# Tagged Questions

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### Plotting variables in transformed space

Suppose $A = X_1/X_2$ and $B = X_3/X_4$. Why would one plot the data in $(\log A, \log B)$ space as opposed to $(A,B)$ space?
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### Elasticity with log + 1

I am running time series regressions to estimate the percentage change in quantity to a percentage change in price, with the most basic form being $\ln Q = \beta_0 + \beta_1\ln P + \varepsilon$, where ...
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### Why use logged variables?

Probably, this is a very basic question but I don't seem to be able to find a solid answer for it. I hope here, I can. I'm currently reading papers as a preparation for my own master's thesis. ...
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### Logistic regression with an log transformed variable, how to determine economic significance

I am using a logistic regression model with continuous independent variables and two log transformed size variables (total assets and total deposits). My question is how to interpret the results and ...
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### Is it mathematically justifiable to log transform variables before running an ANOVA?

I have a model with variables (financial ratios) and some of them are in percentages, some in days and some just ratios (negative and positive). I ran an ANOVA and the results were not so good. When I ...
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### How to interpret logarithmically transformed coefficients in linear regression?

I have 1 continuous dependent and 1 continuous predictor variable that I've logarithmically transformed to normalise their residuals for simple linear regression. Can someone give me some pointers on ...
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### When (and why) to take the log of a distribution (of numbers)?

Say I have some historical data e.g., past stock prices, airline ticket price fluctuations, past financial data of the company... Now someone (or some formula) comes along and says "let's take/use ...
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### Back-transformation and interpretation of $\log(X+1)$ estimates in multiple linear regression

I have performed multiple linear regression analyses with different combinations of transformed and untransformed variables--both explanatory (independent) and response (dependent) variables. All ...
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### Interpretation of log transformed predictor

I'm wondering if it makes a difference in interpretation whether only the dependent, both the dependent and independent, or only the independent variables are log transformed. In the case of ...