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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### A good text on generalised linear models?

Does anyone have any good recommendations on texts on generalised linear models without matrix notation? Cheers.

• Replies: 2
• Views: 3,227
03-28-2010, 03:01 PM
2. ### Contructing an econometrics project

Hi guy. I'm doing a econometrics project and I have been given a task to find out what factors determine the male wage. I have been given a lot...

• Replies: 3
• Views: 1,919
04-06-2013, 10:01 PM
3. ### Multiple Regression Analysis Issue

Hi everyone I have just signed up! I am currently doing a thesis & struggling with my regression model. I am examining the link between profit...

• Replies: 6
• Views: 2,905
09-17-2012, 12:54 AM
4. ### testing regressions

Hi, I have a very simple question: when I run a regression what are the things that I should test for to make sure that my regression is solid....

• Replies: 1
• Views: 2,287
04-25-2011, 10:14 AM
5. ### Winsorizing when I have different size groups

I have a sample that consists of large, medium, and small firms and i want to run a separate regression for each size group. When I winsorize a...

• Replies: 0
• Views: 1,999
02-03-2017, 04:41 AM
6. ### high correlation among interaction terms

Y= alpha+ b1*x1 + b2*x2 + b3* x3 +b4*x4 + b5*dummy1*x1+b6*dummy1*x2 + b7*dummy1*x3 +b8*dummy1*x4 I run the correlation between all the regression...

• Replies: 0
• Views: 376
08-10-2017, 06:11 AM
7. ### identification with ordinal independent variable

Hi, Can you help me find the relevant literature for this problem? My regression model is: Yi=Xi*b+Ei, where Yi is income and Xi is a score, Ei...

• Replies: 1
• Views: 3,242
01-26-2011, 10:15 PM
8. ### Calculating Omega Squared

Hi All I have been battling with my stats over the last two months and have managed, by reading books and researching the web, to stumble through...

• Replies: 2
• Views: 26,817
07-28-2009, 10:25 AM
9. ### Which test to use?

I have just learned that I chose the wrong test for my data and I am now at a total loss. Basically I sent out a questionnaire which had a likert...

• Replies: 3
• Views: 2,470
08-01-2009, 02:44 AM
10. ### Regression question

I have data from 20 groups of 5 people (assigned randomly) making binary decisions within the same group for 20 times. Each period, within each group...

• Replies: 0
• Views: 1,515
10-19-2012, 08:42 PM
11. ### 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: 2,274
04-03-2013, 06:19 PM
12. ### Exclude Interaction Term and Include Fixed Effects instead

Hey everybody. I know I shouldn't exclude the terms of an interaction variable in my regression; however, If I include both terms I have the...

• Replies: 0
• Views: 2,676
05-29-2011, 08:57 AM
13. ### Linear R^2 Values as Percent Weights for Multiple Variable Formula?

Hey guys, Statistics is not my strong suit.. The closest I've been to statistics is a college level Biology II class I took three years ago.. But...

• Replies: 1
• Views: 2,842
05-10-2012, 06:12 PM
14. ### query regarding generalized linear models

hello all, I have a query regarding GZLMs. I have a variable A non-normally distributed and I also take the logA, which is normally distributed to...

• Replies: 2
• Views: 1,901
02-07-2013, 12:22 PM
15. ### [ols] what is cov(xbar, bhat)?

For a linear regression, y(i) = a + b x(i) + e(i), what is cov(xbar, bhat), ie, the covariance between the sample mean of x, xbar, and the ols...

• Replies: 1
• Views: 2,415
04-28-2014, 08:34 AM
16. ### Small question regarding linear mixed effect model

Thanks so much for reading my post. I've listed key points below. Hopefully once completing reading my problem will become clear. X is an...

• Replies: 0
• Views: 1,959
10-13-2011, 10:49 PM
17. ### Multivariate analysis, canonical correlation

Hello, I conducted an experiment with 18 subjects who participated in a simulator experiment. Each participant had to perform a task with 6...

• Replies: 0
• Views: 1,354
04-28-2016, 09:08 AM
18. ### Coefficients in linear regression

hi i am using spss 17.0 i am using linear regression to predict behaviours for the coefficent output does the constant and the indperpentant...

