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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### 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: 3,575
03-22-2013, 07:57 PM
2. ### Logistic Regression Probability

Hi Guys, I'm working on a simple logistic regression problem. I'm wanting to find the exact value of x(independent variable) that gives a 0.5...

• Replies: 4
• Views: 2,558
04-22-2011, 02:47 PM
3. ### Introduction of Heteroscedasticity with additional variable

Hi everyone, I am running an analysis in which I am also checking for heteroscedasticity of my data. The tests tell me that I have...

• Replies: 3
• Views: 1,536
10-29-2013, 08:19 AM
4. ### Regularized Canonical Correlation Analysis

Hi, I have a question about sample size and regularized canonical correlation analysis. Is a sample size of 15 unreasonable to use in a regularized...

• Replies: 0
• Views: 2,046
05-01-2011, 08:05 PM
5. ### Same variable on both sides - how to resolve this?

I have a regression which is supposed to capture the effect of R&&D expenditures on stock returns, given some controllers X1, X2 and volatility, i.e....

• Replies: 1
• Views: 1,672
09-11-2016, 07:42 AM
6. ### relative risk ratios and standard errors

Hey forum, Odds ratios or relative risk ratios are calculated by exponentiating the coefficients (from a binary or multinomial logit model),...

• Replies: 2
• Views: 2,852
05-04-2012, 08:17 AM
7. ### Analysis of promotional data by department

Hi all, I have recently started an internship with a major UK retailer. My project is to come up with a model (and analysis) for promotions that...

• Replies: 6
• Views: 1,196
07-15-2013, 08:38 AM
8. ### 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...

• Replies: 0
• Views: 4,930
11-08-2010, 04:04 AM
9. ### Help with creating a dummy variable with a categorical variable.

I am very new to stats and this is not my thing. I need help in a class with creating dummy variables for the variable "education level". Im not...

• Replies: 1
• Views: 1,434
12-08-2014, 02:54 AM
10. ### Easy but need help

Hi all! I am doing an experiment involving the age children started wearing glasses and comparing this to the age a parent started wearing glasses....

• Replies: 1
• Views: 1,381
12-15-2012, 09:31 PM
11. ### Can I compare regression models with same # predictors and same sample?

Hi there, As a part of my dissertation I want to compare a focal, new, variable against other well-known predictors of my outcome, so I plan to...

• Replies: 7
• Views: 1,780
04-28-2014, 11:49 AM
12. ### Prediction interval behaviour close to the origin

Hi I have a simple linear regression model, for which I have calculated the Confidence and Prediction Intervals. The model is fixed at the origin...

• Replies: 0
• Views: 2,738
03-21-2009, 07:30 AM
13. ### LSDV dropping states/variables?

So I am running a Least Squares Dummy Variable Regression (LSDV1) involving data from 21 states observed 3 times (2007, 2008, 2009) and dropping one...

• Replies: 1
• Views: 1,242
02-21-2014, 01:49 PM
14. ### Log-linear Regression Models with only the cell mean, variance, and sample size

Hi, I am working on a project with a contingency table with provide only the mean, variance, and sample size, but don't have the exact count of...

• Replies: 0
• Views: 2,056
07-15-2011, 01:10 AM
15. ### potential heteroskedasticity & autocorrelation problem with pooled cross-section data

hello 1) my data: i have collected a few thousand property transactions over the last 15 years. for each transaction i have got the price and the...

• Replies: 2
• Views: 4,058
01-11-2012, 03:56 PM
16. ### Unexpected output for multivariate logistic regression

Hi, After I'd tested a couple of univariate logistic regressions for all of my IVs, I runned a multivariate logistic regression with all the IVs...

• Replies: 2
• Views: 1,341
07-16-2014, 07:50 AM
17. ### Help needed with ANOVA analysis

ANOVA df SS MS F Significance F Regression 6 5510.4 918.4 11.67 0.0081 Residual 5 393.2 78.65 Total ...

