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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### What is the appropriate analysis test?

Hello everyone, I'm new to this forum. Please be kind to me. ^-^ I want to know what analysis test I can use for the following: Research...

• Replies: 0
• Views: 833
04-04-2013, 02:31 PM
2. ### Nested continuous Regression conditioned on dummy

Hi, Does anyone know what model to use for the following issue: I would like to estimate transaction size (continuous dependent variable) using...

• Replies: 2
• Views: 2,164
04-03-2013, 06:19 PM
3. ### Panel Data: Conducting N time-series regressions and averaging coefficients

Hi, I stumbled upon a special regression method in a published paper (A+ journal) that I hadn't heard before. In dealing with a panel data set, the...

• Replies: 3
• Views: 3,681
04-02-2013, 10:07 PM
4. ### 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: 2,914
04-02-2013, 12:48 PM
5. ### univariate vs multivariate

Hi, I have a question about interpreting univariate vs. multivariate (linear) regression. When I'm reading journal articles often both approaches...

• Replies: 5
• Views: 40,743
04-02-2013, 05:41 AM
6. ### Variance error of estimate

Hi everyone! I need help with this question: The variance of Y is 400 and the correlation between X and Y is 0.50. a) What is the variance error...

• Replies: 0
• Views: 1,597
04-01-2013, 12:36 PM
7. ### 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,...

• Replies: 3
• Views: 4,718
03-28-2013, 08:57 PM
8. ### Event Study where event is correlated with index

Hello, I am trying to conduct an event study using the traditional market model: StockReturn = Constant + IndexReturn + DummyVariable + Error ...

• Replies: 3
• Views: 1,519
03-28-2013, 08:54 PM
9. ### Help with understanding logit coefficient

Hi everyone, I'm very new to statistics and I would very much appreciate any help you can give me in understanding the coefficients in a logit model....

• Replies: 7
• Views: 1,959
03-28-2013, 10:19 AM
10. ### Multiple regression - assumptions

Hi, I performed experiments on two plant species, growing them together in mixtures. I repeated this experiment in 4 nutrient concentrations. I...

• Replies: 9
• Views: 2,376
03-28-2013, 06:58 AM
11. ### Regression with arctan function

Hello, I am currently working on a prepayment model for mortgage loans. For this I'd like to use a modified version of the Richard & Roll model....

• Replies: 0
• Views: 3,514
03-28-2013, 05:01 AM
12. ### Alternatives to logistic regression when the number of cases is low

Hi All I got involved in my first foray into logistic regression, but have come to realize that I probably can't use it. Let me tell you about my...

• Replies: 4
• Views: 2,204
03-27-2013, 08:43 AM
13. ### step change

Fir a step change model, is it a linear model ?

• Replies: 0
• Views: 1,103
03-27-2013, 06:31 AM
14. ### Goodness of fit versus AIC/BIC versus pseudo R squares

This is geared to Logistic regression I understand in theory you use these for different reasons. AIC for comparing non-nested models and goodness...

• Replies: 6
• Views: 4,076
03-25-2013, 10:10 PM
15. ### Error question

Okay, perhaps a silly question. When it is actually appropriate to add a normal error term to an equation that you are about to estimate? Or is...

• Replies: 0
• Views: 1,251
03-25-2013, 08:45 PM
16. ### Multiple Regression with negative constant for price

Hi there, I am carrying out a project study, in which I am studying the relationship between the price of property in three regions in the UK along...

• Replies: 2
• Views: 8,412
03-25-2013, 11:11 AM
17. ### Assessing SSE(sum of squared errors)?

Hello, I can't figure out how to solve this question: Consider these summary statistics for a random sample: Mean of x=20 Mean of y=10...

• Replies: 3
• Views: 2,031
03-24-2013, 03:27 PM
18. ### IV analysis, log-linear model, is it ok?

Hi guys, I have a problem I hope someone can help me with! The thing is, I am doing an IV analysis, 2SLS. When I do the first stage and regresses...

