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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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: 607
    04-18-2017, 04:35 PM Go to last post
  2. High concentration at one level of multiple regression

    I am running a regression where the dependent variable is income gain. In about sixty percent of the cases the intervention fails and there is no...

    Started by noetsi‎, 04-18-2017 09:53 AM
    • Replies: 0
    • Views: 539
    04-18-2017, 09:53 AM Go to last post
  3. Derivation of an equation of Influential Analysis in OLS

    Hi to everyone, I'm new to this forum and I'm very pleased for the existence of this forum, since the fact that forums in these times are in decay....

    Started by alexjmackh_94‎, 04-16-2017 07:05 PM
    econometrics, influential outliers, ols
    • Replies: 2
    • Views: 515
    04-17-2017, 10:32 PM Go to last post
  4. Newbie Question

    Hello, Just wondering if someone could help me. I have a degree in Maths and have done second year Uni Maths stats (but quite a while ago) so...

    Started by PinkyP2‎, 04-13-2017 11:44 PM
    • Replies: 4
    • Views: 718
    04-16-2017, 11:31 PM Go to last post
  5. interpreting p-value in a table

    Hello. I am reading an article of how herbal tea affects INR values (the hypthesis is - that those who drink herbal tea have INR values outside the...

    Started by laradf‎, 04-15-2017 04:56 PM
    • Replies: 1
    • Views: 624
    04-15-2017, 10:27 PM Go to last post
  6. A question regarding simultaneous relationship and its implications on predictions

    Hey guys, I have a question regarding The simultaneous relationships and the Implications it has on regarding whether the said variable will be...

    Started by orenz10‎, 04-14-2017 08:22 AM
    • Replies: 0
    • Views: 440
    04-14-2017, 08:22 AM Go to last post
  7. Question Mediated regression (parallel): Opposing effects → how to interpret total effect?

    Hi everyone! In my student assistant job I had to to test a model of mediated regression, with various variables mediating the effect of A on B....

    Started by Jona‎, 04-13-2017 07:46 AM
    mediated regression, mediation, process tool, spss
    • Replies: 0
    • Views: 1,064
    04-13-2017, 07:46 AM Go to last post
  8. Can you include X1/X2 in a model when you've already included X1 and X2?

    Can you include X1/X2 in a model when you've already included X1 and X2? For example, I am trying to predict housing prices. X1=square feet and...

    Started by smw10c‎, 04-08-2017 12:40 PM
    • Replies: 4
    • Views: 617
    04-11-2017, 02:59 PM Go to last post
  9. Is it best to match data units to get a logical regressional relationship?

    Hi, I'm trying to find an economic relationship between inflation(CPI) and leakages to the economy like Taxes, Savings, and Imports. Well, it...

    Started by Zenny‎, 04-10-2017 09:22 PM
    inflation
    • Replies: 6
    • Views: 662
    04-11-2017, 02:20 PM Go to last post
  10. Interpret regression dummies

    Hi there :yup: So I am having troubles understanding something. I had to run a regression, taking category A as base (highest share) The...

    Started by Jazz3‎, 04-09-2017 08:49 AM
    • Replies: 3
    • Views: 539
    04-10-2017, 10:00 AM Go to last post
  11. Regression Analysis

    I was working through the following set and needed some clarity on them. I attempted these questions (with my answers below) but need help to see...

    Started by msoe414‎, 04-08-2017 03:22 AM
    regression analysis, statistics
    • Replies: 1
    • Views: 925
    04-10-2017, 09:58 AM Go to last post
  12. Quadratic formula doesn't add up (SPSS)

    Hello, SPSS will draw a quadratic fit line on a scatterplot if requested and provide the formula (see attached). I have typed out the quadratic...

    Started by HanEyeAm‎, 04-07-2017 09:28 PM
    • Replies: 9
    • Views: 1,047
    04-09-2017, 07:46 PM Go to last post
  13. Panel data regression estimatetion method

    Hi, I am facing some problems with a panel dataset, and I hope somebody could help me. I have a pretty large data set (approx. 5000 firms, 15...

