All Questions
Tagged with logarithm multiple-regression
35
questions
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72
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Deriving the Exact Percentage Change Formula in Logarithmic Models
I have been studying the relationship between logarithmic changes and percentage changes in the context of regression analysis. I understand that when working with small changes, the change in the ...
- 83
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1
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43
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Dealing with 0's in loglog regression by using indicator functions I(x > 0)?
Assume we want to estimate the following model
$y = e^{\beta_0} * x_1^{\beta_1} * x_2{\beta_3}$ which we can linearize into
$\log(y) = \beta_0 + \beta_1 * \log x_1 + \beta_2 * \log x_2$
Assume that ...
0
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0
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30
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loglog regression with 0's in IV's
Assume we have 2 predictors $X_1$ and $X_2$ and an outcome $Y$ that we wish to model with the following function
$y = e^{\beta_0} * X_1 ^{\beta_1} * X_2^{\beta_2}$
Also assume that we have some priors ...
0
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38
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Interpretation of parameters in loglog-regression with scaled variables
Consider e.g the model $y = e^{\text{trend} + \text{seasonality}} \cdot \prod_{k \in \text{channels}} x_k^{b_k}$
where $i$ constrained $0 < b_k < 1$ (to capture diminishing marginal returns)
...
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1
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75
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interpretation of loglog regression
It is common econometric disciplines to model an baseline + incremental quantity due to treatment. E.g baseline sales + incremental sales(due to marketing).
It is common to deploy loglog models to ...
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31
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Log Transforming variables already in percentage [duplicate]
I'm running a regression analysis and I'd like to know if log transforming a percentage value is ok. My y-values are already in percentages and my x-values in absolute numbers. But I'd like to know by ...
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74
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E appearing in Regression table [duplicate]
I am trying to run a regression between oil price in the US over a 60 year period and REAL GDP. I have run a simple linear regression (I also do not know if this is appropriate or not--should I be ...
3
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1
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128
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Dummy variables in regression with log-transformed continous variables
I have a question dealing with logarithmic variables, log-sum and dummy variables in a multiple regression.
First of all I’ve never worked with log-sums before.
I have a model with y that is log-...
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1
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172
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How to log transform a small percentage value?
My independent variable is interest rate, which is small positive variable(less than 1). When I log transform the values, they turn negative because the values are smaller than 1. What is the solution?...
- 245
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632
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Transforming a natural log of a variable into the original variable
I am using a replication dataset for a research, and one variable (GDP per capita) is included in the dataset only as a natural logarithm. Is it possible to transform the ln(GDP per capita) back into ...
- 11
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58
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Log-Log regression not giving me elasticity [duplicate]
Ive got a regression in the form log(y) = a +b1x1 + b2x1^2 + b3x2 + b4x3 + b5* log(x4).
I've interpreted my coefficients as they should be interpreted.I figured out the quadratic and e^b3 and e^b4 are ...
- 41
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172
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How would you get absolute values from a multivariate log-log model?
I have a log-log model that looks something like this:
$$
\ln (sales) = 8.15 + 0.0516\times \ln(digital) + 0.74\times \ln(tv)
$$
I understand I can interpret the variables in terms of percentage ...
- 11
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votes
1
answer
343
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Solution for equation of log linear regression
Update:
I would like to solve a log-linear equation and interpret the final result. I was noted that my question was not complete/unclear. Fine, now I took a dataset from Kaggle as the example to ...
- 161
1
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65
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Converting coefficients from a linear model into percentages
I've got two different sets of regression models, one set is linear and the other log-log. The two models have the same independent variables but different dependent variables. I'm looking for a way ...
- 11
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439
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Interpretation of log ratio as dependent variable and independent variables
I am estimating two linear models. In the first, the outcome variable is a log ratio equal to log(measure at t/measure at t-1) and the independent variable is logged. In the second, the outcome ...
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