• Replies: 0
• Views: 1,319
03-23-2013, 09:23 AM
19. ### Observed versus Expected Slope Comparison

Hello, I am performing an analysis (for dissertation project) where I am comparing the sum of branch lengths from phylogenetic trees reconstructed...

• Replies: 2
• Views: 3,580
03-22-2013, 07:57 PM
20. ### Confidence limits for logistic regression equation

I have generated a logistic model for a disease status Y (unaffected-affected) using several independent variables on a very large (600K+) dataset. I...

• Replies: 0
• Views: 3,176
03-21-2013, 11:29 PM
21. ### How to find relationship of variables?

Hi, Here is my problem: I have 3 variables with data as below: ID Went_Out_date returned?(1=yes, 0=No) 1 3/20/2012 1...

• Replies: 0
• Views: 1,187
03-20-2013, 06:47 PM
22. ### Accuracy of prediction?

Right, I've got some data for variable X and variable Y in 2002. Using Simple Linear Regression, I've made a model which uses variable X to...

• Replies: 1
• Views: 1,567
03-20-2013, 05:51 PM
23. ### Logistic regression diagnostic questions

I have a set of 42 variables which I am trying to determine the relative importance of. Well I already did but now I am trying to determine if...

• Replies: 19
• Views: 5,634
03-20-2013, 10:40 AM
24. ### Which regression model to use with skewed & ordinal data?

I'm a bit stucked and just wondering about which regression technic to use with my dependent variable at hand. Respondents were asked to provide a...

• Replies: 3
• Views: 4,267
03-19-2013, 04:16 PM
25. ### Year dummies in Fixed Effects estimation with panel data

Quick question. I'm working with an unbalanced international dataset. I'm using fixed effects because (at least mostly because) I want to allow for...

• Replies: 0
• Views: 2,608
03-19-2013, 08:40 AM
26. ### Variable is significant in OLS regression, but insignificant in Probit marginal effec

I am investigating the determinants of wage. With the dataset I ran a pooled OLS regression, and a Probit marginal effects regression looking at...

• Replies: 2
• Views: 2,875
03-18-2013, 02:31 PM
27. ### Passing-Bablok regression

Hi all, Does anyone knows how to perform Passing-Bablok regression in SAS? I have never done it do the SAS code (with or withoutan example)...

• Replies: 0
• Views: 5,061
szm
03-18-2013, 01:56 PM
28. ### basic econometrics

explain the differences for the following paired terms with appropriate examples. (1)log-lin model and lin-log model (2)cross sectional data and...

• Replies: 2
• Views: 2,524
03-18-2013, 11:11 AM
29. ### Nested or Repeated measures analysis for ecology data?

This is a refinement of an earlier question I asked. ...

• Replies: 3
• Views: 4,232
03-18-2013, 11:03 AM
30. ### Logistic regression help

Hello, I have performed some logistic regression analysis and I was wondering if someone can tell me if I've done it and interpreted it...

• Replies: 1
• Views: 1,767
03-18-2013, 09:30 AM
31. ### Help with regression please

Hi, sorry if this post is confusing, but I'll try not to babble, for my FYP I am doing a pair of questionnaires, one has a set of questions which are...

• Replies: 3
• Views: 1,449
03-18-2013, 08:29 AM
32. ### Airline Stock Regression

Hi guys, I'm trying to run a regression with daily airline stock returns as dependent variable. I've included jet fuel price and the stock market...

• Replies: 0
• Views: 1,706
03-18-2013, 08:01 AM
33. ### Hosmer Lemeshow goodness of fit test

One of the authors I consult a lot with in logistic regression is really down with Hosmer Lemeshow goodness of fit test. He argues it has low power...

• Replies: 1
• Views: 2,641
03-15-2013, 08:51 PM
34. ### bivariate regression question

Hi everyone: I am have conducted bivariate regression analysis to examine the effect of: an (x) independent variable, age (nominal) on a (y)...

