What is the log function in Stata?

A log is a file containing what you type and Stata’s output. You may start multiple log files at the same time, and you may refer to them with a logname. If you do not specify a logname, Stata will use the name .

How do you calculate log in linear regression?

The logarithmic transformation is what as known as a monotone transformation: it preserves the ordering between x and f (x). Recall that in the linear regression model, logYi = α + βXi + εi, the coefficient β gives us directly the change in Y for a one-unit change in X.

What is log-linear form?

A log-linear model is a mathematical model that takes the form of a function whose logarithm equals a linear combination of the parameters of the model, which makes it possible to apply (possibly multivariate) linear regression.

What is a log-linear model used for?

Log-linear analysis is a technique used in statistics to examine the relationship between more than two categorical variables. The technique is used for both hypothesis testing and model building.

How do you create a log file in Stata?

To create a log file, go to “File” -> “Log” -> “Begin.” This will bring up a dialogue box where you will save your log file. The default in Stata is to save the file with the extension . smcl. This will allow you to open the log file in Stata, but other programs will not read this type of file.

What is a log log model?

Using natural logs for variables on both sides of your econometric specification is called a log-log model. In principle, any log transformation (natural or not) can be used to transform a model that’s nonlinear in parameters into a linear one.

Is a log-linear model linear?

The original model in these types of scenarios isn’t linear in parameters, but a log transformation generates the desired linearity. You can estimate this model with OLS by simply using natural log values for the dependent variable (Y) and the original scale for the independent variables (X).

Do file vs log file?

A do-file is a series of commands to be executed in the correct sequence. Do-files document what you did and they are also a good way to identify and correct any mistakes that have been made. Log-files are Stata output files. They also include the documentation of what you did and also your results.