---
title: unitroot
description: Understand the usage, implementation parameters and examples of the unitroot
  function which is used to perform unit root test, stationarity tests like ADF and
  KPSS. Learn about regression types and the calculation of values like Test Statistic,
  P-Value, NLags, Nobs and ICBest.
keywords:
- unitroot
- stationarity tests
- ADF tests
- KPSS tests
- regression types
- unitroot parameters
- unitroot examples
- p-value
- n-lags
- n-obs
- icbest
- python commands
---

import HeadTitle from '@site/src/components/General/HeadTitle.tsx';

<HeadTitle title="economy/qa/unitroot - Reference | OpenBB Terminal Docs" />

Unit root test / stationarity (ADF, KPSS)

### Usage

```python
unitroot [-r {c,ct,ctt,nc}] [-k {c,ct}]
```

---

## Parameters

| Name | Description | Default | Optional | Choices |
| ---- | ----------- | ------- | -------- | ------- |
| fuller_reg | Type of regression. Can be ‘c’,’ct’,’ctt’,’nc’ 'c' - Constant and t - trend order | c | True | c, ct, ctt, nc |
| kpss_reg | Type of regression. Can be ‘c’,’ct' | c | True | c, ct |


---

## Examples

```python
2022 Feb 16, 11:16 (🦋) /stocks/qa/ $ unitroot
         Unit Root Calculation
┏━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━┳━━━━━━━━┓
┃                ┃ ADF        ┃ KPSS   ┃
┡━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━╇━━━━━━━━┩
│ Test Statistic │ -28.9536   │ 0.2928 │
├────────────────┼────────────┼────────┤
│ P-Value        │ 0.0000     │ 0.1000 │
├────────────────┼────────────┼────────┤
│ NLags          │ 0.0000     │ 3      │
├────────────────┼────────────┼────────┤
│ Nobs           │ 759.0000   │        │
├────────────────┼────────────┼────────┤
│ ICBest         │ -3339.2013 │        │
└────────────────┴────────────┴────────┘
```
---