pCADF Unit Root Test for Panel Data

Code Description:

1. Functionality: This code conducts the pCADF (panel Covariate Augmented Dickey-Fuller) unit root test across different regions and variables.

2. Input Data: The input data file should be an Excel sheet, where each region’s data is stored in separate sheets. The data must include columns for country, year, and the specified variables.

3. Exogenous Terms: The code supports three exogenous terms: "none", "drift", and "trend", which can be selected in the test.

4. Output: The results are saved in an Excel file, with test statistics and p-values for each variable and region, in the working directory.