    Started by RickL‎, 04-09-2017 05:53 AM
    fixed effects, panel data, panel regression, pooled ols, random effets
    • Replies: 0
    • Views: 467
    04-09-2017, 05:53 AM Go to last post
  14. Model validation in regression

    I was wondering, for this question and why. I think its in-sample but curious why. 1) Models need to be validated: a. In-sample b....

    Started by msoe414‎, 04-07-2017 03:49 PM
    • Replies: 4
    • Views: 829
    04-08-2017, 06:58 PM Go to last post
  15. backtranformation of log transformed data

    Hi forum, I've a simple question that has probably a difficult answer. In a lineair regression of the form: log(y) ~ x resulting in an...

    Started by koen‎, 07-25-2006 09:39 AM
    • Replies: 2
    • Views: 4,117
    04-08-2017, 02:58 PM Go to last post
  16. Regression with Continuous and Dummy Independent Variables

    Dear Colleagues, I am running a multivariate linear regression analysis but got stuck with this situation. I have one dependent variable (which...

    Started by tomas.bek‎, 04-03-2017 08:56 AM
    continuous variables, dummy variables, multivariate regression, ols, regression
    • Replies: 13
    • Views: 1,472
    04-05-2017, 04:07 PM Go to last post
  17. Variance of a sum of predictions

    Hi, I predict the spatial distribution of a species on a regular grid using a regression model. Species numbers vary with environmental...

    Started by mmercker‎, 03-31-2017 08:03 AM
    population size, prediction interval, spatial analysis
    • Replies: 8
    • Views: 1,273
    04-03-2017, 01:44 AM Go to last post
  18. Hypothesis interpretation

    Dear I'm wondering how I should interpret my hypotheses. The first one is "the relationship between X1 and Y increases as X3 increases" and the...

    Started by Hypnoz‎, 03-31-2017 02:03 PM
    • Replies: 4
    • Views: 781
    04-01-2017, 03:09 AM Go to last post
  19. Elasticity from linear and log-log regression model

    I am having problem understanding the calculation of elasticity. if I am using the log-log model eg: log(Y)=constant+β1 log(X1)+β2 log(X2) . So i...

    Started by korzuen‎, 03-31-2017 01:11 PM
    elasticity, log, regression
    • Replies: 3
    • Views: 1,071
    04-01-2017, 01:22 AM Go to last post
  20. Unique vs. Shared Variance Multiple Regression

    Hi all, I am having trouble with interpreting the explained variance of my multiple regression model. I ran a hierarchical model with nine...

    Started by Aegislash‎, 03-31-2017 04:43 AM
    • Replies: 1
    • Views: 1,118
    03-31-2017, 06:41 PM Go to last post
  21. How to handle a skewed dependent variable?

    Hello, i had another thread, where the scatterplot of the dependent variable and independent variable looked like the pic ('scatterplot2'). Now...

    Started by Franziska13‎, 03-30-2017 06:13 AM
    • Replies: 3
    • Views: 962
    03-31-2017, 07:42 AM Go to last post
  22. different linear regression formulas from same population

    hello to all, my question needs some explanation first; i want to test the efficiency of formulas for weight prediction but since medical...

    Started by srht ky‎, 03-29-2017 06:32 AM
    • Replies: 2
    • Views: 635
    03-30-2017, 01:46 PM Go to last post
  23. Multiple linear regression, I seek kind help for a result interpretation :)

    So, I've been struggling with a statistics problem for some time now and was wondering if you could shed some light? The regression's Dependent...

    Started by you_are_awsome‎, 03-30-2017 10:27 AM
    • Replies: 2
    • Views: 596
    03-30-2017, 10:36 AM Go to last post
  24. Reverse Engineering a calculator

    Hi A colleague in a different department posed an interesting question that I've been giving more thought to lately. Basically, a scientist here...

    Started by jamesmartinn‎, 03-30-2017 07:59 AM
    • Replies: 1
    • Views: 696
    03-30-2017, 09:41 AM Go to last post
  25. External validation of a log reg model using Nagelkerkes R2 w/ fixed parameters

    I have a dataset containing a point score (an integer between 0-41) and mortality (0/1) for a sample. I have performed a logistic regression...

