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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Confusing results after introduction of an interaction effect

Found answers to my question. You can delete this topic.

• Replies: 0
• Views: 1,169
10-06-2013, 11:24 PM
2. ### Sample size sensitivity in time series regression analysis

I have a time series that I've built a regression on, say Y = X + Y. For a data set of size 300, the coefficients of X and Y are statistically...

• Replies: 2
• Views: 1,804
10-03-2013, 07:34 PM
3. ### All my coefficients are statistically significant

Hi All, I am running a fixed effects model in stata, but all my independent variables are statistically significant. I am wondering if I am doing...

• Replies: 18
• Views: 5,660
10-03-2013, 06:21 PM
4. ### Factor analysis vs logistic regression

Factor analysis and logistic regression are methods which i have never used before. I really did not need to use them, well until now. My knowledge...

• Replies: 2
• Views: 3,714
10-03-2013, 02:24 PM
5. ### Independent variable not Really Independent?

Please forgive my ignorance in advance. I have "dependent variables"- the price paid for a business as a multiple of revenues (e.g. the business...

• Replies: 3
• Views: 1,928
10-03-2013, 01:21 PM
6. ### Regression analysis guy wannabe

I'm a math guy that's been out of school for 20 years in a non-math career. I'm interested in learning regression analysis, and I'd like to know how...

• Replies: 10
• Views: 2,003
10-03-2013, 12:11 PM
7. ### standardized residuals

hi is it possible to do (standardized residuals) in SPSS for detecting outliers more than one time.

• Replies: 3
• Views: 1,921
10-03-2013, 10:33 AM
8. ### Likelihood function for multiple linear regression with a covariate

Hello, I'm trying to adapt a script that was written in SAS into R, and I've run into a problem that isn't so much related to the different...

• Replies: 3
• Views: 1,497
10-02-2013, 12:10 PM
9. ### Linear Regression and Box-Cox transformation

Hi, I have a model which predicts the number of defects in a class which takes into account few standard independent variables like CK metrics....

• Replies: 0
• Views: 1,826
10-02-2013, 08:46 AM
10. ### Logistic Regression - order of inclusion

Hi I'm working on a logistic regression using R. My outcome is Survived/Died and I have 16 predictors consisting of numerical and categorical...

• Replies: 2
• Views: 2,011
10-02-2013, 01:49 AM
11. ### OLS question

I'm asked to write the OLS criterion function for the model P = mu +Ui Pi = price of the ith item in question, mu = population average and Ui...

• Replies: 3
• Views: 2,111
BGM
10-02-2013, 01:19 AM
12. ### how to estimate B1 by OLS

I am asked to 'estimate B1 by OLS' and told that the variance of u wrt x is a constant (sigma^2) times Xi^2 and that the covariances between all the...

• Replies: 0
• Views: 2,677
10-01-2013, 01:22 PM
13. ### What econometric method for macroeconomic trade data?

Hello, I am working with a data set with trade data of one specific good of 173 countries from 1990 to 2010 in STATA. For every year and a pair of...

• Replies: 3
• Views: 2,986
10-01-2013, 08:57 AM
14. ### Classification with high positive predictive value

I have a two-class classification problem. I would like to train a multivariate classifier with 100% positive predictive value. In other words, I...

• Replies: 3
• Views: 1,909
09-30-2013, 11:51 AM
15. ### Log-Normal vs. Student t-distributed Errors - exponential, logarithmic transformation

Hello All, I'm supporting a client who is attempting to fit a line to a set of 5 (X,Y) data points. Call X years and Y people. I understand the...

• Replies: 0
• Views: 2,050
09-30-2013, 09:23 AM
16. ### My nemesis: multinomial logistic regression

Dear all, For the final article of my PhD-thesis, I need to analyze various categorical results. My goal is to find whether a certain genotype...

• Replies: 1
• Views: 1,522
09-30-2013, 08:30 AM
17. ### SPSS - Logistic Regression - Continuous independent and moderating variables

Hi, I'm trying to analyse the relation between 4 independent variables and 1 dependant variable (yes=1, no=0), using Logistic Regression, in SPSS....

• Replies: 6
• Views: 2,864
09-29-2013, 11:46 PM
18. ### Time Series Question:Garch to forecast price/return?