• Replies: 1
• Views: 5,041
11-18-2008, 03:32 PM
18. ### Checking temporal dependency

Hi guys, this is my problem: I have performed some experimental tests (tomographies) on 40 samples. These samples are made by four different...

• Replies: 2
• Views: 2,711
01-11-2017, 01:12 PM
19. ### Logistic Regression: To dummy code or not to? Which backward elimination to use?

I have 10 binary dependent variables (disease prevalence: yes/no, 1/0). I want to do a logistical regression with each of them with the following...

• Replies: 5
• Views: 16,405
02-22-2013, 11:13 AM
20. ### Binary logistic regression. missing values

Hi. I have a question about missing values. My dependent value is whether the respondend voted in the last election or not - N=2600 cases. I want...

• Replies: 0
• Views: 1,155
12-19-2012, 04:55 AM

Hello! Before I start the whole story, I am going to sumamrize my main question beforehand so the story will hopefully make more sense. Mainly,...

• Replies: 0
• Views: 1,962
04-25-2012, 02:01 PM
22. ### Combining Regressions

Hi, I have several different regressions for various sites within an area estimating Y from X. I would like to combine all these sites in to...

• Replies: 3
• Views: 7,610
12-28-2007, 11:31 AM
23. ### Variables in Logistic Regression Analysis

I am trying to come up with a model to predict a binary dependent solution. I want to incorporate ordinal independant variables as the predictors. ...

• Replies: 2
• Views: 7,286
07-23-2010, 10:10 AM
24. ### Finding Significant Difference between Linear Regressions

Hello. I have a scatterplot with two different sets of data plotted. Each individual set has its own linear regression formula and R-squared...

• Replies: 0
• Views: 1,029
07-16-2015, 11:31 PM
25. ### [R] How to calculate Confidence Interval for a prediction using Partial Regression?

Dear all, I have two highly correlated variables (y and x), and both of them depend on a third variable (A, for Area). Multiple regression...

• Replies: 0
• Views: 1,670
06-11-2012, 06:15 PM
26. ### What is the “pdm” stat in the “rms” R package?

I am new to the world of Regression in statistics and I have been doing a research in which I am building an ordinal logistic regression model (ORM)....

• Replies: 0
• Views: 3,101
11-27-2014, 07:17 PM
27. ### 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: 2,996
10-01-2013, 08:57 AM
28. ### Do you think there is any correlation between this two variables?

Do you think there is any correlation between these two variables? scatterplot: http://www.directupload.net/file/d/3641/5g58d9hx_jpg.htm data...

• Replies: 1
• Views: 1,446
06-02-2014, 09:34 AM
29. ### Determine if a quadratic regression is appropriate for the data?

How does one determine if a quadratic regression is appropriate for the data? I am using the programming language R. I have data that I would like to...

• Replies: 1
• Views: 1,354
06-22-2014, 01:12 AM
30. ### Assessing model fit

I have built two logistric regression models: one forced entry model that features some highly insignificant variables, and a stepwise one that,...

• Replies: 1
• Views: 1,562
07-09-2012, 12:48 PM
31. ### Distribution of fixed effects

Hi all, Let me shortly introduce my research: I am looking at whether companies outperform each other in investments. To do this I observe them at...

• Replies: 3
• Views: 868
06-09-2017, 11:56 AM
32. ### Compare regression coefficients of two settings with similar samples

Dear Statisticians, For my thesis I am currently examining whether the accounting principles have an influence on the relation between having a...

• Replies: 0
• Views: 336
06-09-2017, 03:32 AM
33. ### independant variables?

I'm a little confused on the whole dependent-independent thing.... I'm doing a multiple linear regression with 13 variables in order to predict...

• Replies: 0
• Views: 2,059
02-08-2011, 03:50 PM
34. ### Impossible exam question!

I just got done taking an exam by an evil and cruel professor who likes to throw in problems that he's never discussed in class, never assigned for...

• Replies: 8
• Views: 4,480
04-29-2011, 11:00 PM
35. ### which model to use?