    Started by ag90‎, 03-30-2017 08:05 AM
    external validation, logistic regression, nagelkerke, rsquared
    • Replies: 0
    • Views: 356
    03-30-2017, 08:05 AM Go to last post
  26. Negative Binomial Regression - Is this scatterplot okay (pic)?

    Hi there, One assumption of negative-binomial regression is linearity. I have this scatterplot of IV and DV? Would you say that there is...

    Started by Franziska13‎, 03-27-2017 08:18 AM
    • Replies: 3
    • Views: 582
    03-28-2017, 09:37 AM Go to last post
  27. % dependent and independent variables

    Hi all is a linear regression model appropriate when both the dependent and independent variables are % values of the total population in any given...

    Started by ldarley‎, 03-27-2017 01:48 PM
    • Replies: 0
    • Views: 510
    03-27-2017, 01:48 PM Go to last post
  28. Statistical proofs for experts

    Hello community. Is anyone expert enough to find the solutions to these two problems?

    Started by l2vanir‎, 03-25-2017 03:50 PM
    • Replies: 2
    • Views: 979
    03-26-2017, 11:41 AM Go to last post
  29. Heteroskedasticity

    I found heteroskedasticity in my data and I took the log for my dependent variable in SPSS. My independent variables are dummies). To be sure I...

    Started by Jazz3‎, 03-24-2017 12:30 PM
    • Replies: 7
    • Views: 1,077
    03-26-2017, 06:47 AM Go to last post
  30. SPSS is kicking out my variables [regression]

    So I am doing a multiple regression, with some independent variables. For control variables, I created dummies for the years. I have five years...

    Started by Jazz3‎, 03-21-2017 11:38 AM
    • Replies: 8
    • Views: 992
    03-24-2017, 10:59 AM Go to last post
  31. Unhappy I need help with my regression analysis for research capstone.

    Hi all, I'm new to regressions and also new to posting here. My topic is: How have E-books Affected College Textbook Prices? My hypothesis...

    Started by tlowe‎, 03-22-2017 02:59 PM
    • Replies: 9
    • Views: 1,010
    03-23-2017, 08:45 AM Go to last post
  32. What do you do it you can't increase X by one level while holding all other X constan

    Classical regression defines the slope as the change in Y for a one unit change in X holding all other X constant (or so I believe). :p What happens...

    Started by noetsi‎, 03-22-2017 12:36 PM
    • Replies: 7
    • Views: 833
    03-22-2017, 06:19 PM Go to last post
  33. Multiple regression analysis: linear or logistic?

    Hello! I have a question regarding multiple regression analysis: for numerical variable I should use linear regression and for dichotomous...

    Started by lacri‎, 03-21-2017 01:51 PM
    • Replies: 1
    • Views: 782
    03-21-2017, 04:18 PM Go to last post
  34. How to choose best robust regression model?

    Hello. There are several robust regression methods like LAR-(aka LAV-, LAD-, L1-Norm-)Regression, Quantil-Regression, M-Estimator, ... They are...

    Started by consuli‎, 02-25-2017 08:01 AM
    2 Pages
    1 2
    robust
    • Replies: 15
    • Views: 3,808
    03-21-2017, 02:05 PM Go to last post
  35. lg10 versus ln

    Hi there, I have a log transformation question. At school, we always used the ln() function in SPSS, but I recently found out that there is a...

    Started by Jazz3‎, 03-21-2017 10:13 AM
    • Replies: 3
    • Views: 1,178
    03-21-2017, 11:25 AM Go to last post
  36. Smile Panel study, multiple linear regression, assumptions

    Hey. I am doing a project where I am studying a set of companies over a 7-year period. I am doing a multiple linear regression analysis either...

    Started by monsmatglad‎, 03-21-2017 05:54 AM
    assumptions/requirements, linear, multiple regression, panel study
    • Replies: 0
    • Views: 439
    03-21-2017, 05:54 AM Go to last post
  37. log transformations

    This has confused me for years. Commonly in financial analysis you log Y or sometimes an X. I have never been sure if when you log Y you have to...