Is it possible to use Garch to model price or return?or does Garch only model the volatility of price/return? Thanks

• Replies: 0
• Views: 1,603
09-29-2013, 02:20 PM
19. ### Multiple Regression Help

Hello, I need help/advice with multiple regression analysis. I am looking at the degree of discrimination towards women in construction...

• Replies: 0
• Views: 1,658
09-28-2013, 10:24 PM
20. ### Panel Data Regression

Hi all, I was wondering if I could get some advice on the research I'm attempting to carry out which involves the following data for 30 countries...

• Replies: 1
• Views: 1,440
09-27-2013, 08:11 AM
21. ### the sign of correlation and regression coefficients

Hello I have 9 predictor variables that all of them are positively correlated to the dependent variable. But for running a regression analysis I...

• Replies: 2
• Views: 1,990
09-26-2013, 03:52 AM
22. ### percentages

I am having trouble figuring out what analysis to use for my research. I am investigating the social factors (gender, age, education level, etc.)...

• Replies: 0
• Views: 1,370
09-25-2013, 12:45 PM
23. ### Does anybody know if the Oaxaca Blinder decomposition command is now available SPSS?

Hi, I was wondering if it was now possible to run the Oaxaca Blinder decomposition on SPSS? I know it is possible on Stata but I do not wish to...

• Replies: 0
• Views: 2,583
09-23-2013, 05:42 PM
24. ### Obtain the least squares estimator b1 of B1.

Given the regression model Yi=B1Xi + ei for i=1,2,...,n. Is the estimator unbiased? So this represents the simple model with B0=0, but I'm not...

• Replies: 6
• Views: 3,293
09-23-2013, 04:32 AM
25. ### Comparing coefficients on two same DV same IV models

I'm running regressions on two models using the same (8) independent and dependent variables. The dependent variable in the two models spans two...

• Replies: 3
• Views: 3,101
09-19-2013, 09:58 AM
26. ### Adjusting for gender in total brain volume

Is there a way to adjust for the effect of gender on the outcome measure - brain volume without using it as just a co-variate. i.e. can I transform...

• Replies: 0
• Views: 1,919
09-18-2013, 05:45 PM
27. ### Constructing Prediction Intervals for Forecasted Values in a Time Series

I have a time series with 231 data points and the following descriptive statistics: Mean 75,231.66 Standard Error 969.98 Median 70,728.00 ...

• Replies: 3
• Views: 5,580
09-18-2013, 09:14 AM
28. ### How exactly does MLR hold other things constant?

Hi all, I have just signed up to the forum and I am quite inspired by the discussions. I have an intermediate level experience in statistics...

• Replies: 2
• Views: 3,008
09-17-2013, 09:46 AM
29. ### Combined or separate regressions?

Dear forumites, I have a (I guess) pretty basic question concerning multiple linear regression. My situation is the following: I have a...

• Replies: 2
• Views: 1,796
dgi
09-16-2013, 10:33 AM
30. ### Sum of the squared least squared residual

Hey guys! This is my first post on this booming forum! I came across a problem that asks "Find the Sum of the squared least squared residual"...

• Replies: 0
• Views: 1,430
09-16-2013, 09:50 AM
31. ### multiple imputation and nested/hierarchical regression

Can anyone enlighten me as to how I can conduct a nested/sequential/hierarchical regression using multiply imputed datasets in R or Stata? In Stata,...

• Replies: 0
• Views: 1,577
09-15-2013, 04:12 PM
32. ### Reading Binary Logistic Regression results

Hi! Need some help on Binary Logistic Regression results interpretation. 1) On Block 0: Begining Block i have overall percentage of 76%, but...

• Replies: 4
• Views: 3,360
09-13-2013, 08:10 PM
33. ### LS, BLUE and ML Comparison

Hi, I have two questions on my study guide for econometrics that I have trouble answering and was wondering whether someone could help me out...

• Replies: 3
• Views: 1,542
09-13-2013, 04:48 PM
34. ### Understanding Dynamic Panel Data Models - Arellano-Bond and the like

Hey, the more I'm reading about models to analyse panel data, the more confused I end up. Right now, I'm at a point where I don't know anymore...

