'm working on. I am totally lost and am spending more time than I thought I would on trying to understand...

    Started by brad henrie‎, 10-08-2009 08:38 PM
    • Replies: 1
    • Views: 4,787
    10-09-2009, 03:40 AM Go to last post
  38. Ordinary/Conditional Least Squares vs. Maximum Likelihood

    Can anyone explain in layman's terms when we should use maximum likelihood as opposed to ordinary or conditional least squares for regression or time...

    Started by krez‎, 03-26-2010 12:38 PM
    • Replies: 0
    • Views: 4,780
    03-26-2010, 12:38 PM Go to last post
  39. Linear Regression in Excel...

    Hello everyone ! If you don't mind, a question regarding linear regression in Excel. I will be having a an Intro to Statistics test in May and...

    Started by Fred‎, 02-26-2009 11:08 AM
    • Replies: 4
    • Views: 4,779
    02-26-2009, 11:57 AM Go to last post
  40. Using cross-sectional data in pooled time-series analysis

    I'm doing a pooled time-series regression analysis of GHG emissions, relative to aims in the Kyoto-protocol (annual observations 1990-2008, country...

    Started by OleMartin‎, 02-09-2011 04:22 PM
    • Replies: 2
    • Views: 4,779
    02-09-2011, 04:51 PM Go to last post
  41. Goodness-of-fit for Poisson regression

    Hello, I have a couple questions that I'd love some help with. Thanks very much for your time! I'm running a Poisson regression to look at...

    Started by kirkby‎, 07-27-2012 12:14 PM
    • Replies: 1
    • Views: 4,778
    08-01-2012, 06:22 PM Go to last post
  42. Multicollinearity in Time Series Data

    Hello all, this is my first post here -- hoping to find some helpful advice, and hope to dispense some in the future. Here is my situation: I am...

    Started by seanodlum‎, 02-05-2013 05:58 PM
    attribution, multicollinearity, regression
    • Replies: 2
    • Views: 4,770
    02-08-2013, 01:44 PM Go to last post
  43. More than 2 categorical variable+1 continuous variable as independent variable

    I am a civil engineering student and have no relation with statistics. Now I am working on my master thesis and I have got to work on SPSS now, which...

    Started by sobhit.chemmannur‎, 02-18-2013 06:03 AM
    categorical data, coefficient, regression
    • Replies: 2
    • Views: 4,756
    02-18-2013, 10:21 AM Go to last post
  44. Polynomial regression...how to solve a complex quadratic equation

    Hi, The regression in question is: y= 216.44 -109.37X + 25.969 X^2 - 1.7699 X^3 where y = strength of strand board and X = amount of glue used...

    Started by pcampin‎, 01-02-2012 01:26 PM
    • Replies: 1
    • Views: 4,755
    01-02-2012, 01:30 PM Go to last post
  45. Heteroscedasticity

    Hello, I've done a search on this but have not found any similar threads. Using EVIEWS White test I have identified heteroscedasticity in my...

    Started by Epsilon‎, 01-08-2011 02:08 PM
    • Replies: 1
    • Views: 4,750
    01-09-2011, 01:44 PM Go to last post
  46. Dummy Variables

    Is there a limit to the number of independent variables that can be dummy coded for multiple regression as well as linear regression. In other words,...

    Started by stats2013‎, 08-19-2012 09:53 PM
    2 Pages
    1 2
    • Replies: 18
    • Views: 4,743
    08-20-2012, 05:15 PM Go to last post
  47. Survey Results & Regression Analysis..Dummy Variable?

    Hello All. I have just received results back from a survey that I launched and I need help on how to analyze the results. There may be some need...

    Started by StatsGuy112233‎, 12-01-2010 11:39 PM
    • Replies: 1
    • Views: 4,739
    12-04-2010, 01:08 AM Go to last post
  48. p-value and conditional heteroskedasticity

    Hello, conditional heteroskedasticity affects the standard error coefficient (in a t-test, multiple regression), but does not affect the...

    Started by keeskkool‎, 04-02-2010 02:54 PM
    • Replies: 0
    • Views: 4,736
    04-02-2010, 02:54 PM Go to last post
  49. Non constant variance in residuals?

