R: Sample data for difference in difference

base_did {fixest} | R Documentation

## Sample data for difference in difference

### Description

This data has been generated to illustrate the use of difference in difference functions in package fixest. This is a balanced panel of 104 individuals and 10 periods. About half the individuals are treated, the treatment having a positive effect on the dependent variable `y` after the 5th period. The effect of the treatment on `y` is gradual.

### Usage

    data(base_did)

### Format

`base_did` is a data frame with 1,040 observations and 6 variables named `y`, `x1`, `id`, `period`, `post` and `treat`.

- y: The dependent variable affected by the treatment.

- x1: An explanatory variable.

- id: Identifier of the individual.

- period: From 1 to 10

- post: Indicator taking value 1 if the period is strictly greater than 5, 0 otherwise.

- treat: Indicator taking value 1 if the individual is treated, 0 otherwise.

### Source

This data has been generated from R.

[Package fixest version 0.8.4 Index]