• Replies: 5
• Views: 2,689
03-15-2013, 02:52 PM
35. ### Interpreting Marginal Effect - Probit

I am using a probit model, where one of the variables is log(income). I calculated the (average) marginal effect and it resulted in 0.03. I am a...

• Replies: 1
• Views: 3,114
03-15-2013, 08:08 AM
36. ### Can I transform the principal components...?

Hi all. I am using PCA to generate PCs and then using them as independent variables in regression. I added an extra data-step after PCA which is...

• Replies: 0
• Views: 1,832
szm
03-14-2013, 01:48 PM
37. ### Large logit coefficient - what it means

I am constructing a logit model with 6 explanators, trying to predict outcomes of hockey matches using odds (the variable I am referring to below)...

• Replies: 12
• Views: 8,153
03-12-2013, 06:06 PM
38. ### Comparing Multiple Regression across multiple groups

I am looking at 4 different predictors of eating disorders in 4 different groups of participants (Caucasians, Af Americans, Lations, and Asian...

• Replies: 1
• Views: 2,642
03-12-2013, 02:58 PM
39. ### Help with sensibility analysis (event ticketing and advertising influence)

Hi everybody. I have a task to find out how usage of (advertising investment, PR etc.) different media channels influence on sales of tickets for...

• Replies: 0
• Views: 2,196
03-12-2013, 12:46 PM
40. ### Longitudinal analysis across age, when participants are all different ages from T1

Hi all! I'm looking to do a longitudinal analysis to see how a variable changes across two time points. The thing is, from T1, my participants are...

• Replies: 0
• Views: 2,476
03-12-2013, 11:21 AM
41. ### regression VS canonial correlation analysis

hello i need to know the main difference between the multivariate multiple regression and canonical correlation analysis...

• Replies: 3
• Views: 2,730
03-12-2013, 04:18 AM
42. ### Multiple regression analysis for 3 groups

Hi I am doing a multiple regresion analysis for my project. If I have 3 groups which are nominal data (nationality: PL, ENG, and PL who moved to...

• Replies: 10
• Views: 3,118
03-10-2013, 05:01 PM
43. ### bivariate analysis versus univariate logistic regresssion analysis

Hello, I have done a bivariate analysis and univariate logistic regresion analysis on the same data. Now both gave the same results (OR, 95%CI),...

• Replies: 0
• Views: 2,930
03-09-2013, 03:18 PM
44. ### 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...

• Replies: 10
• Views: 4,693
03-09-2013, 10:47 AM
45. ### Multiple Linear Regression: Outlier

Ok folks, so I am doing a multiple linear regression. I am not a statistics expert by any means, and it is part of a psychology report. The last time...

• Replies: 4
• Views: 2,408
03-07-2013, 02:16 PM
46. ### Linear Probability Model

Hi guys, Just wanted to check because the text books I am using are do not explicitly state it... It does not make sense to rely on the t-stats...

• Replies: 0
• Views: 2,641
03-07-2013, 02:03 PM
47. ### Need help interpretering results

Hello, I was wondering if anyone could help me with a few small questions! First of all i'm conducting a research and I need to compare the...

• Replies: 1
• Views: 1,822
03-05-2013, 12:27 PM
48. ### Need help interpreting regression analysis comparison results

Hi, I am using simple linear regression analysis to compare two different population groups' development over time (one dependent variable). I am...

• Replies: 2
• Views: 2,559
03-04-2013, 04:23 PM
49. ### Is Unemployment Rate important as a regressor in a cross sectional analysis?

Hello, I am doing a regression on potential sales and I want to identify the demand drivers. I was wondering if Unemployment rate could be one of...

• Replies: 2
• Views: 2,424
03-01-2013, 09:08 PM
50. ### Need advice on methods to assess nested random effects ecology data

Hi everyone, I am a PhD student working in forestry/ecology. More specifically, I am looking at the effects of harvesting on soil nutrient pools....

• Replies: 1
• Views: 2,231
03-01-2013, 12:17 PM

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