    Hi, When doing Linear Regression or Generalised Linear Modelling, and the residuals show non constant variance, how do you remove it? For example,...

    Started by amsbam1‎, 03-27-2013 01:28 PM
    • Replies: 3
    • Views: 4,733
    03-28-2013, 08:57 PM Go to last post
  50. Interaction significant but simple slopes not significant?

    I have run a forum search and an internet search, and tried posting this question on other forums, but have been unable to find an answer to my...

    Started by B B Jinx‎, 06-10-2015 06:01 AM
    interaction, moderation, simple slopes
    • Replies: 2
    • Views: 4,727
    06-10-2015, 09:32 AM Go to last post
  51. Vuong test

    Dear, I am trying to perform a Vuong-test to compare a Two-Step Heckman approach to a Double Hurdle approach. The paper of Humphreys...

    Started by Tiboo‎, 06-16-2012 04:46 AM
    • Replies: 0
    • Views: 4,725
    06-16-2012, 04:46 AM Go to last post
  52. Exclamation Multiple Logistic Regression: Interpreting Insignificant Variables

    I ran a multiple regression, using the following categorical dependent variables which ranked current job satisfaction: 0=not satisfied at all...

    Started by xjuhneevuhx‎, 06-01-2012 07:47 PM
    insignificant, mlogit, stata
    • Replies: 1
    • Views: 4,720
    06-03-2012, 03:47 PM Go to last post
  53. Violation of linearity assumption

    Hi, I'm a beginner at statistics. I'm doing a simple linear regression and I have a scatterplot of the residuals versus the predicted values and I...

    Started by Elodin‎, 03-07-2013 03:15 PM
    • Replies: 10
    • Views: 4,703
    03-09-2013, 10:47 AM Go to last post
  54. [SPSS - Logistic Regression] Resolve the linearity of logit assumption

    I am running a logistic regression and my income variable violates the linearity of the logit assumption. It is not negatively effecting the...

    Started by kdiallo11‎, 05-02-2015 03:37 PM
    linearity of logit, logistic regression, regression assumption
    • Replies: 3
    • Views: 4,695
    05-06-2015, 08:42 AM Go to last post
  55. Binary Logistic Regression with Multiple Data Points

    Does anybody know how to run a regression on binary outcome data, with categorical predictors, where multiple subjects each have multiple outcome...

    Started by newtostats13‎, 04-09-2010 01:03 PM
    • Replies: 1
    • Views: 4,677
    04-10-2010, 04:26 AM Go to last post
  56. Panel Data Regression using Stata/SPSS

    Please I need help. I am trying to run multiple regression analysis using SPSS and Stata but what am getting is not good at all. Can anybody help?...

    Started by Dele‎, 08-30-2011 05:56 AM
    • Replies: 0
    • Views: 4,677
    08-30-2011, 05:56 AM Go to last post
  57. Help with Regression Interpretation

    Hi - Thanks in advance for any help or advice on this! I know very little about statistics, but I have performed a multiple regression analysis in...

    Started by mchel_27‎, 03-09-2010 03:30 PM
    • Replies: 3
    • Views: 4,645
    03-11-2010, 08:57 AM Go to last post
  58. What means "1/X weighted multiple regression"

    What means 1/X weighted multiple regression? Is it just WLS with weights = "1/X" or I'm missing smth? :confused:

    Started by alex84‎, 12-11-2009 09:17 PM
    • Replies: 1
    • Views: 4,642
    12-12-2009, 01:42 PM Go to last post
  59. natural log of DV [or not?] in OLS regression? and collinearity questions for IVs

    First I want to thank anyone who responds in advance. I'm grateful for any teaching I can get. Secondly, I'm math challenged. And my stats...

    Started by xpropatroller‎, 06-28-2012 09:06 PM
    • Replies: 7
    • Views: 4,633
    07-05-2012, 10:26 PM Go to last post
  60. Negative value of the constant term..?

    Hi, My name is Roy Klaassen, currently writing my master thesis in the field of marketing management (Tilburg University, the Netherlands). My...

    Started by roybooy‎, 10-31-2011 07:28 AM
    • Replies: 2
    • Views: 4,631
    10-31-2011, 08:10 AM Go to last post

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