I have a dependent variable that is limited and discrete (it goes from -9 to 9 in whole numbers), yet the residuals produced from a linear regression...

• Replies: 10
• Views: 3,248
08-03-2011, 01:34 PM
36. ### Research Question Regarding Logistic Regression

Hi all, I am conducting a medical study with n=179 subjects and have something like 30 independent variables that I am comparing to 1 outcome. I...

• Replies: 3
• Views: 2,778
08-16-2011, 12:32 PM
37. ### Complicated Research quesiton

Im looking to do some research in the social science field and I have to do a statistical analysis of a complicated set of self report measures. I'd...

• Replies: 8
• Views: 3,581
12-30-2016, 12:33 PM
38. ### Seemingly Unrelated Regression vs Maximum Likelihood ~ best for constraints?

I am currently doing research and I am utilizing an almost ideal demand system. It is essentially a regression equation that seeks to model consumer...

• Replies: 0
• Views: 1,629
04-20-2012, 03:10 AM
39. ### Ordinal vs Multinomial

I am interested why predicted probabilities for ordinal and multinomial regressions differ? Can we explain this difference in terms of multinomial...

• Replies: 0
• Views: 1,122
05-31-2015, 05:25 PM

okay the regression formula that i have worked out is y=12559.7477 + 4265.7566X i have to discuss the size, sign, significance and meaning of this. I...

• Replies: 1
• Views: 6,113
03-27-2011, 08:49 PM
41. ### what is cross section regression analysis?

Can someone help me by defining what is cross section regression analysis and the limits of this. :)

• Replies: 1
• Views: 22,024
04-06-2011, 12:40 PM
42. ### what does the parameter a and b mean?

I have worked out the regression equation Y= 12559.7477 + 4265.7566X What does 12559.7477 and 4265.7566X mean? Is 12559.7477 the y-intercept...

• Replies: 0
• Views: 2,315
03-29-2011, 04:54 AM
43. ### How can I conduct a regression analysis with these data?

Hey, I am currently writing a working paper that attempts to find out which factors determine the location choice of Chinese firms when they invest...

• Replies: 0
• Views: 1,041
04-29-2013, 05:36 AM
44. ### Appropriate null hypothesis for a two-stage regression

Hi – thanks everyone for your help in advance. I’m working on a two-stage regression, in which a coefficient from the first regression is used as an...

• Replies: 0
• Views: 1,404
04-23-2012, 08:25 AM
45. ### Power-law relation (Help Please)

Hi there, I wonder if you can kindly help me with questions below 1) I have data to apply for a power-law relation (A=B*C^D). I am using excel to...

• Replies: 3
• Views: 2,205
07-26-2011, 09:28 PM
46. ### Error distribution and non linear models.

Ok, I am reformulating this question because it started rather silly. As I always point out, my background is not statistics so please excuse my...

• Replies: 0
• Views: 1,983
02-16-2011, 11:31 AM

Greetings everyone, I'm currently working on my Bachelor thesis relating to behavioral finance. My topic requires me to run a regression analysis...

• Replies: 4
• Views: 2,843
07-24-2016, 02:41 AM
48. ### Estimation - the best factor?

I need your help if you can. I get some measurement results. If everything work correct results keep close to nominal value: If the...

• Replies: 0
• Views: 1,796
12-20-2013, 02:40 PM
49. ### SEM logic: beginner question

Hello everybody, I have a question with regard to the basic logic of SEM: How is it plausible to expect that, for example, four indicators (a1,...

• Replies: 2
• Views: 2,443
06-11-2011, 05:26 AM
50. ### Benefits of converting dependent variable to log form?

For regression analysis, what is the benefit of converting the dependent variable to log form. I'm using hourly wages as the dependent variable. ...

• Replies: 5
• Views: 2,361
01-16-2014, 11:11 AM
51. ### Question on interpreting test statistics/regression coefficients

When I run a regression of: logwage = height + dummy variables for each different occupation The coefficients on the dummy variables are all...

• Replies: 3
• Views: 1,523
03-01-2014, 05:18 PM

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