• Replies: 0
• Views: 2,589
09-13-2013, 04:35 PM
35. ### random factor levels with highly varying numbers of data points

Hi! I am doing a fairly straightforward analysis where we have a dependent variable which we try to measure many times under different conditions...

• Replies: 0
• Views: 1,360
09-13-2013, 02:23 PM
36. ### Transformed dependent variable

Hi, Apologies if this is simple, my background isn't in statistics. I am using geographically weighted poisson regression to explore relationships...

• Replies: 0
• Views: 1,382
09-13-2013, 11:36 AM
37. ### Ordered logit with likert type independent variables

Hello I am estimating a model where the dependent variable takes three possible values (1,2,3 ), which also have the respective meaning, i.e. 3...

• Replies: 0
• Views: 2,386
09-12-2013, 10:25 PM
38. ### regression query

Hi All Id appreciate any help on this query. I'm new to stats so please bear with me. I need to calculate voc emissions from car care...

• Replies: 2
• Views: 2,118
09-12-2013, 11:09 AM
39. ### Plot interaction effects

Hi! I already know how to plot the predicted probabilities of binomial models without any interaction terms: predicted logit = a + bX ...

• Replies: 6
• Views: 7,580
09-12-2013, 10:23 AM
40. ### Beta of 0 and p-value of 1

Hello, I am estimating a 2 stages least squares model. My first stage is fine ( strong instrument) but my second stage gives my coëfficiënt in...

• Replies: 3
• Views: 2,818
09-10-2013, 02:08 PM
41. ### Repeated Measures ANOVA (Split-Plot ANOVA) analysis of residuals

Hi, how to process decent residual analysis in repeated measures? I know that the residuals should have normal distribution (altogether an in...

• Replies: 5
• Views: 3,932
09-10-2013, 07:02 AM
42. ### R square change and different dependent variables?

Is the R square change statistic that is used to compute significances of differences between blocks/steps of a sequential/hierarchical regression...

• Replies: 1
• Views: 2,442
09-09-2013, 08:11 PM
43. ### 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...

• Replies: 5
• Views: 4,876
09-09-2013, 03:14 PM
44. ### Assessing the relationship between a continuous variable and categorical variables

Hello! I have a problem for which I have trouble finding a solution. I would like to assess the relationship between a continuous dependent...

• Replies: 2
• Views: 2,924
09-09-2013, 12:20 PM
45. ### Multiple Regression with Discrete and Continuous data in Excel

Hi, I've got lots of rows of data in Excel (around 3,500), and multiple variables. 1 of my variables is continuous (company revenues) 1 of my...

• Replies: 0
• Views: 2,584
09-09-2013, 09:19 AM
46. ### MSE calculation question

On a homework assignment I was recently given I have the following data points for calculating a regression line -- Y values: 2,2,1,1,3,4,5,5,7,6...

• Replies: 0
• Views: 1,628
09-08-2013, 11:16 PM
47. ### Monte Carlo Simulations for Evaluating the Performance of Regression Parameter Estima

Hi, You could tell me the reason(s) for the following: Let S1 = the average of the standard errors of parameter estimates from M simulations; ...

• Replies: 0
• Views: 1,441
09-07-2013, 09:24 AM
48. ### SPSS- Binary Logisitc Regression- what to do when there are few significant variables

Hi, I am looking at the factors associated with successful smoking cessation. I have two groups (smokers and ex-smokers) so I am using binary...

• Replies: 0
• Views: 1,378
09-07-2013, 07:48 AM
49. ### R-square for linear mixed models

What is the best way to calculate the R-square of a linear mixed model? May first guess would be to correlate the predicted values with the...

• Replies: 2
• Views: 2,160
09-07-2013, 05:39 AM
50. ### Variance components mixed models trouble

Hello, I am using mixed models for variance components analysis and have encountered some problems with non-constant variance and...

• Replies: 0
• Views: 1,819
09-07-2013, 05:14 AM
51. ### Need help with regression analysis

Hi everyone, I am kinda confused with regression analysis. My research is to investigate the degree and trend women in the construction industry...

• Replies: 4
• Views: 1,697
09-06-2013, 10:13 AM
52. ### LH ratio significant but covariates not?

I have performed Cox regression analysis using Forward LR method. As a results two covariates are included in the final model. First one has two...

• Replies: 5
• Views: 1,765
09-06-2013, 10:06 AM

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