• Replies: 6
• Views: 3,691
07-21-2011, 03:32 PM
19. ### Field's test for linearity of the logit

Hello, I am currently working on my bachelor thesis and I ran a logistic regression on a data set I have. From Field's 'Discovery Statistics...

• Replies: 0
• Views: 1,808
05-17-2016, 07:19 AM
20. ### how to argue using wald-test/LR-test for logistic Regression

Hey there, I'm writing my thesis and I did a logistic regression in a data set. At first, it didn't come into my mind that I should argue why I'm...

• Replies: 0
• Views: 680
05-25-2016, 07:38 AM
21. ### how to interpret the interaction term in panel data?

My econometric model include an interaction term. i have some doubts in my mind. can we say that the interaction term is only the multiplication of...

• Replies: 0
• Views: 2,450
11-22-2012, 08:00 AM
22. ### Seek non-black box alternative to random forest

I've recently had a research manuscript rejected by an editor. The manuscript showed that for a real life data set, random forest outperformed...

• Replies: 1
• Views: 1,510
05-30-2017, 11:55 AM
23. ### Regression - What to do with insignificant variables?

Please pardon me if you find this question very silly but this doubt has been troubling me for some time now whenever I want to run a regression. ...

• Replies: 2
• Views: 3,115
09-02-2015, 02:30 AM
24. ### Logistic Regression

Helo I am faced with a problem which looks to be a clear case of logistic regression. A dependent variable(binary in nature) needs to be...

• Replies: 4
• Views: 2,463
06-10-2013, 12:14 PM
25. ### Dependent variable is function of itself

I have a model: qty=a.price+....(other IVs) Price is calculated as sales_amount/qty. Hence for a customer, if we aggregate data of a certain...

• Replies: 2
• Views: 1,923
02-27-2015, 08:55 PM
26. ### How to estimate quasi-elasticities from marginal effects of logistic regression?

HI everyone, I am new to this forum. I need some help regarding logistic regression analysis. I am using logistic regression for my research. I...

• Replies: 0
• Views: 1,398
08-09-2014, 07:11 AM
27. ### z-Transformation and interpretation

My independent variables are mainly measured in percentages but also Euro and Age. Do I need to do a z-transformation? And how can I interprete...

• Replies: 0
• Views: 1,251
11-28-2013, 04:59 PM
28. ### Multiple Regression Analysis - Two independent variables, one w/same values

Post closed.

• Replies: 4
• Views: 1,641
06-13-2016, 09:23 AM
29. ### 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...

• Replies: 0
• Views: 1,359
03-14-2017, 05:03 AM
30. ### Averaging x and y before fitting regression model

Hi everyone:wave::wave::wave: I have faced problem in my research when i fit a regression model my question is can i make moving average for...

• Replies: 0
• Views: 2,130
04-14-2015, 02:34 PM
31. ### Using OLS vs Probit/Logit to estimate a threshold

Suppose you're a meteorologist and want to predict whether tomorrow the temperature will exceed 20 degrees. Your boss gives you data where t is...

• Replies: 7
• Views: 4,536
07-04-2012, 04:21 PM
32. ### 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...

• Replies: 1
• Views: 1,486
02-28-2014, 12:29 AM
33. ### interpreting parameters in multivariate multiple regression

Hi all, I have a repeated measures multivariate multiple regression. All measures were sampled three times (hence, Time is the within subject...

• Replies: 0
• Views: 1,592
12-28-2012, 12:27 PM
34. ### Regression Analysis from R output

• Replies: 0
• Views: 1,172
06-17-2016, 09:50 AM
35. ### Statistical inference.

Hi there, I would like to ask a couple of basic questions: 1. What is the difference between estimation and hypothesis testing? I mean are they...

• Replies: 1
• Views: 2,792
01-09-2017, 02:01 PM
36. ### inverse transformation and reflection

Hi all, I'm doing a multiple regression analysis and my outcome variable is strongly positively skewed. Without transformation skewness = 2.10...

• Replies: 0
• Views: 2,932
04-29-2011, 05:18 AM
37. ### Least squares estimate of alpha and beta

My group have different opinions towards the following question: Find the least squares estimate of alpha and beta of the mechanistic growth...

• Replies: 1
• Views: 3,104
11-24-2016, 10:23 AM
38. ### How to develop a regression expression using factor scores?