    Started by noetsi‎, 03-20-2017 02:22 PM
    • Replies: 5
    • Views: 860
    03-20-2017, 03:08 PM Go to last post
  38. Instrumental variables in system of equation

    Hi everybody, I have a simultaneous equation model in which I want to forecast long term rates in USA and Europe with Eviews. I want to use TLS to...

    Started by pgrign‎, 03-20-2017 10:12 AM
    • Replies: 0
    • Views: 479
    03-20-2017, 10:12 AM Go to last post
  39. Multiple regression analysis: multicollinearity problem

    Dear For my research I'm using interactions in a multiple regression analysis to test the influence of the IV on the DV with moderators. My...

    Started by Hypnoz‎, 03-12-2017 07:44 AM
    • Replies: 12
    • Views: 1,319
    03-19-2017, 02:14 PM Go to last post
  40. When log transformation

    Hello, I am a bit confused with WHY and WHEN you should take the log of the dependent variable and/or independent variables, after running a...

    Started by Jazz3‎, 03-14-2017 12:20 PM
    • Replies: 4
    • Views: 892
    03-17-2017, 08:23 AM Go to last post
  41. Multi-Stage models: How to do it in practice?

    Dear all, I need help with understanding the approach of so called "Multi-Stage modeling". I encountered a paper/research related to comparison of...

    Started by tradermartin‎, 03-15-2017 04:02 AM
    • Replies: 0
    • Views: 689
    03-15-2017, 04:02 AM Go to last post
  42. Relative impact of an X on Y.

    This is probably the most important question I get asked to do, and I have never found a great answer for it (of course there may not be one). If you...

    Started by noetsi‎, 03-13-2017 10:33 AM
    2 Pages
    1 2
    • Replies: 17
    • Views: 2,707
    03-14-2017, 03:32 PM Go to last post
  43. 2 or more type of categorical variable with multinomial logistic regression

    Dear sir Good evening from Japan I would like to know about usage of multinomial logistic regression In my analysis have different type of (2...

    Started by yawai‎, 03-14-2017 08:47 AM
    • Replies: 0
    • Views: 681
    03-14-2017, 08:47 AM Go to last post
  44. Exclamation How to run AIC and Logit on Panel Data?

    I've data for 10 banks over a period of last 10 years. I've financial ratios for each bank corresponding to each financial year. There are 20 such...

    Started by AbMeena‎, 03-14-2017 05:03 AM
    aic, econometrics, regression
    • Replies: 0
    • Views: 955
    03-14-2017, 05:03 AM Go to last post
  45. Multiple linear regression: What to do if I have a low Durbin-Watson value?

    I am investigating to what extent do Temperature, Rainfall, GDP per capita, Population, Livestock and Arable Land (IVs) predict Food Calories...

    Started by Miz123‎, 03-09-2017 09:41 AM
    2 Pages
    1 2
    • Replies: 15
    • Views: 2,435
    03-13-2017, 10:41 AM Go to last post
  46. Robust Regression v. Transformation of Variable (or both?)

    Hello everyone, I have a question about a regression I am running. I believe it's a pretty basic question, although after a couple hours...

    Started by kramer1788‎, 03-09-2017 11:01 PM
    heteroskedasticity, robust standard errors, transformations
    • Replies: 5
    • Views: 1,184
    03-13-2017, 10:30 AM Go to last post
  47. Moderation at some levels of moderator but not in overall model

    Hello I have three continuous variables one of which I have hypothesised to be a moderator. In the overall regression model there is no...

    Started by SBradstreet‎, 03-10-2017 06:53 AM
    moderation, process, regression analysis
    • Replies: 3
    • Views: 668
    03-10-2017, 03:04 PM Go to last post
  48. Interaction not significant but Johnson-Neyman finding significant regions

    I'm using the PROCESS macro and applying the Johnson-Neyman technique to some simple moderation analyses. I'm not quite sure what to make of some of...