Hi, I have four factors for fourteen variables. I want to develop a regression expression for a dependent variable using the correlated variables....

• Replies: 1
• Views: 4,301
01-23-2007, 10:05 PM
39. ### Regression with two categorical predictors and 1 control/covariate?

Hello, I'm in need of help as these analyses I describe are for my thesis so any input would be greatly appreciated. By the way, I am using IBM...

• Replies: 1
• Views: 2,490
05-14-2012, 03:04 AM
40. ### Help Non linear Growth Models - Derivates

Hi!!! im amateur in mathemathicals growth models but im doing my graduated work in adjust five differents models in some growth parameters in onion,...

• Replies: 0
• Views: 2,573
01-27-2011, 06:59 PM
41. ### Regression Analysis for comparison of crime rates across a river

I need a bit of help refining a regression comparing crime rates of counties separated by a river. My current equation looks like: ...

• Replies: 1
• Views: 1,456
11-27-2014, 10:31 PM
42. ### Moderated multiple regression and mixed factorial ANOVA

I conducted a moderated multiple regression and a mixed factorial ANOVA on the same variables and got two different results (using moderated multiple...

• Replies: 5
• Views: 7,727
08-27-2011, 03:52 PM
43. ### Mediation regression

Hi all, I have a question regarding an analysis I just ran. I ran a mediation analysis using a bootstrap approach (requiring me to look at the...

• Replies: 3
• Views: 2,194
10-04-2012, 03:54 AM
44. ### Phonetics: Interactions without one of the main effects

I am using a logistic regression model with bias reduction in order to predict the contrast between /b/ and /p/ in Ojibwe based on acoustic...

• Replies: 5
• Views: 3,807
04-23-2011, 03:32 PM

I am being asked whether certain interactions in a multiple logistic regression model with are subadditive or not. I was told to use a graph to...

• Replies: 1
• Views: 1,907
04-24-2011, 10:24 PM
46. ### Choosing test for longitudinal, repeated measures and clustered data

Hi everyone! I'm a researcher within cardiovascular medicine, currently working on a study in endocrinology (diabetes). I have the following...

• Replies: 0
• Views: 1,409
11-27-2013, 05:10 PM
47. ### Interpreting log-linear coefficients

Hi there, I am fairly new to regression and have been set the task of modelling a data set in the form ln(y) = bx1 +bx2 +bx3 +bx4 +bx5 + e. In...

• Replies: 3
• Views: 6,273
06-22-2012, 04:19 AM
48. ### SPSS - Regression - interpretation and generalizing results

Hello, Im really grateful you have taken the time to read my post. Thanks for your help. Im doing a regression analysis trying to predict...

• Replies: 2
• Views: 1,453
05-16-2016, 08:36 AM
49. ### Mallows Cp selection

I am using the best subsets method in Minitab to select the best parameters for a multiple regression, but I'm a bit confused on Mallows Cp. Some...

• Replies: 3
• Views: 17,191
04-01-2012, 02:13 PM
50. ### 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...

• Replies: 5
• Views: 2,610
03-04-2014, 01:52 PM

1.A study has been conducted to determine whether the mean spending for recreational activities during the month of August differs for residents of...

• Replies: 0
• Views: 3,952
04-23-2007, 12:20 AM
52. ### Can I combine PCA terms with real variables?

Hello, I'm new to this forum. Hopefully I am doing this right! I am trying to do a multiple regression analysis on a data set that has about 250...

• Replies: 0
• Views: 1,604
03-24-2014, 04:47 PM
53. ### Difference-in-Differences(Evaluate effect of a policy implemented gradually)

Hi I have to do a diff-in-diff estimator in order to evaluate the impact of the policy. The problem is that the policy is gradually implemented...

• Replies: 0
• Views: 1,283
04-25-2015, 07:15 PM
54. ### Binary logistic regression to analyze Likert Scale questionnaire

Hi, I am sort of stuck with the following problem concerning logistic regression analysis in my research on the determinants of technology...

• Replies: 0
• Views: 4,192
04-28-2012, 12:24 PM
55. ### Logistic regression analysis - Large beta coefficients

Hi, I have just run a logistic regression analysis on 7 IVs and a dichotomous DV. The IVs are regression-weighted composite scores of Likert scale...

• Replies: 3
• Views: 4,915
05-01-2012, 02:46 AM

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