    Started by syzergy‎, 03-26-2014 03:01 PM
    • Replies: 3
    • Views: 1,706
    03-10-2017, 09:11 AM Go to last post
  49. Moderated Regression Non-Signficant but Subgroup Correlation Significant??

    Hi Guys, I'm having a bit of trouble trying to figure out some of my statistics and wonder if any one has some ideas for me? I've run a moderated...

    Started by Dwest‎, 01-15-2013 07:44 AM
    moderation, moderator., regression, step-function
    • Replies: 3
    • Views: 2,480
    03-10-2017, 06:35 AM Go to last post
  50. Problems with the interpretation of a moderation analysis

    Hi there, I am undertaking a moderated regression analysis for an experiment I have conducted using SPSS 20.(With an add-on developed by Andrew...

    Started by statsman26798‎, 07-07-2013 06:33 PM
    • Replies: 1
    • Views: 1,532
    03-10-2017, 06:30 AM Go to last post
  51. 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: 775
    03-09-2017, 05:38 AM Go to last post
  52. Partial least squares (path analysis) - why and how to interpret attached results?

    For my research, I have a model with various mediators and one moderating variable (see image). I derived my data from an experiment. Short...

    Started by Ricovermeulen‎, 03-09-2017 04:30 AM
    experiment, path analysis, pls, regression
    • Replies: 0
    • Views: 702
    03-09-2017, 04:30 AM Go to last post
  53. Taking (years) into consideration Multiple regression?

    Figured it out

    Started by Jazz3‎, 03-06-2017 07:39 AM
    • Replies: 1
    • Views: 732
    03-08-2017, 03:45 PM Go to last post
  54. Why a simple linear regression (OLS)

    Hi! This forum is so helpful :tup: I just can't seem to find an answer to my question though. I am planning on doing a multiple regression...

    Started by Jazz3‎, 03-02-2017 08:08 AM
    2 Pages
    1 2
    • Replies: 18
    • Views: 3,932
    03-08-2017, 04:04 AM Go to last post
  55. What model/method to use to predict/impute missing values?

    First of all, apologies for the long and somewhat general post. I need to analyse the following tourism-related dataset and I'd appreciate any ideas...

    Started by chaps‎, 03-07-2017 05:52 AM
    • Replies: 2
    • Views: 1,098
    03-08-2017, 03:30 AM Go to last post
  56. Python PowerDivergence

    I am no statistician but I was asked to provide some quantification of the goodness-of-fit of a theory. This theory only uses one parameter and that...

    Started by ny2292000‎, 03-07-2017 11:51 AM
    goodness of fit
    • Replies: 0
    • Views: 1,036
    03-07-2017, 11:51 AM Go to last post
  57. Beta Regression Coefficients

    In a simple model, x is a continuous (normally distributed) variable predicting y. Since y values are proportions ranging from 0 to 1 (0%-100%),...

    Started by Martin Marko‎, 03-05-2017 08:16 AM
    beta-regression, logit
    • Replies: 7
    • Views: 1,353
    03-06-2017, 11:44 AM Go to last post
  58. Process Model and Covariates

    Hi all, I am having difficulty with Andrew Hayes' Process tool and my mediation model. Is it acceptable to run a mediation analysis with a...

    Started by Aegislash‎, 03-02-2017 08:48 AM
    andrew hayes, covariates, process model
    • Replies: 6
    • Views: 1,926
    03-05-2017, 02:59 PM Go to last post
  59. Non-linearity violation (predictor and log odds) in logistic regression with SAS

    Hi, I'm new to modelling and logistic regression, so I need a bit of help. I'm building a logistic regression model, and one of my continuous...

    Started by AliceMiles‎, 03-04-2017 11:38 PM
    • Replies: 2
    • Views: 1,079
    03-05-2017, 01:32 PM Go to last post
  60. The bootstrap method for medical modelling

    I am part of a team creating a model for paediatric hospitalised patients and would appreciate some help. We are looking to produce an accurate...

    Started by Lindsey‎, 02-27-2017 06:05 PM
    bootstrap, bootstrapping, model
    • Replies: 5
    • Views: 2,177
    03-04-2017, 10:01 PM Go to last post

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